154 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 18 



Partida, Angel de la Guardia Island, Angeles Bay, Los Coronados 

 Islands, all in the Gulf of California, and from Secas Island, Panama. 

 The complete list of station numbers is : 



The bathymetric range was from 10 to 100 fathoms. 



The report from Secas Island, Panama, at 7°57'35" N. Latitude 

 82°01'35" W. Longitude constitutes the first record of the species out- 

 side the Gulf of California. 



Discussion: This species is very closely allied with P. cervicornis. 

 Glassel (1937) stated, "These two species, P. varians, and P. cervi- 

 cornis, may prove to be one and the same species, one a variety of the 

 other, when it is possible to get a large series of adult forms from both 

 ends of the Gulf of California together for comparison. There seems to 

 be an intergradation which is difficult otherwise to explain." 



There exists, indeed, a high degree of intergradation, largely due to 

 the great amount of individual variation in the appropriately named 

 P. varians. Of the characters used in Benedict's description (Glassell did 

 not redescribe the species), only one, the type of granules on the major 

 cheliped, was found to be constant for the differentiation of the two 

 forms. 



These unique granules, along with the distinctive shapes of the telson, 

 which also proved to be unvarying, provide characters clearly indicating 

 that these are distinct species and afford a quick method of identifying 

 each. 



Remarks: The common carcinoecium of this form is a gastropod 

 shell completely overgrown with a hydrocoral which forms several medial 

 and long upswept lateral spines described by Benedict as "branches not 

 unlike the horns of a deer." This is probably the "Bryozoan"-encrusted 

 shell mentioned by Bouvier (1898) and Glassell (1937) as the habitat 

 of this species. 



Pylopagurus cervicornis (Benedict) 



1892 Eupagurus cervicornis Benedict, Proc. USNM 15 (887) p. 25. 

 1937 Pylopagurus cervicornis, Glassell, Zoologica 22 (3) p. 253. 



Type: Syntypes, U.S.N. M. catalogue number 16700, off Cape San 

 Lucas, Gulf of California. 



