216 BULLETIN 120, UNITED STATES NATIONAL MUSEUM 



Measurements.— Male (467i)3), length of carapace to base of horns 

 21.9, length including horns 41.5, width of carapace excluding spines 

 15.4, including spines 33.2, length of cheliped 44 mm. 



Range. — Florida Straits and Caribbean Sea as far as St. Vincent 

 and Barbados. Depth, 88 to 387 fathoms. 



Material examined. — -See table, page 215. 



ROCHINIA TANNERI (Smith) 



Plate 227, fig. 1 



?Amathia modesta Stimpson, Bull. Miis. Comp. Zool., vol. 2, 1871, p. 124 

 (type-locality, off Sand Key, Florida, 120 fathoms; type not extant). 



Amathia tanneri Smith, Proc. U. S. Nat. Mus., vol. 6, 1883, p. 4 (type- 

 locality, off Delaware Bay, 130 fathoms; holotype. Cat. No. 18915, U. S. 

 N. M.). 



lAnamathia modesta Smith, Proc. U. S. Nat. Mus., vol. 7, 1884 (1885), 

 p. 493. 



Anamathia tanneri Smith, Proc. U. S. Nat. Mus., vol. 7, 1884 (1885), p. 493; 

 Rept. U. S. Commr. of Fish and Fisheries for 1885 (1886), p. 626 [22], 

 pi. 1, fig. 4. — Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 

 1898, p. 254. 



Diagnosis. — Median spines 4; gastric spines 4; spines of carapace 

 short and stout, of rostrum long; one spine on basal antennal article; 

 a blunt tooth at angle of buccal cavity; a short spine at extremity 

 of merus of first ambulatory leg, a tooth on the other legs. 



Description. — Spines of carapace of the same number as in hystrix 

 but much shorter, especially the lateral gastric spines which in 

 small specimens are reduced to tubercles. Orbit less open than in 

 hystrix, the supraocular eave projecting further over the eye; pre- 

 ocular spine present. Basal antennal article with an antero-external 

 spine. Anterior angles of buccal cavity prominent with a broad 

 triangular tooth, followed by 3 or 4 blunt, conical projections on 

 the pterygostomian region. 



Chelipeds very little stouter than ambulatory legs and similar 

 to those of small specimens of R. crassa. The merus of the ambula- 

 tory legs terminates in a tuberculiform protuberance except in the 

 first leg where it is produced in a short spine. 



Measurements. — Male, station 62, S. U. I. Exped., length of cara- 

 pace from posterior margin to base of horns 21.6, total length of 

 carapace including spines 35.2, width of carapace excluding spines 15, 

 including spines 23.1 mm. 



Range. — Off Marthas Vineyard, Massachusetts, to Straits of 

 Florida. Depth, 70 to 146 fathoms. 



Material examined. — See table, page 213. 



RemarTcs. —li seems very probable that the type of Amathia mod- 

 esta was a specimen of R. tanneri with the lateral gastric spines sup- 

 pressed. If this could be proved, the name modesta would take pre- 

 cedence of tanneri. 



