COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 217 



zone, concealed beneath stones. On a few occasions specimens were re- 

 covered from coral by Hancock Expeditions members. 



No ovigerous females were taken in December, January, February, 

 and March, the only months in which the species was collected. 



Remarks: The U. S. National Museum paratype is a male, not a fe- 

 male as stated in the first paragraph of the original description (Glas- 

 sell, 1936, p. 286). In paragraph 7 of the description this paratype is 

 correctly noted as a male. 



Megalobrachium smithi is often found in association with M. sinui- 

 manus (Lockington) . As noted by Glassell ( 1936), Lockington evidently 

 had specimens of 71/. smithi but believed them to be variations of his 

 M. sinutmanus. 



Range: Restricted to the Gulf of California, from Punta Penasco 

 south to Isla Espiritu Santo. 



Megalobrachium sinuimanus (Lockington)^ 

 Plate 16, fig. 6; plate 39, fig. 3 



Petrolisthes (Pisosoma) sinuimanus Lockington, 1878, pp. 396, 401 

 (type localities. La Paz and Puerto Escondido, Gulf of California). 



Pisosoma sinui?nanus, Glassell, 1937, p. 83. 



Pisonella sinuimanus, Glassell, 1938a, p. 437, pi. 34, fig. 2 (neotype 

 designated ; neotype locality, Puerto Escondido, Gulf of Cali- 

 fornia). Steinbeck and Ricketts, 1941, p. 457. 



Megalobrachium sinuimanus, Chace, 1942, p. 100. 



Not Petrolisthes sinuimanus, Nobili, 1901b, p. 15; Rathbun, 1910, p. 

 599. 



Previous records: Gulf of California. NE end Isla Tiburon: S. A. 

 Glassell (Glassell 1938a). Puerto Escondido: (Lockington); S. A. 

 Glassell (Glassell 1938a) ; J. Steinbeck and E. F. Ricketts (Steinbeck 

 and Ricketts). Punta Lobos; Bahia San Gabriel, Isla Espiritu Santo: 

 J. Steinbeck and E. F. Ricketts (Steinbeck and Ricketts). La Paz: 

 (Lockington). Off Arena Bank: W. Beebe on Zaca (Glassell 1937). 



Lectotype: Female, 4.0 mm in length by 4.4 mm in width, in Paris 

 Museum, labelled "Pachycheles rotundus Lockington. Calif ornie — Lock- 



^ The International Rules of Zoological Nomenclature do not specify whether a 

 compound noun when used as a specific name should be treated as a noun or as an 

 adjective. The name sinuimanus is here considered a noun in apposition to the 

 generic name. 



