19 
does not end free, but bends inwards and touches the next loop 
(fig. 12). 
The buccal cavity is rather narrow and the dorsal tooth is of 
a somewhat different shape from that of D. scaldensis ; it is rather 
longer, more acute and prominent. The oesophagus is rather nar¬ 
row in its foremost part, at its base it forms a distinet bulbus, 
cephalad to which is seen the rather indistinet nerve ring. 
The vulva is situated at about the middle of the body. The 
ovaries are symmetrical and reflexed. 
Oncholaimus Bastian. 
Oncholaimus carnleyensis n. sp. 
PI. I, figs. 3, 7. 
Locality: Auckland Islands. North-arm of Carnley 
harbour. Clay. 
Length: 2,5 mm. a — 63,5. ft = 6,7. y = 10,7. 
Only a single female was found in the material. 
The shape is siender, almost filiform ; it resembles 
somewhat that of O. giaber, described by de Man in 
1889, but it is more siender, and a doser examination 
proves that the likeness is more superficial, and that the 
two forms are rather different in several important re- 
spects. While in O. giaber a makes 40—45, it makes 
63,5 in the Auckland species. 
The front end is in shape a little different from O. 
giaber ; in this latter the head is nearly truncate and the 
mouth is surrounded by six lips each of which bears a 
minute papilla. In O. carnleyensis the head is rounded 
and there is no trace of lips. The cuticle is smooth, 
as usually in this genus. Bristles seem to lack enlirely 
even on the head, and in this feature the two forms well 
agree. The cephalic papillæ, mentioned by the above 
named author in O. giaber, I have not been able to 
observe in the Auckland form, not even with Apochr. 
2 mm; notwithstanding this, it is possible that exceed- 
ingly small papillæ may be present. The lateral organ p . r l3 0ncho 
is not very distinet, but it seems to be of about the laimus carnley 
ensis ; tail of 
same size and shape as in O. giaber. femaie. 
2* 
