148 CALIFORNIA ACADEMY OF SCIENCES. 



exceeds the eye-stalk but not by one-half the length of the last joint; 

 acicle small, much shorter than the eye-stalk, not reaching the posterior 

 third of the last joint of the peduncle. Chelipeds markedly unequal; 

 merus strongly compressed, the outer surface quadralateral, nearly smooth, 

 but marked more or less as in Samuelis; anterior portion of both lower 

 margins denticulated; a small tubercle at the lower posterior angle; carpus 

 oblong, deep, twice as long as wide, the sides flattened, the upper surface 

 convex, thickly granulated, with the edges rounded, there being no defi- 

 nite lateral margins; hand oblong, no wider than the carpus at the base, 

 but widening distally, being broadest near the base of the dactyl; upper 

 surface evenly convex and granulated like the carpus; outer edge acute; 

 dactyl shorter than the palm. Merus of the left cheliped with the outer 

 part of the lower margin spinulous; carpus with nine or ten spines on the 

 sharp upper edge, external to which is a parallel row of much smaller 

 spinules; hand much compressed, scarcely wider than the carpus, its 

 broad, outer face nearly parallel with the inner one; a groove on the upper 

 surface extending from the posterior margin nearly to the dactyl and mar- 

 gined on either side by spiny granules. Ambulatory legs slender, much 

 compressed, the carpus and propodus of the anterior pair (and especially 

 the right member) spinulous on the upper surface; dactyls spinulous 

 below, scarcely as long as the propodi and not twisted. 



Color in alcohol, bright red, the tips of the dactyls light colored. 



''California" (Benedict); Humboldt County, Calif.! 

 tq Pagurus tenuimanus (Dana). 



Bernhardus tenuimanus Dana, Proc. Acad. Nat. Sci. Phila., 1851, p. 269;. 



Crust. U. S. Expl. Expd., Part I, 1852, p. 447, PL XXVII, fig. 7. 

 Mupagurus tenuimanus Stimpson, Journ, Bost. Soc. Nat. Hist., Vol. VI, 



1857, p. 483; Proc. Acad. Nat. Sci. Phila., 1858, p. 237. Smith, Kep. 



Prog. Geol. Sur. Canada, 1878-9, B, p. 211. Benedict, Proc. U. S. 



Nat. Mus., Vol. XV, 1892, p. 1. Walker, Trans. Liverpool Biol. 



Soc, Vol. XII, 1898, p. 274. 



Carapace smooth, naked. Median process but little more prominent 

 than the lateral teeth which end in a minute spine. Eye-scales narrowly 

 oblong, subacute, channeled above, and having a minute subterminal 

 spine not visible from above. First three joints of the autennal peduncle 

 armed as in munitus; acicle rounded, the inner side pubescent, the tip 

 reaching as far as, or a little beyond the ocular peduncles; flagellum long. 

 Chelipeds very unequal; merus of the larger cheliped short, trigonous, 

 with the sides convex, the length and breadth subequal; surface more or 

 less tuberculated, especially near the supero-distal angle, which is furnished 

 with several marginal spines; extero-distal angle with a few spines; carpus 



