DISCOVERY REPORTS 



fixation, and in them the arrangement of the glands cannot be studied, but the occur- 

 rence of the ventral glands from the 4th foot and of the dorsal from the Sth-gth, as 

 recorded by Southern, seems to be the more usual. Malaquin and Carin maintain that 

 there is no definite dividing line between the pinnule and the trunk of the foot, and 

 recognise an outer wrinkled part of the pinnule and an inner smooth part. I suggest 

 that the limits of the pinnules are largely, if not entirely, a matter of fixation. 



Sub-genus Johnstonella, Gosse 



Tomopteris (Johnstonella) kempi, n.sp. 



St. 4. 30. i. 25. Tristan da Cunha. 36° 55' 00" S, 12° 12' 00" W. o-io m. Gear N 100 H. 

 Seven specimens. 



liriTn 



o-" 



Fig. 27. Tomopteris kempi. Middle foot. 



Description. The largest of these specimens measures 55 mm. by 20 mm. including 

 the feet (there are 16 pairs of parapodia excluding the tail segments): among them 

 there are two young specimens measuring 12 mm. by 5 mm. 



The body has a rather swollen appearance and is very transparent : there is a monili- 

 form tail of seven or eight segments in which the feet are reduced to minute processes 

 near the segmental constrictions. The frontal horns curve backwards and there is a 

 very small notch between them. The neck is fairly stout. The anterior chaetigerous 

 processes are absent and the posterior are in the fully grown specimens about three- 

 quarters the length of the body, and in the young specimens about a third as long again 

 as the body; 



The brain is cordiform and the eyes are only visible when the specimen is cleared. 



Vibratile pits are present but their exact course cannot be seen because of the dis- 

 tortion of the prostomium in all the examples, caused by the eversion of the proboscis. 



