204 another beautifull form, Enoplolainms capul medusæ, and also some few specimens were captured oPF Snoghoj. The body is rather lengthened and slender; the length of the female attains 8 mm, the male only 6,7 mm. The tail is very short, conical and ventrally incurvate in both sexes. The head is truncate and behind this, at the level of the base of the buccal cavity, is found a neck-like constriction. Caudad to this is found a slight expansion, containing the lateral organs. In the front end of the head are seen two crowns of papillæ, one be- hind the other. Where the head has its greatest width is found a ring of bristles, rather stout and mediumsized. On each side, just behind the lateral organ, is a single, slender bristle and moreover thin and long hairs are spread over the foremost part of the body. Also in the posterior part, præ- and postanally, several hairs are seen (PI. XIII, fig. 2). The buccal cavity is very spacious; it is considerably broader in the formost part. Caudad it tapers and shows a rounded bottom so that the shape is like a broad and deep cup. The three teeth are very unequal in size the one being much larger than the two others. In this species it appears to be the left, subventrally situ- ated, tooth that is the largest. The æsophagus, which is rather long, is of about uniform width throughout its whole length; in its musculature is seen a great number of minute, refringing granules apparently like those commonly found in the intestine. The lateral organs are large and of a somewhat complicated structure. They are situated more caudad than seems to be the rule in the genus Oncholaimns where they generally are found at the level of the buccal cavity. In some respects they recall that in O. fuscus; as in that species is seen a duet that leads to the in- terior of the organ. 1 have not succeeded in ascertaining the place of the pore for the ventral gland. Vulva is found a considerable distance behind the middle, about at the beginning of the last third. It is rather prominent but no vaginal glands are seen. The female organ is symmetricai, the ovar- ies reflexed. Two shell-eggs are found in the uterus. The spicular-apparatus is rather characteristic. The spicules which
205 are strongly curved have a dilatation in their proximal end ; dis- tally they are hook-shaped and the incurvate tip of the hook ends in an acute point. An accessory piece is present; it has a long caudad pointing apophysis and a shorter cephalad pointing pro- minence (PI. XII. fig. 4). Length : 8 Female. Male. mm. 6,7 mm. u = 82. « = 83. /? = 7,4. fi = 6,8. y = 55,1. y ^= 52.5. Enoplus Dujardin. Enoplus communis Bastian. As this species is found in all tracts where I have been collect- ing, it will be of no use to enumerate all the single localities, many of these being near each other. 1 have taken the species in question in the Limfjord in the neighbnurhood of Nykøbing and Fur and in the Sallingsund; in Little Belt it was taken near Mid- delfart, off Snoghøj, Lyngs Odde and at Kongebro; in the Sound it was taken off Hellebæk. Further I have specimens from Kattegat, off Frederikshavn and from Tyborøn, captured by P. Kramp and kindly forwarded to me. I have hitherto not succeeded in finding the smaller species, E. hrevis which, according to de Man, is found together with E. communis though I have paid attention to it. Enoplolaimus de Man. Enoplolaimus latignathus n. sp. PI. XII. figs. 5. 6: Pi. XIII. figs. 1, 3. 4. 7 : PI. XIV. fig. 2: PI. XVI. fig. 3. Little Belt; off Lyngs Odde, c. 30 m. — off Snoghøj, c. 5 m. Some few specimens of this species were taken. The length of the female makes 5,6 mm, of the male c. 4,5 mm. The shape is rather lengthened and slender, and the body is of almost uniform Width ; in the region of the æsophagus it tapers somewhat. The head is broad and of a shape that reminds one of Sagitta (PI. XIII, fig, 1).