24 SIR CHARLES ELIOT. 



has on each side of it a short, thick, blunt tentacle. The rhinophores are much larger 

 than these tentacles (4 7 mm. high), wrinkled but not perfoliate. The back is 

 strongly arched, and shows a clear central space, 3-4 mm. wide, without any cerata. 

 The head and the foot are of about the same breadth, 4 5 mm. 



The jaws are brown and hard, enclosing the buccal mass. The masticatory process 

 bears a single row of very irregular projections of varying shapes, with little lumps 

 behind them, but there cannot be said to be any regular denticles. The radula 

 consists of a single row of twenty-six brown teeth (figs. 25 and 26). They are of the 

 horse-shoe shape with a fairly strong central cusp, and six, or rarely seven, lateral denti- 

 cles. The outermost denticle is curved strongly inwards. The others are fairly straight. 



9. CUTHONELLA PARADOXA. 



ONE specimen from Winter Quarters, captured February 20th, 1902. It is yellow 

 with traces of reddish brown and some minute reddish dots on the larger cerata. The 

 intestines and hepatic diverticula, as seen through the integuments, are reddish brown. 



FIG. 27. Cuthonella paradoxa A TOOTH ; a FROM ABOVE ; 6 FROM BELOW. 



Length, 11 mm., breadth, 8 mm., height, 4 '3 mm. The pointed tail, as distinct from 

 the dorsum, is 2 3 mm. long. 



The oral tentacles are 2 mm. long, and point straight right and left. The rhino- 

 phores are 3 mm. long, stout, bent forwards and bear transverse rings, but it is not clear 

 if these rings are natural or the result of contractions. 



On the left side is a single line of twelve cerata along the dorsal margin, none 

 more than 1 mm. high, conical, with gaps between them, so that the line is probably 

 not complete. Within this line there remains still attached a single very large papilla 

 about 7 mm. long and rather bent. It is behind and slightly to the left of the anal 

 papilla. On the right-hand side is a similar line of twelve cerata, mostly rather larger. 

 Under the first three of them is a second row of three very small ones. In the bottle 

 are seven detached cerata measuring 7, 5, 5, 4, 4, 3, 2 mm. respectively. The anal 

 papilla is dorsal, set far back (7 mm. from anterior end) and slightly to the right of the 

 median line. The genital orifices are 4 mm. from the anterior end, rather high up on 

 the side. 



The anterior end of the body forms a hood over the mouth which, as preserved, is 

 ventral. The foot is rounded in front, thickened at the margin and slightly expanded, 



