Videnskabelige meddelelser

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Videnskabelige meddelelser

175

membranous, finely jagged list. The posterior part of the buccal

cavity is funnel-shaped, rather deep and narrow; on the edge of

the funnel is seen three short and acute prominences which seem

to be bent over the mouth of the funnel (PI. VIII, fig. 2).

In the males are seen besides the same two buccal divisions

mentioned in the female, but in front of these, two others, cor-

responding with what is known in Sphærolaimus hirsutus (PI. VIII,

fig. 8). Also in other respects the male shows relation to Sphæro-

laimus and is set with the same fine hairs as mentioned above.

After all: I must consider the female, as well as the male, as

a true Sphærolaimus but I am not for the present able to settle

the question whether the front end of the female has been injured

or whether the two sexes are really different in respect to the

shape of the front end.

The length of the animals attains, for the female 2,4 mm, for

the male 2,3 mm. The shape of the body is much like that of

Sphærolaimus hirsutus tapering only very sligthly in the front end

and more in the posterior part of the body. The great length of

the æsophagus is striking at the first glance; it attains a length

between one third and one fourth of the whole length of the body.

The cuticle shows a delicate transverse striation, somewhat more

prominent than in S. hirsutus.

The setæ of the front end are all exceedingly fine, about as

fine as those which are spread, or arranged in longitudinal rows,

over the whole animal; in my specimens it is not possible to indicate

exactly their place. As known .S. hirsutus has at the front end a

circlet of stouter bristles, arranged in bundles, and, in his descrip-

tion of this species, de Man has exactly rendered account of their

position ; this is not possible on my preserved material. Besides

these bristles fine long hairs are seen on the cuticle just as in ^S.

hirsutus and perhaps still more abundantly than in that species.

As stated by de Man these fine hairs are in S. hirsutus arra.nged

in 8 longitudinal series, two dorsal, two ventral and two on each

side; probably it is the same in this species.

As to the structure of the buccal cavity some differences be-

tween .S. hirsutus and the specimen in question are to be pointed

out. The two foremost parts are much like those in S. hirsutus.

The third part differs conspicuously from the corresponding part

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