Videnskabelige meddelelser

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Videnskabelige meddelelser

186

versely striated. Under high magnifying power the striation is seen

to be restricted to the inner layer. Only one ring of bristles is

seen, consisting of 6 rather short, fine hairs, arranged in the usual

manner; they are situated in the named constriction of the front end.

The buccal cavity is well developed, funnel-shaped and pro-

vided with chitinous thickenings of the wall, but there are found

no teeth. The æsophagus is short and of equal width through-

out its length except at the base where it forms a considerable

bulb. Valvular apparatus is not seen in the bulb, but possibly there

is a cavity as known in different genera viz. Terschellingia and

Spira. The structure of the intestine could not be made out in

my specimen ; there is seen refringing granules and probably pig-

ment granules, crowded together to brown spots. A ventral gland

seems to be lacking.

The spicules are strongly curved ; their proximal half is pro-

vided with a dilatation and possibly is found a longitudinal list.

In my figure (PI. V, fig. 6) the proximal end of the two spic-

ules is of a different shape the one being reflexed ; presumably

this faet is due to the preservation or perhaps owing to a deform-

ity. Embracing the tips of the spicules is seen one or more acces-

sory pieces.

A row of 13 large masculine papillæ is found in front of the

anogenital aperture; each papilla has the shape of a little cup

and in optical section it seems to contain a cavity in its interior;

it is fixed to the cuticle with its rounded base and is projecting

conspicuously beyond it (PI. VI, fig. 1).

Possibly this form will prove to be related to Chromadora;

there is a considerable resemblance in the structure of the papillæ,

described by de Man in C. macrolainms and C. microlaimus

and the papillæ of Choniolaimus maculatiis. The cuticle also shows

likeness; it is striated transversally in Choniolaimus and with high

magnifying power are seen fine points scattered over its surface;

finally the æsophagus is provided with a well developped bulb,

The structure of the buccal cavity does not show any important

likeness; there is no tooth in Choniolaimus.

Length: 2,? mm.

« = 57. JS = 13,0. ;- = 28,:;.

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