THE CANCROID CRABS OF AMERICA 245 



Description. — Carapace about three-fourths as long as broad, thick, 

 convex, covered with a short pubescence easily rubbed off; regions not 

 defined; an anterior median furrow, also a furrow separating the front 

 from orbital angle; antero-lateral margins almost entire, three lobes 

 faintly discernible. Front about one-third width of carapace, bimar-^ 

 ginate, margin convex, median notch small, external angle not pro- 

 jecting. Eyes very short and stout. Antennal flagellum shorter than 

 greatest diameter of orbit. Chelipeds less unequal than in P. longi- 

 mana, the smaller hand not so slender, about half the width of larger. 

 Smaller wrist similar in shape to larger and with an inner tooth. The 

 black color of thumb runs back a little on the hand, forming a convex 

 outline. Otherwise resembling P. longimana. 



Color. — Carapace dark brown, chelipeds dark reddish, fingers black 

 greater hand with one or two white spots on outer side between bases 

 of fingers. (Stimpson.) 



Measurements. — Male (24862), length of carapace 5.2, width"^{8 

 mm. Female (58008), length of carapace 4.3, width 

 6.3 mm. 



Range. — Florida Keys and West Indies to north 

 coast of South America; Bermudas. 



Material examined. — Key West, Florida; H. E. 

 Webster; received from Boston Society of Natural 

 History; 1 ovigerous female (56828). 



Off Southeast lighthouse dock, Loggerhead Key, 

 Tortugas, Florida; June 14, 1925; Valentine and 

 Chester; 1 female (62550); gift of Carnegie Institu- 

 tion. 



Cabanas, Cuba; sand, shell, grass to mud bottom; 

 June 8-9, 1914; station 16; Henderson and Bartsch, ., ,„ „ 



^^ x' IGURK ao. — i AliALIO* 



Tomas5arrera Expedition; 1 ovigerous female (48925), mera dispar, male 

 poisoned wdth copper sulphate on reef. ^^^f^' ^b°omen, 



Jamaica; P. W. Jar vis; 1 ovigerous female (20507). 



Haiti; near the Caimites; April, 1865; P. R. Uhler; 1 female 

 (2380, M.C.Z.). 



On lighthouse reef, Arroyo, Porto Rico; February 3, 1899; FisJi 

 Hawk; 1 male, 1 young female (24254). 



Pillars of Hercules, Antigua; 1918; Barbados- Antigua Expedition, 

 State University of Iowa; 1 female (S.U.I.). 



Barbados: 1918; Barbados- Antigua Expedition, State University 

 of Iowa: One mile south of station 19, off Needham Point; 84 

 fathoms; rocky; station 20; 2 males, 4 females (2 ovigerous) (S.U.I.). 

 Olira Reef; May 13; 3 males, 14 females (7 ovigerous) (58008). 

 May 15; 6 males, 21 females (8 ovigerous) (S.U.I.) . On old coral; 

 May 31; 3 males, 13 females, 2 young (S.U.I. ). On old coral heads; 

 June 4; 4 males, 4 females (S.U.I. ). 



