CALIFORNIA STALK-EYED CRUSTACEA. 67 



I have never seen this species and the description is 

 not sufficiently complete to enable one to determine 

 whether or not it belongs in the genus in which Lock- 

 ington placed it. Professor A. Milne-Edwards considers 

 it identical with Stimpson's Micropanope latimana. 

 Milne-Edwards does not mention having seen latimana, 

 and as he simply transcribes Stimpson's description it is 

 quite certain that he bases his identification solely upon 

 the descriptions of the two authors. The identification 

 is not improbably correct, but considering the brevity 

 of both the descriptions, it is somewhat unsafe to unite 

 the two species, especially since the characters mentioned 

 by Stimpson are mainly those of which Lockington says 

 nothing. 



Genus Pilumnus Leach. 



Carapace convex, little broader than long, and hairy above. Antero- 

 lateral margins regularly arcuated, shorter than the postero-lateral, and 

 armed with short spines. Front narrow, emarginate. Endostome longi- 

 tudinally carinated. Basal antennal joint short, barely reaching the 

 infero-lateral frontal process and lying under the orbit. Ambulatory legs 

 compressed, not carinated, and armed with spinules; dactyls slender, 

 nearly straight. Abdomen of the male seven- jointed. 



Pilumnus spino-hirsutus (Lock.) 



Acanthus spino-hirsutus LOCKINGTON, Proc. Gal. Acad. Sci., Vol. VII, 1877, 



pp. 32 and 102. 

 Pilumnus spino-hirsutus STREETS and KINGSLEY, Bull. Essex Inst., Vol. IX, 



1877; p. 107. KINGSLEY, Proc. Bost. Soc. Nat. Hist., Vol. XX, 1879, 



p. 154. A. MILNE-EDWARDS, Crust, in Miss. Sci. au Mex., Pt. V, p. 



278. MIERS, Challenger Eeports, Vol. XVII, 1886, p. 147. 



Carapace strongly convex, nearly smooth, but covered with stiff setae. 

 Median frontal lobes truncated, separated by a prominent notch, and 

 armed each with four or five spines; lateral lobes of the front small, sepa- 

 rated from the median lobes by a deep notch and ending in a spine. 

 Orbits with the upper, lower and outer margins armed with strong spines 

 of unequal size, the two spines at the iutero-inferior angle large and situ- 

 ated on a kind of lobe. Besides the postorbital the antero-lateral margin 

 is armed with three strong spines, and there is a small spine below the 

 margin in front of the first of these. The basal antennal joint barely 



