CALIFORNIA STALK-EYED CRUSTACEA. 209 



Genus Pandalus Leach. 



Carapace smooth. Eostrum armed above aud below with, teeth and 

 continued backward upon the carapace as a carina. Second pair of pereo- 

 pods with the carpi unequal and multiarticulate. 



Type. — P. annulicornis Leach. 



Pandalus Danae St. 



Pandalus Danm Stimpson, Proc. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 

 87; Journ. Bost. Soc. Nat. Hist., Vol. VI, p. 502, PI. XXI, figs. 6 and 

 7, 1857. Cooper, Eep. Expl. and Sur. to Pac. Ocean, Vol. XII, Book 2, 

 1860, p. 389. KiNGSLEY, Bull. Essex Inst., Vol. X, 1878, p. 64. 

 Smith, Rep. Prog. Geol. Sur. Canada, 1878-9, B, p. 214. Eathbun, 

 E., The Fisheries of the U. S., Sec. 1, 1884, p. 821. Sharp, Proc. 

 Acad. Nat. Sci. Phila., 1893, p. 115. 



Rostrum slender, about as long as the carapace and quite strongly- 

 upturned; upper margin armed with 10-12 sharp teeth, the posterior five of 

 which are on the carapace, the last one a little behind the middle, the 

 anterior half of the upper margin of the rostrum smooth; apex trifid; 

 lower margin armed with six or seven teeth which decrease in size ante- 

 riorly, the posterior tooth large and curved strongly forwards. Subocular 

 spine well developed; antennal spine small. The appendage on the outer 

 side of the basal joint of the antennules is small, lamellate, rounded at 

 the tip and not reaching as far as the middle of the joint; inner flagellum 

 longer than the outer one. Antennal scale narrow, tapering, not nearly 

 so long as the rostrum; two spines on the outer side of the second joint 

 of the peduncle; flagellum longer than the body. The maxillipeds do not 

 reach the tip of the rostrum and may fall short of or exceed the tip of the 

 acicle. First pair of legs shorter than the maxillipeds, the merus pro- 

 duced forwards at the infero-distal angle into a spine. Second pair elon- 

 gated, very unequal, the longer member with a sharp crest on the infero- 

 proximal portion of the ischium; the merus and distal end of the ischium 

 are closely annulated; carpus very long, slender, divided into very 

 numerous annulations and channeled along one side; hand oblong, nar- 

 row, the fingers scarcely as long as the palm; the shorter cheliped is vari- 

 able in length, exceeding or not equalling the tip of the rostrum; the 

 ischium is not distally annulated and the merus is obscurely annulated, 

 but the annulations of the carpus are distinct; hand similar to that of the 

 longer cheliped. The three following pairs of legs are spinous and rather 

 stout, decreasing in length posteriorly, the dactyls short and spinulous 

 below. The postero-lateral angle of the fifth abdominal segment is 

 rounded, but furnished with a minute tooth; that of the fifth segment 

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