STALK-EYED CRUSTACEA 417 



d. Eye-peduncle not prolonged beyond cornea : — 



5. Galacantha. 



Galacantha . A. Milne Edwards, Henderson, Faxon, 

 A. Milne Edwards and Bouvier. 



Rostrum long and spinulose, the proximal part 

 horizontal, the apical portion upturned. Carapace broad, 

 convex from side to side, armed with a median spine 

 of large size, placed near the posterior limit of the gastric 

 area, and with an anterior gastric pair of spines and a 

 cardiac spine of smaller size. Lateral margin of the 

 carapace provided with two prominent flattened spines 

 in front. First pair of legs rather stout, and exceeded in 

 length by the walking legs. Eyes devoid of pigment, 

 with the cornea terminal in position. Antennal peduncle 

 stout ; the flagellum of moderate length. Second, third, 

 and fourth abdominal segment strongly bicarinate 

 transversely, and armed each with a prominent median 

 spine. Male reproductive appendages of large size. 

 Eggs few and large. 



Range. — Very deep seas. 



I. Galacantha spinosa. 



Galaeanf/ia spinosa . A. Milne Edwards, A. Milne 



Edwards and Bouvier. 



Rostrum without spines at its base. The carapace is 

 covered with spiny tubercles in place of granulations ; the 

 first lateral spine is larger than the second ; the meso- 

 gastric point is large and compressed. The segments of 

 the abdomen are covered with pointed tubercles. The 

 pincers are smooth. 



Range. — Dominica. 

 27 



