DECAPODS 5 i 



Distribution. Southern California, 9 to 55 fathoms (rare). Taken at 

 the following stations by the Albatross : 

 Monterey Bay, 9 fathoms, station 3130. 

 Off Santa Barbara, 21 fathoms, station 2961. 

 Off San Miguel Island, 55 fathoms, station 2959. 

 Off Santa Cruz Island, 30 fathoms, stations 2944, 2945. 

 Off Santa Rosa Island, 52 fathoms, station 2956. 



Genus Pandalopsis Bate. 



KEY TO THE SPECIES OF PANDALOPSIS. 



A. Rostrum with spines on distal half of upper margin . . . dispar. 

 A'. Rostrum without spines on distal half of upper margin. 



B. Dorsal spines not continued to middle of carapace . . . ampla. 

 B'. Dorsal spines continued to middle of carapace. 



C. Palm of chela more than one and a half times as long as fingers. 



Rostrum less than twice as long as carapace proper . aleutua. 



C'. Palm of chela less than one and a half times as long as 



fingers. Rostrum more than twice as long as carapace 



proper longirostris. 



PANDALOPSIS AMPLA Bate. 



Pandalopsis amplus BATE, Challenger Rept., xxiv, 671, pi. cxv, fig. 3, 1888. 

 Pandalopsis ampla FAXON, Mem. Mus. Comp. Zool., xvm, 155, 1895. 



Surface remotely punctate. Rostrum one and a third to one and nine 

 tenths times as long as the rest of the carapace (in small specimens it may 

 be two and a half times the carapace), slightly ascending, slightly arched 

 above the eyes. Median crest occupying the anterior two thirds of the 

 carapace, armed with 7 to 1 3 movable spines, of which 3 to 5 are on the 

 carapace and in front of the middle, the anterior spine considerably 

 behind the middle of the rostrum. There is also a subterminal fixed 

 spine; and occasionally two subterminal spines both above, or one 

 above and one below. Greater part of the rostrum unarmed above. 

 Lower margin armed with 13 to 16 slender spines, larger toward the 

 base of the rostrum. Suborbital spine slender, prominent. Pterygos- 

 tomian spine short and slender. 



Eyes very stout, ocellus rudimentary. The peduncle of the anten- 

 nula extends to the middle or nearly to the middle of the antennal scale ; 

 the second segment is twice as long as the third ; inner flagellum at least 

 half as long as the body ; outer flagellum one fourth longer than inner, 

 thicker at the base, but gradually tapering. The peduncle of the an- 

 tenna does not reach quite to the end of the second segment of the 

 antennular peduncle ; flagellum one and a third times the length of the 



