392 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



does not occur at the widest part of the carapace and is as prominent as 

 the posterior spine. The basal antennal article slopes abruptly from the 

 slightly incurving spine to the orbit without an intervening step. 



The above are the species within its Peruvian range from which 

 Microphrys aculeatus needs to be distinguished. In the Galapagan por- 

 tion of its range M. triangulatus occurs, M. weddelli being absent. 



Microphrys platysoma (Stimpson) 

 Plate W, Fig. 5 ; Plate 43, Fig. 3 

 Milnia platysoma Stimpson, 1860b, p. 180. 



Microphrys platysoma, A. Milne Edwards, 1875, p. 62. Streets and 

 Kingsley, 1877, p. 103. Bouvier, 1895, p. 8. Rathbun, 1901, p. 72 

 (part: not the Atlantic specimens); 1910, pp. 535, 574, pi. 

 50, fig. 3 (part: not the Peruvian or Galapagos specimens) ; 1924c, 

 p. 379; 1925, p. 479, pi. 176, figs. 1, 2, text-fig. 140. Crane, 1937, 

 p. 63; 1947, p. 74. Steinbeck and Ricketts, 1941, p. 467, pi. 32, 

 fig. 6. Garth, 1946, p. 405, pi. 68, figs. 3, 4; 1948, p. 30. 



Pisoidesf celatus Lockington, 1877c, p. 66; type localities, La Paz, 

 Mulege Bay, Port [Puerto] Escondido, San Jose Island, all in the 

 Gulf of California ; types not extant. 



Microphrys depressa, Streets and Kingsley, 1877, p. 103. Miers, 1886, 

 p. 83. (Not Fisheria depressa Lockington.) 



Microphrys error Kingsley, 1879a, p. 145; type locality, Lower Cali- 

 fornia; male holotype not extant. Miers, 1886, p. 83. 



Microphrys platisoma, Miers, 1886, p. 83. 



Type: Holotype, of undesignated sex, length 11.2 mm, width 8.4 

 mm, originally deposited in the collections of the Smithsonian Institu- 

 tion, no longer extant. 



Type locality: Cape St. [San] Lucas, Lower California, Mexico; 

 John Xantus, collector. 



Localities subsequently reported, with collectors: Lower California, 

 Mexico: L. Diguet (Bouvier). Gulf of California: Puerto Refugio of 

 Angel de la Guarda Island, Concepcion Bay, Coronado[s] Island, San 

 Gabriel Bay and Pt. Lobos of Espiritu Santo Island, El Mogote, and 

 east of La Paz, Steinbeck and Ricketts (Steinbeck and Ricketts) ; Patos 

 Island anchorage, 4.5 fathoms, F. Baker, California Academy of Sciences 

 Expedition (Rathbun, 1924c) ; Santa Inez Bay, Zaca (Crane, 1937) ; 

 Mulege Bay, Port [Puerto] Escondido, San Jose Island, and La Paz, 



