^%3!"'] PROCKEDINGS OF TIIK NATIONAL MUSEUM. 85 



Hyastenus diacanthus (<!»' llaaii). 



Pisa (Xaxia) diacuntha de llaau, Fauna Japoiiica, p. 9G, pi. xxiv, fig, 1, and pi. G, 1839. 

 ]\'axia (liacatiilta White, Crust. Brit. ISIus., ]>. 0, 1847. Adani.s and White, Voy. Sam- 



araug. Crust., p. 10, 1848. ' Stlnipson, Proc. Acad. Nat. Sci, Phila., ix, p. 



218, 1857. Heller, Reise Fregatte Novara, n, 3, p. 3, 1868. Aurivillius, K. fev. 



Vet.-Akad. Hand., Bd. 23, 1, p. 51, pi. ii, fig. 5, 1889. 

 Hjiasteiiits dincanihus A. Milne Edwards, Nouv. Archiv. du Mus., viii, p. 2.50, 1872. 



Miers (Cat. Crust. N. Z., ]). 9, 1876) ; Proe. Zoill. Soo. London, p. 26, 1879; Crust. 



Alert, pp. 194, 182, 1884 ; Challenger Kei)t., Zoiil. xvii, pp. .56, 57, 1886. Haswell, 



Proc. Linn. Soc. N. .S. Wales, iv, p. 442, 1879; Cat. Austral. Crust., p. 20, 1882. 



Walker, .Tour. Linn. Soe. London, xx^ i». 109, 1887. De Man, Arch. f. Natur., 



Mil, p. 220, 1887. Cano, Boll. Soc. Nat. Napoli (1). iii, ]). 178, 188ft. 

 Hyastenus rerreauxii A. Milne Edwards, loe. cit. 



Japanese seas; U. S. S. Palos; two ienuiles (10288, KiL'SO). 

 Japan; H. Loomis; three males, five females (1()273). 

 Sydney Harbor, New South Wales; William E. l.angley (5740). 

 Distributed throughout the Iii(lo-l*acifi(' region. 



Hyastenus caribbaeus, sj). nov. 

 Plate VI, Fig. 2. 



Carapace triangular-ovate, with a stout si)ine on the summit of the 

 posterior portion of the branchial region, and another on the intestinal 

 region just above the ])osterior nnirgin. Jlegious distinct. There are 

 three inconsi)icuons tubercles on the gastric, and one at the inner ang'le 

 of each branchial region, ('arapace covered with a short, close pubes- 

 cence, with scattered bunches of hair. Rostrum nearly as long as the 

 carapace, entire for about one-fourth its length ; horns slender, slightly 

 divergent; margins hairy. I'asal antcMinal Joint without a si)ine. Fla- 

 gcllum not so long as the rostrum, 



Chelipedssleiuler, unarmed; merus subeylindrical; manus long, com- 

 pressed, narrowest near the carpus, widening slightly to the base of 

 the fingers; dactyl arched, Avith a tooth near the base; fingers gaping 

 at the base when closed. And^ulatory legs very slender, the first pair 

 longer than the cheli])eds. 



Length of carapace, ex(;lusive of rostrum, 13; width, 10.5; length of 

 rostrum, 0.5; length of cheliped, about 24 millimeters. A specimen 

 with a total length of 14 millimeters has com])aratively a nnich shorter 

 rostrum and spines than the one described above. 



Sabanilla, 1 hiited States of (Colombia; IJ.-S. Fish (Jommission steamer 

 Albatross, 1884; two males (10315). This is the first species of Hyas- 

 tenus recorded from the Atlantic Ocean. 



Hyastenus longipes (Dana). 

 Plate vn. 

 Chorilia lonf/ipcs Dana, Amer. Jour. Sci. (2), xi, p. 269, 1851; Crust. U. S. Expl. 

 Exped., I, ]). 91, pi. 1, fig. 5, 18!52. Slimp.son, Jour. Boston Soc. Nat. Hist., VI, 

 p. 455, 1857. Lockiugton, Proc. Cal. Acad. 8<i., vii, p. 69, 1876. 

 Hyastenus (Chorilia) hnujipes Miers, Jour. I. inn. Soc. London, xiv, i>. 658, 1879; 

 Proc. Zool. Soc., London, i». 27, 1879. 



