324 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



Streets. In the Port of Silan female, the median spines and the two 

 innermost branchial spines are reduced to tubercles. 



Relationships. — Nearly allied to duhia but has 2 more dorsal spines 

 (paired), one hepatic, the other forming the anterior end of the 

 branchial rhomb. The posterior end of the supraocular eave forms 

 a spine pointing sideways where it overlaps the postocular cup. 



Measurements. — Large male (48671), total length of carapace 90.3 

 mm., width including spines 83 mm., width excluding spines 73.1 

 mm. Type female (Mus. Phila.), total length of carapace 80.7, 

 median length 78, width without spines 65 mm. 



Range. — Western Cuba; Yucatan. 



Material examined. — 



Havana, Cuba; 1871; Ramon M. Forns; 1 male, 1 female (2076, 

 2077, M. C. Z.). 



Santa Lucia, Cuba; May, 1914; Plenderson and Bartsch, Tomas 

 Barrera Exped.; 1 female (47919). 



Cape Cajon, Cuba; from traps; 1914; Henderson and Bartsch, 

 Tomas Barrera Exped.; 1 female (48671). 



Cuba; N. H. Bishop; received from Boston Soc. Nat. Hist.; 1 male 

 (53050). 



Cuba; Guerin's collection; T. B. Wilson; 1 male and cast shell 

 (Phila. Acad.); labeled "inflata Sts" and is perhaps type of infiata. 



Cuba; Gundlach; 3 specimens labeled "L. distincta Guerin" 

 (Berlin Mus.). 



Off Merida, Yucatan, Mexico; A. Schott; 1 male (2169). Port of 

 Silan, Yucatan; 1 adult feinale (Cat. No. 772, Mus. Phila. Acad. 

 Nat. Sci.) 



"East Indies"; locality probably an error; T. B. Wilson; 1 female, 

 holotype (Phila. Acad.). 



LIBINIA FERREIRAE Brito Capello 



Plates 118 and 119; plate 245, figs. 4 and 5 



Libinia ferreirae Brito Capello, Jorn. Sci. Lisboa, vol. 3, No. 12, 1871, 

 p. 262, pi. 3, figs. 1, la (type-locality, Brazil "provavelmente;" type in 

 Lisbon Mus.). 



Libinia gibbosa A. Milne Edwards, Crust. R6g. Mex., 1878, p. 131 (type- 

 locality, Desterro, Brazil; type in Paris Mus.). 



Diagnosis. — Median spines 6; branchial spines 7 or 8, in 3 rows; 

 1 supero-hepatic spine. 



Description. — Carapace orbicular, except for the frontal region, and 

 very convex. Length of preorbital portion between one-fifth and 

 one-sixth of the remaining length. Rostral horns short and very 

 divergent. Five large lateral spines, conical, acute. Dorsal surface 

 well spined and tuberculate. On the gastric region, 5 sharp tubercles 

 in a row and one median, farther back; the intermediate pair of the 



