CALIFORNIA STALK-EYED CRUSTACEA. 41 



nearly equals the breadth than in the larger ones. In 

 one case the length and breadth were each 32 mm., but 

 in no case was a specimen longer than broad. 



Deep water from Behring Sea to southern California; 

 29 to 1,625 fathoms (Miss Rathbun). 



This and preceding species seen and compared. 



Genus Scyra Dana. 



Carapace subpyriform, tuberculated, but not spinose. Kostrum com- 

 posed of two flattened horus. Orbits small, with a fissure above and 

 below, the lower and sometimes the upper one being open. Preorbital 

 spine present. Basal antennal joint rather narrow, with a small spine at 

 the antero-exterual angle, the two following joints compressed and not 

 concealed by the rostrum. Merus of the maxillipeds distally truncated. 

 Chelipeds in the male well developed, the hand compressed and carinated 

 above; fuigers acute. Legs moderately long, subcylindrical, the first pair 

 not greatly exceeding the others in length; dactyls short and acute. 

 Abdomen seven-jointed. 



Type. — S. acutifrons Dana. 



Scyra acutifrons Dana. 



Scyra acutifrons Dana, Am. Journ.:Sci. (2), Vol. XI, 1851, p. 269; Crust. 



U. S. Expl. Expd., Part I, 1852, p. 95, PI. II, fig. 2. Stimpson, Journ. 



Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 455. Lockington, Proc. Cal. 



Acad. Sci., Vol. VII, 1877, p. 69. Miers, Journ. Linn. Soc. London, 



Vol. XIV, 1879, p. 663; Challenger Keports, Vol. XVII, 1886, p. 62. 



Smith, Kep. Prog. Geol. Surv. Canada, 1878-9, B, p. 210. Kathbun M., 



Proc. U. S. Nat. Mus., Vol. XVI, 1893, p. 88. Newcombe, Bull. Nat. 



Hist. Soc. Brit. Col., 1893, p. 21. 

 Scyra (sp. undet.) Whiteaves, Can. Nat. (2), Vol. VIII, p. 471; (see Smith 



1. c). 



Carapace pyriform and furnished with rounded tubercles. Median 

 region tumid and separated from the cardiac and branchial regions by a 

 conspicuous depression; an acute tubercle near the center of the median 

 region, behind which is a larger and more obtuse tubercle. Branchial 

 regions tumid and bearing a large, projecting tubercle, in front of which 

 is an elevated prominence which may bear several small tubercles, though 

 it is often smooth. A large tubercle on the cardiac and a smaller one on 

 the intestinal region. Rostrum short, the horns ovate-lanceolate. Two 



