THE SPIDER CRABS OF AMERICA 325 



row are smaller and may be further forward than the other 3. Four 

 median spines on the posterior half, of which one is genital, 2 cardiac, 

 and 1 intestinal; 8 spines in 3 subparallel rows on the brancliial 

 region, of which 2 small arc in an almost longitudinal row near the 

 cardiac region, 4 form an irregular oblique line at the summit (the 

 hinder 1 may be absent or obsolescent), while 2 are further forward. 

 One small spine at middle of hepatic region. Pterygostomian region 

 armed with 2 large spines, the anterior much the longer; one stout 

 spine or tubercle at angle of buccal cavity and one further foi-ward 

 close to the basal antennal segment; this segment has 2 tubercles or 

 lobes on its outer margin. 



Measurements. —M&le (?), type, length 68 mm., width 58 mm. 

 (Brito Capello). Female, mature (47833), total length of carapace 

 50.4, width including spines 50, excluding spines 44.2 mm. 



Range.— Breizil: States of Rio de Janeiro and Sao Paulo. 



Material examined. — Terra de Masahe, State of Rio de Janeiro; 

 January, 1912; E. Garbe; received from Mus. Paulista through H. 

 von Ihering; 1 female (47833). 



Santos, State of Sao Paulo; 1902; Mus. Paulista; 1 young male, 

 returned to sender. 



Iguape, State of Sao Paulo; 1902; R. Krone; received from Mus. 

 Paulista, through H. von Ihering; 1 young male (47855). 



LIBINIA SPINOSA Milne Edwards 



Plates 120 and 121 



Libinia spinosa Milne Edwards, in Gu^rin, Icon. Regne Anim , Crust., 

 pi. 9, figs. 3-36; Hist. Nat. Crust., vol. 1, 1834, p. 301 (type-locality, "les 

 cotes du Bresil;" type in Paris Mus.). — Lagerberg, Schwed. Siidpolar 

 Exped., 1901-1903, vol. 5, Lief. 7, Anom. u. Brach., 1905, p. 21. 



Libinia espinosa [error for spinosa] Guerin, La Sagra's Hist, Cuba, part 2, 

 vol. 7, 1856, Crust., p. xii. 



Libidoclaea brasiliensis Heller, Crust. Reise Novara, 1865, p. 1, pi. 1, figs. 

 1 and la (type-locality, Rio de Janeiro; type in Vienna Mus.). 



Diagnosis. — ^Median tubercles 7, gastric tubercles 7, lateral mar- 

 ginal spines 4. A straight row of 4 spines between the posterior 

 cardiac spine or tubercle and the postero-lateral marginal spine. 



Description. — Carapace in the large male orbicular, save for the 

 rostrum and broader than long without rostrum. Marginal spines 

 short, dorsal protuberances rather high tubercles;, all are densely 

 granulated and bare at the summit. Median tubercles 7, 3 gastric, 

 1 genital, 2 cardiac, and 1 intestinal, the last the most conical and 

 spiniform. Marginal spines 4, the first of which is situated well on 

 the hepatic region. Protogastric spines 2 (paired), situated one 

 obliquely behind the other and nearer the median line, the interval 

 between them being opposite the anterior median tubercle. Dorsal 

 branchial spines 4; two of these form a straight, oblique line with 



