722 



THE VOYAGE OF H.M.S. CHALLENGER. 



Anebocaris, 1 n. gen. 



Differs from Dia'plioro'pus, which it much resembles, in having the first pair of pereio- 

 poda chelate ; from Caricyphus in being without the characteristic hump on the third 

 somite of the pleon, and in the shortness of the sixth somite ; from Parathanas in 

 having the carpos of the second pair of pereiopoda uniarticulate, and in having the 

 carapace furnished with a supraorbital tooth. 



Anebocaris quadroculus, n. sp. (PI. CXXIII. fig. 1). 



Animal robust. Carapace having a large protuberance over the gastric region ; 

 supraorbital tooth large. 



Ophthalmopoda short, broad, and twice the length of the rostrum. 



Chelae of the first larger than those of the second pair of pereiopoda. Fifth pair 

 reaching beyond the ophthalmopoda. 



Habitat. — June 1874, off Port Jackson, Australia. One specimen ; taken at the 

 surface at night, associated with a specimen of Leptochela reversa. 



Off Sibago, Samboangan, Philippine Islands. One specimen. 



October 23, 1874, off Basilan Strait. Five imperfect specimens. 



China Sea, off Luzon. One specimen, with Caricyphus, Sergestes, and Lucifer. 



January 1873, Zebu Harbour, Philippine Islands. Three specimens, with Goner- 

 ichthys. 



The carapace is about half the length of the pleon or one-third the length of the 

 animal, and is dorsally smooth, except for a prominent tubercle on the gastric region. 

 The frontal margin is anteriorly produced to a smooth, horizontal, and sharply pointed 

 rostrum that is about one-fifth the length of the carapace. The outer canthus of the 

 orbit is not defined, and the fronto-lateral angle is produced to a sharp tooth. 



The pleon is about twice the length of the carapace and has the somites generally 

 subequal in length, the sixth being the longest and about the same length as the 

 telson. 



1 am.Sof, immature ; kx^is, shrimp. 



