Boone, Crustacea, Cruise of "Alva," 1931 135 



1.65 mm. long, 0.5 mm. wide proximally, very slightly tapered, 

 armed on the inferior lateral margin with about seven longish, 

 acute, articulated spines which are interspersed with long, soli- 

 tary setae ; the dactyl is 0.9 mm. long, tapered, laminate, acumi- 

 nate, unguiculate, with no accessory spines. The second leg is 

 identical and the third leg measures in the same proportions, but 

 appears different simply because it is so thin and small. Epipodites 

 are present on the legs, although rather small on the third pair. 



Remarks: While very close to Alpheus parvirostris Dana, 

 with which Dr. Coutiere, after examination of the type A. lineifer 

 E. J, Miers, has placed the latter as a synonym, this being con- 

 firmed by the researches of Dr. de Man ("Siboga" report), the 

 present Samoan species is unquestionably distinct therefrom, as 

 evidenced by the distinctive channelling of both surfaces of the 

 great cheliped of the type, an adult female. As neither Dana, 

 whose type is reported by de Man to be an adult female, Miers, 

 Ortmann, Coutiere, de Man nor Lanchester describe the distinc- 

 tive channelling possessed by the present species on the outer 

 surface and make no mention whatever of any channelling on the 

 inner surface of A. parvirostris, the latter evidently does not exist. 



Name : This species is dedicated to Mr. F. E. Brasch, curator 

 of the Smithsonian Division, Library of Congress, in appreciation 

 of the many courtesies he has extended the writer during the 

 preparation of this report. 



Crinitus Group, ss. Coutiere 

 Alpheus obesomanus Dana 



Plate 35 



Type: Dana's type came from the Fiji Archipelago and is 

 deposited in the Philadelphia Academy of Natural Sciences. 



Distribution: Gulf of California (Coutiere); Sandwich 

 Islands (Randall) ; Honolulu (Bate) ; Palmyra Island (Edmond- 

 son) ; Sandwich Islands and Fiji Islands (Dana) ; Tahiti (Hell- 

 er) ; Society Islands (Boone) ; Nicobar Islands (Heller) ; Samoa 

 (Lenz) ; Sydney, New South Wales (Heller) ; Tamatave, Mada- 

 gascar (Lenz) ; Lifu, Loyalty Islands, Blanche Bay, New Britain 

 (Borradaile) ; Trincomalee, Ceylon (Muller) ; Bombay (Guerin) ; 

 Gulf of Aykab and through the Red Sea (de Man) . 



