Videnskabelige meddelelser

Videnskabelige meddelelser


This generic diagnosis can only be considered as provisional

beyond doubt it will require modifications and additions when more

material can be procured. For the present the position of the genus

appears rather isolated in the system.

Stephanolaimus elegans n. sp.

Fl. V. ligs. 2, 3. PI. VI, lig. 8. .

Little Belt; ofF Lyngs Odde, 30 m. i

Though only one specimen was taken, a young female not sex-

ually developed, I have found it |suitable to describe it here on

account of its characteristic aspect which will permit its recognition

in future. The length is 2„5 mm and the body is rather elongated

and relatively narrow. Towards the front end it tapers gradually,

in the hindpart of the body it keeps its width a long distance be-

hind the anus which renders to the tail a peculiar aspect (PI. VI,

fig. 8). Its tip is covered by a smooth, refringing, chitinous coat

(PI. V, fig. 2).

The cuticle is coarsely striated, especially in the foremost part

of the body where the aspect of the animal is almost annulated.

The front end is rounded and forms a constriction behind a

dilatation of peculiar aspect (PI. V, fig. 3). It is possible, but in

my opinion not probable, that this dilatation consists of densely

situated minute hooks arranged in a circlet and surrounding the

mouth ;

it has not been possible to settle this question even by

means of the highest magnifying power.

Only one ring of bristles is seen, consisting of four long, tent-

acle-like setæ situated at the level of the base of the buccal cavity.

Between the front end and the bristles is seen a ring of fine,

Short longitudinal striæ, perhaps lateral organs of peculiar structure.

The buccul cavity is rather spacious, deep and funnel-shaped

without teeth or local chitinous thickenings; it continues gradually

without any traceable limit into the lumen of the æsophagus. This

is rather thin and increases gradually towards its base; its chitin-

intima continues a short distance into the lumen of the intestine.

No ventral gland is seen. The nerve-ring is indistinct.

The specimen is — as remarked above — a young, se.xuaily

immature female. A distance behind the middle of the body is

seen the genital gland, not developed. Vulva is not yet formed.

Length: 2,-> mm. i

u = ?. /3 = 7,o. y = 10,«. I


More magazines by this user
Similar magazines