1921] Schmitt: The Marine Decapod Crustacea of California 33 



Acanthephyra curtirostris Wood-Mason 



Acanthephyra curtirostris Wood-Mason, Ann. Mag. Nat. Hist. (6), 7, 195, 

 1891; 9, 364, fig. 5, 1892; Illus. Zool. "Investigator," Crustacea, pi. 3, 

 fig. 4, 1892; Faxon, Mem. Mus. Comp. Zool., 18, 164, pi. 43, figs. 2-5, 

 1895; Bathbun, H. A. E., 10, 27, 1904. 



Pig. 19. Acanthephyra curtirostris, <$, lateral view of carapace (after Faxon). 



Characters. — Carapace and rostrum less than half as long as the abdomen; 

 carapace not distinctly carinated behind the gastric region. Eostrum a very thin, 

 high, obliquely ascendant frontal crest, the acuminate peak of which does not 

 exceed the antennular peduncle; armed above with seven to nine teeth, and below 

 with one or, more rarely, two spines at or before the middle of the ventral border; 

 occasionally the ventral tooth is obsolescent or but obscurely indicated. Second 

 to sixth abdominal segments, inclusive, sharply carinate; each carina ends in a 

 small tooth, that on the third segment being the larger, while that on the second 

 and frequently also that on the sixth is scarcely defined; sixth segment more than 

 half again as long as the fifth. 



Dimensions. — Type, male: length from tip of rostrum to end of telson 85 mm. 



Color. — In life crimson (Alcock). 



Type Locality. — Bay of Bengal, 840 fathoms ("Investigator" station 100). 



Distribution. — Arabian Sea, 937 to 1043 fathoms; Bay of Bengal, 364 to 913 

 fathoms; Andaman Sea, 922 fathoms (Alcock). From off San Clemente Island, 

 California, to off Gulf of Panama, 485 to 2232 fathoms. 



Genus Hymenodora Sars 



Body almost round, not compressed; carapace only compressed in dorsal part, 

 forming a sharp, high, median keel. Eostrum usually short, rarely long, armed 

 with teeth above only. Endopodite of first maxillipeds composed of only two 

 segments; the two inner distal lobes of the second maxilla rather broad and not 

 projecting beyond the basal lobe. Abdomen not carinate. Eggs usually of con- 

 siderable size. 



