6 c PROCEEDINGS OF THE CALIFORNIA 



I have lately found among the Crustacea collected by Mr Fisher, two fine 

 specimens of a Libinia, from San Bartolome Baj% Lower California. They 

 are much larger than the specimens described by Randall, and without tuber- 

 cles interspersed among the si?iues. The species consist of a central dorsal 

 row of eight, the first of which is the central one of a transverse row of three 

 on the anterior portion of the gastric region. Two of the dorsal row belong 

 to the cardiac, and one to the intestinal region. Nearly in a direct trans vei'se 

 line with the first cardiac spine are two others on each branchial region; and 

 in a direct transverse line with the second cardiac spine are a blunt spine or 

 tubercle and two sj^ines on each branchial region, thus forming a row of 

 seven. Eight and left of the intestinal spine is a smill one on the posterior 

 part of each branchial region. Rostrum but slightly cleft, setose at extremity 

 and on upj^er surface, not at all deflected; ante-orbital spine much smaller 

 than post-orbital, which is broad and curved posteriorly; two spines on each 

 antero-lateral margin, and two smaller ones near together on each hepatic re- 

 gion, in a line between the anterior antero-lateral spine and the transverse 

 row on the stomach. The outermost spine of the transverse row of seven is 

 the largest. The feet are without spioes or tubercles. The largest specimen 

 measures as follows: 



M. M. 



Length of carapax 52 



Width of carapax, without measirring the spines 39 



Both the specimens are female. 



I have never seen a specimen of L. cnnallcnlata, nor Randall's specimen of 

 L. qffiniit, but it is unusual to find an Atlantic species existing unaltered at 

 such a point as San Bartolome Bay, remote both from the Isthmus of Panama 

 and from Behring's Straits, and for this reason I should not be surprised if 

 it should prove distinct, in which case I j^ropose for it the specific name 

 sefosa, on account of its setose rostrum. 



15. Micippa ovata. ne«=sp. _- Qi:i(.0 111 cV P\clvV-C P* Sa^vCs^u; c 

 Carapax ovate, trtmcate in front, front narrower than in M. hirtipes, Dana. 

 Post-orbital spine in the same line with pre-orbital, the two separated b}' a 

 triangular notch. Autero-lateVal margin with five sharp spines directed for- 

 wards, excluding the post-orbital, the lateral edge of which is elongated. 

 Upper surface of carapax arched transversely, almost semicircular in section; 

 tubercles numerous, but without spines. Chelipeds short, smooth, fingers 

 serrate at tip. Hairs sparsely scattered on hinder feet and carapax, rostrum 

 pilose, esi^ecially round the margin. 



Localities: Port Escnndido, Mulege Bay, Los Angeles Bay, San .lose Isl- 

 and, La Paz. 



r^ P 



M. M. M.ir. 



Length of carapax 21 19 



Width of carapax at third antero-lateral spine IH Ifi 



Length of first pair 19 12.5 



