488 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



small tubercles; lateral margins of second free segment produced in 

 a few small spines; fourth segment (third free segment) about equal 

 in length to first two taken together, also covered dorsally with small 

 tubercles and with the antero-lateral angles produced in a few small 

 spines; fifth segment (fourth free segment) the longest and perfectly 

 smooth; sixth segment (fifth free segment) almost as long as the pre- 

 ceding, covered dorsally with small tubercles and with the post- 

 lateral angles produced backward in a tuberculated process on either 

 side; seventh segment (sixth free segment) not longer than and not 

 quite so wide as the abdominal segments. 



First five abdominal segments about equal in length; sixth or 

 terminal segment tapering to a narrow, pointed extremity. Outer 

 branch of uropoda shorter than the inner, which extends a little 

 beyond the extremity of the abdomen ; both are furnished with long 

 hairs. 



First pair of legs or gnathopods composed of three articles, the 

 first extremely large, the second small, and the third or terminal one 

 minute. The gnathopods form a sort of operculum covering the 

 mouth parts. The following five pairs of legs are ambulatory; 

 the third pair with a crest of four spines on the ischium at the 

 distal end. The fourth and fifth pairs of legs have a prominent 

 process at the distal extremity of the merus, carpus, and propodus 

 on the inferior margin. 



Two specimens, both males, were taken at Albatross Station 2547, 

 south of Marthas Vineyard, at a depth of 390 fathoms. 



Type.— Cat. No. 38974, U.S.N.M. 



BIBLIOGRAPHY. 



In addition to the references given in my monograph " the follow- 

 ing have been referred to in connection with this paper: 



Dollfus, Adrien. Etude preliniinaire ties Gnathiidse recueillis dans les cain- 

 pagnes de l'Hirondelle et de la Princesse-Alice. Bull. Soc. Zool. France, 

 XXVI, L901, pp. 240-244. Paris. 

 IIkssi:. Hi <;i:nk. Meinoire sur des Crustaces mres ou nouveaux des cotes de 

 France. 23 me Article: Pranzines et Ancees Nouveaux. Ann. Sci. Nat. (5), 

 XIX, 1874, 29 pp., pis. xxi-xxu. Paris. 



— . Description d'un uouve] Ancee (Anceus congeri). Revue des 

 Sciences Nat, IN'. 1876. 



Crustaces rares ou nouveaux des cotes de France. Description 



d'un nouvel •'Ancee," decrit et dessine sur des individus vivants. Ann. Sci. 



Nat. (6), XVII, ism, 11 pp.. pi. win. Paris. 

 i.i cas, EL Observations sur quelques Especes nouvelles de Crustaces du X T ord 



de ['Afrique. Ann. Soc. Ent. France, (2), VII, 1849, p. 466, pi. xv. Paris. 

 Scii. 'I'. Natural History Notes from Tarbert. Proc. Xat. Hist. Soc. Glasg. 



mi. s.), I. Inst. pp. 369-378. Glasgow. 

 WALTEB, A. Anceus (Praniza) torpedinis. Jen. Zeits. Xat., XVIII, 1885, pp. 



iir. 151. Jena. 



"Hull. U. S. National Museum, No. 54, 1!K)5. 



