80 DR. N. ANNANDALE 



temperature is not necessary for luxuriant reproduction and growth in marine animals. I 

 mention this fact because it must be remembered that the abysses even of tropical oceans 

 are cold. 



Alepas gigas, sp. nov. 

 Description — 



Capitulum distinct from peduncle, subglobular, laterally compressed towards the 

 edge of and above the opening, slightly turned up at the extremity of the cari- 

 nal edge, with no definite crest, but with a slightly thickened carinal ridge which 

 becomes obliterated on the peduncle ; opening vertical, narrow, rather long, with feebly 

 protuberant non-tubular lips. Integument thick, opaque, yellow, smooth for the most 

 part, but with a few branching striae and with straight wrinkles which tend to run at right 

 angles to the major axis of the opening ; short, stout hairs scattered singly on the 

 surface. Scuta large, almond-shaped, feebly differentiated, meeting in the middle line 

 below the opening. 



Peduncle considerably longer than capitulum, with the diameter increasing gradually 

 from above downwards, circular in cross section, profusely and regularly annulated, its 

 hairs longer and slightly more numerous than those on the capitulum. 



Dimensions — 



Length of Capitulum ... ... 44 mm. 



Breadth of ,, ... ... 29 ,, 



Length of Peduncle ... ... 83 ,, 



Diameter of ,, (centre) ... 21 ,, 



Appendages, etc. — 



First Cirrus with both joints long, slender, sub-cylindrical, separated from the 2nd 

 cirrus by a considerable gap. Remaining cirri composed of a very large number of short 

 joints, long and slender. Fifth Cirrus with posterior ramus moderately slender, composed 

 of about 24 joints, not more than one-half as long and a third as thick as anterior ramus. 

 Sixth Cirrus in much the same condition, with posterior ramus slightly stouter but not 

 relatively longer, with the same number of joints. Anal Appendages swollen at the base, 

 cylindrical, with 10 joints, the terminal bunch of hairs reaching slightly farther than the 

 point of junction of the two rami of the sixth cirrus. Penis short, stout, closely ringed, 

 not reaching as far forward as the mouth. 



Mouth- Parts — 



Labrum small, feebly protuberant, simple. Mandibles with 3 teeth ; the innermost 

 tooth dichotomous, the two branches having something of the appearance of a crab's 

 chela ; the two outer teeth simple, sub-equal; the body of the mandible partially clad 

 with short spines, the tips of which do not reach the cutting edge ; their pattern is 

 shown in Fig. 3b, PI. VIII. Maxilla closely resembling those of A. lankesteri, Gruvel, 



