176 CALIFORNIA ACADEMY OF SCIENCES. 



Crangon munitellus Walker. 



Crangon munitellus WALKER, Trans. Liverpool Biol. Soc., Vol. XII, 1898, 

 p. 275, PI. XVI, fig. 1. 



Body stout. Rostrum concave above and rounded at the tip. Carapace 

 with a median carina with two teeth, and two short, parallel carinae on 

 either side terminating anteriorly in a tooth. Antenual acicle short and 

 broad, with a strong central rib. Abdomen abruptly contracted at the 

 fourth segment; "sixth segment darker colored than the others; a dark, 

 transverse band on the caudal appendages. 



"Length 25 mm." 



"Near C. munitus Dana, but differs in its much smaller 

 size and in the second carina from the median termi- 

 nating in a tooth half-way to the orbital margin, while 

 in C. munitus it reaches the margin and has no tooth." 



Puget Sound. 



Genus Paracrangon Dana. 



Rostrum elongate; eyes free. Second pair of pereopods wholly absent; 

 fourth and 'fifth pairs acuminate, gressorial. 



Type. P. echinatus 



Paracrangon echinatus Dana. 



Paracrangon echinatus DANA, Proc. Acad. Nat. Sci. Phila., 1852, p. 20,; 

 Crust. U. S. Expl. Expd., Part 1, 1852, p. 538, PI. XXXIH, fig. 6. 

 STIMPSON, Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 497. KINGS- 

 LEY, Bull. Essex Inst., Vol. X, 1878, p. 55. WHITEAVES, Can. Nat. 

 (2), Vol. VIII, 1878, p. 471. SMITH, Rep. Prog. Geol. Sur. Canada, 

 1878-9, 5, p. 212. FAXON, Mem. Mus. Comp. Zool. Harvard Coll., 

 Vol. XVIII, 1895, p. 131. ORTMANN, Proc. Acad. Nat. Sci. Phila., 

 1895, p. 189. 



"Beak elongate, obliquely porrect, bidentate at apex, unidentate above 

 near middle, at base below in front a long curved spine. Carapax mul- 

 tispinous, along middle of back unequally four-toothed, either side 5-7 

 spinous. Abdomen above partly keeled, somewhat sculptured, sides 

 acute. Hand elongate, immovable finger long and very slender. Fourth 

 and fifth pairs of legs nearly naked, subequal. 



Length of body, one and three-fourths inches. Length of beak half as 

 long as carapax or rather longer than the line of it along the back. The 



