THE SPIDER CRABS OF AMERICA 347 



Range. — Gulf of Mexico; Central America; Porto Rico; Curacao. 

 Shallow waters to 27 fathoms. 



Material examined. — See table, page 346. 



HEMUS ANALOGUS Rathbun 



Plate 124, figs. 2 and 3 



Hemus analogus Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 573 

 (type-locality, southern part of Gulf of California, 10 fatlioms; holotype, 

 Cat. No. 21573, U.S.N. M.). 



Diagnosis. — Tips of rostrum almost contiguous. Cardiac promi- 

 nence large, embracing part of the branchial regions and of the 

 intestinal region. Margins of merus joints of legs distinctly dentic- 

 ulate. 



Description. — Differs from H. cristulipes as follows: Carapace 

 higher at the cardiac region, sloping more abruptly down toward 

 front. The cardiac prominence is larger, embracing a considerable 

 part of the branchial regions and of the intestinal region. Granula- 

 tion sharper. Side margins of rostrum convex; terminal teeth nearer 

 together. Preorbital angle rounded, sides rectangular. Outer mar- 

 gin of the first movable joint of the antenna more oblique and crenu- 

 late. Merus of legs narrower, their marginal denticles stronger. 



Measurements. — Female holotype, length of carapace 8.2, width 

 6.5 mm. 



Range. — Gulf of California. 



Material examined. — Southern part of Gulf of California; lat. 24° 

 11' 30" N.; long. 109° 55' 00" W.; 10 fathoms; Sh.; April 30, 1888; 

 station 2828, Albatross; 1 adult female, holotype, 1 immature female 

 (21573). 



.Genus THOE Bell 



Thoe Bell, Proc. Zool. Soc. London, vol. 3, 1835 (1836), p. 170; type, 



T. erosa Bell. 

 Platypes Lockington, Proc. California Acad. Sci., vol. 7, 1876 (1877), p. 



41 [1]; type, P. edentata Lockington. 



Carapace of moderate width, thick, lobulate; fronto-orbital region 

 wide; rostrum small; no preorbital spine; orbital border unarmed. 

 Basal article of antenna large; next article rather fiat and attached 

 to first joint near rostrum, but at a great distance from orbit. Exog- 

 nath of outer maxillipeds very wide in middle. Sternal plastron 

 almost circular. Chelipeds long and usually strong; hand com- 

 pressed; fingers spoon-shaped, gaping in the adult. Ambulatory legs 

 wide, decreasing rapidly in length from the first to the fourth; merus 

 joints with longitudinal crests; last two joints short and nodose. 



An American genus, ranging from the Florida Keys to the West 

 Indies and from the Gulf of California, Mexico, to Ecuador and the 

 Galapagos Islands. 



