240 NEW GENElvA AND SrEClES OK CKAlJto— KATllbUN. 



PilumuuB goiizaleiisis. 



Ciirapace inucli broader tliaii loiiu', slr<ni,uly dcllcxcd in front, flat- 

 tened Ix'liind, ('((xei'ed with a sliorl, dense, ((»ii!;li itubescence, eaeli liair 

 lieini; re.i;nlarl.\ tapering-, acnininiite, n(»t ('iir\<Ml. When the hairs are 

 r«'nH)\«'d the onl lines of the nieso_i;as(iie rei;ion are distiin't ; lliere are 

 tliree (tr fonr spinnh's near llie antero hileral niai\u'iii; <»lher\\ise tlie 

 snrface is smoot h. I'^ronl spinnhtus and hair_\- on (he niar,i;in, wit h a 

 bi'oad U shaped sinns; (he hiteral h)bes scarcely distinct from the uh)- 

 dian, bnt less ad\'anced. Orbital margin arnu'd with small spines. 

 Anterolateral mar.uin cNcnly lonnded, Iburspined, llie spine next the 

 orbit beiny' doable, the two parts eiinally larj;*'; sec(»nd spine also 

 doable, its anterior half th(^ laii^er; all the antero lateral spines have 

 one or more a«'e«'ssory spinnles. Subhepatic and subbranchial regions 

 urannlons. Ifidi^e on the end(»stome distinct. Lowei' surface of the 

 crab with a slHuter luibescence than the up|>er. Chclii)eds very un- 

 equal, outer surface pubescent and rou^h with short spines wliicli are 

 arrauii'ed in irrej:ular lines on (he hands. Toward the tui,t;"ers and 

 lower edi^e the larue hand is naked, but ]uin(;tate and tinely uranulons 

 I'^inji.ers short, stout, and dentate on the prehensile edj^'es; dactyls 

 tuberculous above near the base. A mbulatory lei^s rather broad, hairy, 

 the carpal joints lonjiitndinally yrooNed on the outside. • 



Color in alcohol: The carapace when the hairs are removed is red, 

 mottled with pale yellowish. The haiis are yellow; the spines and 

 tinkers are brown. In addition to (lie hairs the earapaee and chelipeds 

 of many specimens are covered with nnnute al^ic. 



Dimensions: Lt'nj;th Ki, width IS millimeters. 



San Luis Gonzales Bay, March 27, 1880, TI. S. Fish Coniniission 

 steamer AJb<(fro.ss; ei<;ht males and thirteen females, four of which 

 bear eggs (17tl.">). 



This species can be distinguished from the other described west 

 American Ibrms by the following characters: J\ dcprcs.sv.s Stimi)son 

 has the carapace tlattentul ; r.'sliinpsoiiii M\cvs-~)ii((r<iiii(ttits Stimpson 

 (name i)re()ccu[)ied b\- k^timpson himsi-lf foi' an Oriental species) has a 

 tuberculate carapace, and a. prominent antero lateral margin; P. .van- 

 liixii Stimpson is a narrow species; 1\ ,sj>int> liirsiitUN (liockington) has 

 tlie front long-spined; in /*. liino,sus Smith the carapace is covered with 

 tubercles. 



Faunly POKTITNID.E. 



Neptunus (Hellenixs) iiidescens. 



This is the western representative oi' si>iiiic((ri>iis (Stimpson). It dif- 

 fers from that species in its more prominent ridges, in thc»)btuse froidal 

 tet'tli, of which the median are narrower and more produced than tln^ 

 lateial; the eight snndl anterolateral teeth are h'ss sharp and their 

 posterior margins more convex; the inner suborbital lobe is obtuse. 



