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cuously prominent lips, devoid of papillæ; no setæ. The cavity of 
the mouth has the same width throughout its whole length and is 
prismatic; it measures about "/12 of the length of the oesophagus; 
this contains an enlargement distinctly limited in the middle and 
has the proximal globular bulbus provided with the usual valvular 
apparatus. The intestine, the cells of which are filled with oil- 
drops of various dimensions, is much larger than the oesophagus. 
The porus excretorius is very indistinct and hardly observable; 
it is placed a little behind the middle of the proximal half 
of the oesophagus. Vulva which is placed slightly posterior to the 
middle of the body is rather prominent and forms a broad trans- 
verse fissure. The female organ is double; the uterus is very large 
and the ovaries extend far forward and backward in the body. In 
this respect individual differences occur; in many cases the distance 
of the bending of the antevaginal ovary from the proximal end of 
the oesophagus is equal to the half of the length of the latter, 
often, especially in older females, this distance is much shorter. 
The terminal ends of the ovaries nearly reach each other 
Opposite to the vulva; in younger specimens there can be a con- 
spicuous distance between them (fig. 4). The species is ovovivi- 
parous, having in older specimens the large uterus abundantly filled 
with lively moving young and ova in all stages of development 
In the figure 4, of a young female, is seen a lot of shell-eggs two 
of which are showing stages of cleavage. — The conical shaped 
tail is not narrowing to a point as Bastian indicates but shows 
under high magnifying powers a little globular dilatation (fig. 7). 
No duct for caudal glands is seen. 
In the male the bending of the-single testis reaches forward 
in the body to a distance from the proximal end of the oesophagus 
about equal to the length of the latter. The terminal end of the 
testis is placed nearly at the middle of the body. The bursa en- 
compassing the tip of the tail has on each side 2, 2, 3, 2 sup- 
porting-rays. (figs. 1, 2). The spicules, each of which are showing 
two longitudinal lists, are slightly curved and have a dilatation in 
Vidensk, Meddel. fra den naturh. Foren. 1911. Bd. 63. 16 
