BY WILLIAM A. IIASWaXL, M.A., B.SC. 347 



slender, acute spine, and at the posterior end with a second spine 

 of similar form, but shorter ; second segment with a pair of short 

 spines a little behind the middle of its dorsal surface ; the rest of 

 the segments unarmed. Eyes oval, red. Superior antenna) more 

 than twice the length of the cephalon ; flagellum nearly as long 

 as the peduncle. Inferior antennae nearly as long as the peduncle 

 of the superior pair. Anterior gnathopoda small, about two- 

 thirds of the length of the cephalon. Posterior gnathopoda very 

 large, more than four times as long as the anterior pair ; basos 

 long, slender, armed with a compressed tooth at the distal end of 

 its anterior border; carpus small; propodos very large, of irregular 

 form, constricted at the proximal end, broader distally, armed on 

 the dorsal border with three very large, compressed teeth, near 

 the middle, and a small blunt tooth at the distal end ; palm defined 

 by a short acute tooth, and armed about its middle with a sharp 

 spine which is separated by a deep sinus from a broad, compressed 

 process occupying the distal third of the palmar border. First 

 pair of pereiopoda more slender than the two posterior pairs ; 

 with the dactylos smaller ; dactyla of the posterior pairs nearly as 

 long as the propodos, palm defined by a small tooth. Length £ in. 



Sab. Clark Island, Port Jackson. 



Caprella cornigera, sp. nov. (PI. XXIII., fig. 5.) 



Neck very long ; the other segments increasing in length to 

 the fourth ; fifth rather shorter than the fourth ; second, third, 

 and fourth segments each with a pair of cornua on the middle of 

 its dorsal border, and a short conical tooth at its posterior 

 extremity. Eyes small, round. Superior antennse half as long 

 as the cephalon and pereion ; flagellum as long as the last segment 

 of the peduncle, of seven articuli of which the first is very long. 

 Inferior antenna? very small, little longer than the first segment 

 of the peduncle of the superior pair ; flagellum as long as the last 

 segment of the peduncle, of four articuli. Anterior gnathopoda 

 small, propodos ovate, narrowing distally ; palm nearly 



