THE FOSSIL STALK-EYED CKUSTACEA 105 



and similar ; in D. arnoldi the same may be true, as the movable finger 

 of the right cheliped, which in this genus is the smaller, has the ap- 

 pearance of a major dactylus. 



Genus PAGURUS Fabricius 



Pagvrvs Fabricius, Syst. Entom., 1775, p. 410 ; type, P. Dernhardus (Lin- 

 naeus). . , 

 Chelipeds usually dissimilar and unequal, the right being much 

 the larger; very rarely subequal. Fourth pair of legs subchelate. 

 Outer maxillipeds widely separated at base. No paired appendages 

 except the uropods, on the abdomen of either sex. 

 Pleistocene; Recent. 



PAGURUS GRANOSIMANUS (Stimpson) 



Eupagurus granosimanus Stimpson, Ann. Lye. Nat. Hist. New Torlf, vol. 



7, 1862, p. 90. 

 Pagurus granosimanus Schmitt, Univ. California Publ. Zool., vol. 23, 1921, 



p. 141, text-fig. 91 and synonymy. 



DescHption.—T\\Q&% specimens agree with Recent ones of this to- 

 day widely distributed species (Unalaska to Lower California). 

 Surface covered with rather closely placed, slightly foi-ward-point- 

 ing granules, with some smaller granules in the interstices. The 

 granules of the outer marginal row are larger and have the appear- 

 ance of thick, blunt serrations. 



(9 ccwn-ewce.— California ; Pleistocene: 



Nob Hill (lumber yard), northeast of San Pedro; lower San 

 Pedro formation; one right immovable finger; Cat. No. 353353, 



U.S.N.M. -, . • u. 



Deadman Island, southeast of San Pedro; one propodus ot right 



cheliped. 



Superfamily THALASSINIDEA Ortmann 

 Family CALLIANASSIDAE Bate 



Body shrimplike. Abdomen extended ; abdominal pleura small or 

 absent; tail-fan well developed and adapted for swimming. First 

 pair of legs unequal or subequal, perfectly or imperfectly chelate; 

 third and fourth pairs simple, others variable. Antennal peduncle 

 five-jointed; antennal scale quite vestigial; no antennal thorn. 



Genus CALLIANASSA Leach 



Callianassa Leach, Edin. Eneyc., vol. 7, 1814, p. 400; type, C. suhterranea 

 (Montagu). 

 First pair of le^s very unequal, with well developed, much com- 

 pressed chelae; second pair small and chelate; fifth pair subchelate. 



