No. 10 garth: brachyuran fauna of the galapagos 359 



Range. — Mexico to Peru (Coker) ; Galapagos Islands (Bell). 



Diagnosis. — Front bidentate. Carapace with single intestinal, double 

 hepatic, and single subhepatic protuberances; carapace and chelipeds 

 coarsely granulate. Sixth segment of male abdomen protruding backward 

 over fifth. 



Material exarnined. — None from the Galapagos Islands. The Han- 

 cock collections contain several specimens of this species from Sechura 

 Bay, Peru. 



Genus RANDALLIA Stimpson, 1857 



Randallia agariclas Rathbun 



Plate 62, Fig. 2 



Randallia agaricias Rathbun, Proc. U.S. Nat. Mus., vol. 21, p. 614, pi. 

 44, figs. 7 and 7a, 1898; Bull. 166, U.S. Nat. Mus., p. 178, pi. 50, 

 figs. 3 and 4, text fig. 40, 1937. 



Type locality. — Off Cape San Lucas, Lower California, 31 fms. 

 Type.— USNM No. 21601. 



Range. — From Thurloe Bay, Lower California (Velero III), to La 

 Libertad, Ecuador (Velero III) ; Galapagos Islands (Velero III). 



Diagnosis. — Carapace subglobular, a deep pit on either side of median 

 ridge, 4 lobes on posterior border. Frontal margin with a blunt outer 

 tooth. Dorsal tubercles mushroomlike, those of sternum and abdomen 

 beadlike. 



Material examined (2 specimens from as many stations). — 

 186-34. Cartago Bay, Albemarle Island, 32 fms, Jan. 25, 1934, 1 male 



(photographed) (USNM No. 69298). 

 187-34. Cartago Bay, Albemarle Island, 8-10 fms, Jan. 25, 1934, 1 

 male (USNM No. 69303). 

 Measurements. — Male specimen : length 6.3 mm, width 6.5 mm. 

 Habitat. — Sand and nullipore, sand and rock. 

 Depth. — 3-55 fms. 



Remarks. — ^The extreme northern and southern records of the occur- 

 rence of the species along the mainland coast of the Americas, as well as 

 the Galapagos record, are the results of the work of Hancock Expedition 

 collectors. 



R. agaricias is now recognized as a member of the Galapagan fauna. 



