22 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



Locality not given; Eocene; University of California (572) ; 

 Flagiolophus weaveri. 



.mp:xico 



San Quentin Bay, Lower California, lava beds; Pleistocene; C. R. 

 Orciitt; Cancer productus. 



SYSTEMATIC LIST 



Order DECAPODA Latreille 

 Suborder Reptantia Boas 

 Tribe BRACHYURA Latreille 



Subtribe Brachygnatha Borradaile 



Superfamily OXYRHYNCHA Dana 



Family MAJIDAE Rathbun (MAIIDAE Alcock) 



SPIDEK CKABS 



Clielipeds especially mobile, rarely much greater than tlie other 

 legs, or with fingers bent at an angle on the hand. Second article of 

 antennae well developed, generally fused with epistome and often 

 with front. Orbits usually more or less incomplete. Hooked hairs 

 almost always present. Palp of external maxillipeds articulated 

 either at summit or at antero-internal angle of merus. 



Genus PYROMAIA Stimpson 



Pi/roiiiaia Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. 109; t.vpe, 

 P. cuspidata Stimpson. — Rathbun. Bull. U. S. Nat. Mus., No. 129, 1925, 

 p. 127. 



Carapace pyriform, rough; rostrum simple. Postorbital spine 

 large, distant from orbit, tip directed forward. Palm swollen ; fin- 

 gers long, curving inward. Abdomen of female very convex, 

 unevenly tuberculate. 



Pleistocene; Recent. Not before found fossil. 



PYROMAIA TUBERCULATA (Lockington) 



Plate 1, fig. 1 



Inachus tuberctilotus Lockington, Proc. California Acad. Sci., vol. 7, 1876 



(1877), p. 30 [3]. 

 hiachoides tuberculatus Schmitt, Univ. California Publ. Zool.. vol. 23, 



1921, p. 199, text-fig. 123. 

 Pyrotnaia tuberculata Rathbun, Bull. U. S. Nat. Mus., No. 129, 1925, p. 



133, pi. 40, fig. 3, pi. 218, figs. 1-4, and s.xnonyray. 



