90 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



PORTUNUS (ACHELOUS) BAHAMENSIS, new species 



Plates 42 and 43 



Type-locality. — The Current, Eleuthera Island, Bahamas; July 15, 

 1903; B. A. Bean; 5 males, 5 females; received from the Geographic 

 Society of Baltimore; 1 male is type, Cat. No. 31069, U.S.N.M. 



Diagnosis. — Lateral spine no longer than those in front of it. Upper 

 half of outer surface of palm without granules between the carinae. 

 Upper margin of movable finger fringed with hair. Postero-distal 

 margin of merus of swimming legs entire. 



Description. — Very close to P. (A.) depressifrons . Differs as fol- 

 lows: Antero-lateral teeth shorter, the fourth, sixth and eight teeth 

 slightly reduced; the tooth at the lateral angle of the carapace is not 

 enlarged, but is similar to the other lateral teeth. The outer orbital 

 tooth is less advanced than in the related species and does not reach 

 the line of the frontal teeth. Fronto-orbital distance greater in pro- 

 portion to carapace-width. The posterior of the two granulated 

 lines on the protogastric regions is less sinuous than in depressifrons. 

 Chelipeds narrower, teeth of merus smaller; outer surface of palm 

 just above median carina wrinkled, nongranulate. Merus of swim- 

 ming foot shorter and broader. 



Age variations. — In specimens smaller than the type the upper half 

 of the palm shows transverse rows of fine spinules in the wrinldes, and 

 in the space above there may be a single longitudinal line of scanty 

 granules or spinules. Antero-lateral teeth sharper in the young than 

 in the adult, the last or ninth tooth a little longer than the others in 

 carapaces 15 mm. wide or less. 



Color. — In alcohol the color pattern so persistent in depressifrons 

 has disappeared. There is a trace of red on the fingers especially on 

 the teeth, and a reddish spot on the condyle of the manus at the artic- 

 ulation with the dactylus. 



Measurements. — Male type (31069), length of carapace to end of 

 teeth of median pair 25, width of same 37.2, fronto-orbital width 22.1, 

 width of front between antennae 6 mm. 



Additional locality. — Bahama Bank, east of Cat Key; 3 feet; 

 John B. Henderson; 2 young (61213). 



PORTUNUS (ACHELOUS) TUBERCULATUS (Stimpson) 



Plate 44 



Achelous tubercidatus Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, 

 p. 223 [95] (t3'pe-locality. Cape St. Lucas; cotypes in Brit. Miis., M. C. Z., 

 and U.S.N.M., Cat. No 19679). 



Neptunus tuberculatus A. Milne Edwards, Crust. Reg. Mex., 1879, p. 221, pi. 39, 

 fig. 1-16. 



Portunus {Ach.) tuberculatvs Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 596. 



Diagnosis. — Carapace tuberculated, a spine at posterior angles. 

 Lateral spine very long. Merus of swimming feet unarmed. 



