200 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



Measurements: Males, 3.9 to 8.5 mm; non-ovigerous females, 4.7 

 and 5.8 mm; ovigerous females, 4.8 and ca. 8.0 mm. The male holo- 

 type is 6.3 mm in length, 5.8 mm in width; an ovigerous female para- 

 type, 4.8 by 4.2 mm. 



Color: In alcohol, carapace with orange- red blotches on a cream- 

 colored ground. Propodi of ambulatories banded. Ventral surface slightly 

 iridescent. (Glassell, 1938b) 



Ecology: Porcellana hancocki has been taken in depths of 25 to 40 

 fathoms, from substrates of mud, sand, and sand and shell. Commensal- 

 ism with pagurids or other organisms has not been noted. 



Ovigerous females have been recorded for March only. 



Relationships : Porcellana hancocki is closely related to the western 

 Atlantic species P. sigsbeiana A. Milne Edwards, 1880. The latter form 

 has a notch at the cervical groove, and a lobe and spine on the an- 

 terior margin of the carpus, much like those characteristic of P. han- 

 cocki. It differs in having the walking legs proportionately much shorter 

 and stouter than in P. hancocki. P. sigsbeiana has been reported from 

 depths of 27 to 215 fathoms. 



Remarks: The holotype was given a U. S. National Museum catalog 

 number by Glassell (1938b). However, the holotype belongs to the 

 Allan Hancock Foundation and is deposited in that institution with 

 catalog number 363. The specimens recovered by the Velero III at 

 station 701-37 will be deposited in the U. S. National Museum. 



Range: Known only from three localities in the Gulf of California: 

 Bahia de los Angeles, Bahia de Santa Ines, and Arena Bank. 25 to 

 40 fathoms. 



Porcellana cancrisocialis Glassell 



Plate 38, fig. 2; text-fig. 9(2) 



Porcellana cancrisocialis Glassell, 1936, p. 292 (type locality, Punta 

 Penasco, Sonora, Gulf of California) ; 1937, p. 86. Steinbeck and 

 Ricketts, 1941, p. 458. Haig, 1957b, p. 13. 



Previous records: 

 Gulf of California. Punta Penasco, Sonora; San Felipe: S. A. Glassell 



(Glassell 1936). Estero de la Luna: J. Steinbeck and E. F. 



Ricketts (Steinbeck and Ricketts). Arena Bank: Zaca (Glassell 



1937). 

 Ecuador. 3 mi W of Cabo de Santa Elena: Askoy (Haig). 



