THE SPIDER CRABS OF AMERICA 405 



besides two on the antenna! segment. Antero-lateral projections 

 four, all acute and spiniform in the younger specimens, but in the old, 

 the first or hepatic spine becomes a large tubercle, and the next 

 spine becomes blunt. In the old there are two faint epigastric 

 tubercles near together, two distant, protogastric tubercles, also 

 faint, three of the same on the cardiac region forming a triangle 

 pointing backward; a tubercle above the base of each leg of the last 

 pair; two stronger, postlateral tubercles, one above the other, which 

 is marginal. In the young and in some larger specimens also, the 

 carapace is much rougher, showing numerous flattened tubercles or 

 granules on the dorsal surface, a spinule in each antero-lateral 

 intei-space, while a spine takes the place of the postlateral marginal 

 tubercle. 



Chelipeds in the old male much longer and stouter than the legs; 

 outer margin of merus armed with six or seven spines, inner margin 

 with two tubercles; upper surface with three tubercles; carpus 

 nearly smooth, two or three obscure denticles on in- 

 ner margin, and in undeveloped specimens two dorsal 

 tubercles near proximal end; palms smooth, widening 

 distally; fingers gaping. 



Legs with two rows of spines on merus and carpus. 



Color. — A rich, dark crunson. 



Measurements. — Large male (Geneva Museum), 

 entire length of carapace 23, width without spines ^'l^^^^^;^^::^, 

 25.2, with spines 28.2 mm. Largest carapace (2101), (19953), basal aeti- 

 entire length 29.4, width without spines 34.4, with J^^ °' antenna, 

 spines 38 mm. 



Range. — Brazil, from Bay of Bahia to Rio de Janeiro. 



Material examined. — 



Mar Grande, Bay of Bahia, Brazil; 1876-1877; Richard Rathbun, 

 Hartt Explorations; 1 male holotype (19952). 



Mamanguape stone reef, Brazil; June 20, 1899; A. W. Greeley, 

 collector; Branner-Agassiz Exped.; 1 young (25755). 



Pernambuco stone reef at Ilhade Nogueira; A. W. Greeley, collector; 

 Branner-Agassiz Exped.; 1 young (M. C. Z.). 



Rio Formoso, Pernambuco; 1876-1877; Richard Rathbun, Hartt 

 Explorations; 1 male, 3 females (19953). 



Maceio coral reef, Alagoas, Brazil; A. W. Greeley, collector; 

 Branner-Agassiz Exped.: July 22, 1899; 1 male (25757). July 23 

 and August 3, 1899; 2 young (25756). 



Brazil; A. W. Greeley, collector; 1 female (25758). Rio de 

 Janeiro; 1 large male (Geneva Mus.). 



Locality not known; 1 carapace, very large (2101, M. C. Z.). 



5487— 25 1 28 



