8 PROCEEDINGS OF THE CALIFORNIA 



Localities — Magdaleua Bay, west coast Lower California; La Paz, Gulf of 

 California. Apparently rare, as Mr. Fisher obtained but few siaecimens. 

 No. 44. Male and female. Magdalena Bay. VV. J. Fisher. 



Panopccus tratisversitsf Stimpson, Am. Lye. Nat. Hist., N. Y., vol. VII, p. 

 210. 

 Numerous specimens of a smalLspecies of Pnnopcp.us from Lower California 

 do not agree at all with any of the species described by S. I. Smith, in the 

 Proc. Boston Soc. Nat. Hist., vol. XII, Feb. 3, 1869, and from their transverse 

 shape and the small size of the sub-hepatic spine, may probably be the P. 

 transversas of Stimpson. As, however, I have no access to Stimpson's de- 

 scription, I think it well to subjoin a short description, as it may possibly 

 prove to be a distinct species. Front .slightly sinuate, antero-lateral teeth 

 four, the two first long and low, the last two more pointed, with the jjoints 

 turned forwards. Eight cheliped slightly the larger, both chelipeds smooth, 

 shining, whitish, except on the upper surface, where the tint deepens to a 

 reddish brown, which is the general color of the carapax. Hinder pairs of 

 legs tomentose. Two of the largest specimens measured as follows: 



.^ ^ 

 Length of carapax 0.65 0.56 



Width of carapax 0.92 0.80 



Numerous specimens were obtained in San Bartolome and Magdalena bays, 

 and Santa Maria Bay, all on the west coast of Lower California; also, at La 

 Paz, Gulf of California, where it was dredged at (so far as I can make out the 

 label, which was unfortunately torn) a depth of three fathoms. The verita- 

 ble P. Iransversus was found at Corinto, Nicaragua, by J. A. McNeil (vide S. 

 I. Smith, loc. cit.). 



No. 45. Several specimens, in spirits, from Magdalena Bay. Fisher and 

 Lockingtou, 



PanopLcus validus. S. I. Smith, Proc. Boston Soc. Nat, Hist., 1869, 273. 

 Panama and Acajutla. External opening of orbit broad and deep. 



Panopceus Bradleyi. S. I. Smith, loc. cit., 281. 

 Panama. External opening of orbit a deep notch rather than a groove. 



Pa Hopcv us planus. S. I. Smith, loc. cit., 283. 



Panama. Sub-hepatic tubercle not prominent. Antero-lateral margin with 

 four slight incisions, as in P. transversus . 



AeaTfikus spino-lursuias. Lockington, Proc. Cal. Acad. Sci., Feb. 7, 1876. 



The range of this species is much more extensive than that of most of those 

 described in the paper above refen-ed to. The first specimen obtained was 

 brought, with specimens of several other species, from San Diego; but 

 whereas most San Diego forms extend down the western coast of Lower Cali- 



