64 PROCEEDINGS OF THE CALIFORNIA 



Without type specimens of any of the European or Atlantic coast genera, 

 with abridged descriptions of many genera, and nothing but incidental al- 

 lusions to others, coupled by a reference to works inacessible io me, the task 

 of identification is a hard one, and I therefore crave indulgence if, in one or 

 two cases, a new genus has been founded where an old one would have fitted, 

 or a species has been described as new because I have not seen the descrip- 

 tion. 



The total number of species of Maioid crabs now known upon this coast. 

 including the ParlhenopidcE, two or three forms that may possibly be synony- 

 mous, and one, the locality of which is doubtful, is thirty-nine, of which 

 nineteen only are included in Stimpson's "Crustacea and Echinodermata of 

 the Pacific Coast N. A.," published in 1857. 



Eleven new species are described in this paper. 



Family MAIID^. 



Sub-fam. inachin.ze. 



1. Microrhynchus (Inachus) tuberculatus. Lockington. Proc. Cal. Acad. 



Sci. Feb. 7, 1876. 



The rostrum in this species is entire, whereas in Inachus scorpio it is emar- 

 ginate and shorter; moreover, the proportionate lengths of the second pair 

 and the carapax are rather those of Microrhynchus than of Inachus (as given by 

 Dana.) 



The present species does not appear to be very abundant, as Mr. Fisher ob- 

 tained only two specimens on the "West coast of Lower California. 



No. 1. Two specimens, male and female, dried. San Diego. Hy. Heinp- 

 hill. 



2. Chionoecdes Behringianus. Stimpson. Crust, and Echinodermata Pae. 



Shores N. A., p. 8. At 80 fathoms, off Cape Romanoff. 



fisikm. 



3. Hyas latifrons. Stimpson. Prod. Animal. Evert. Ocean, Pac. Septen., 



24. 



Like H. coarclatus but with the body shorter, wider in fi'ont, less tuberculated 

 above, and with obtuse angles; the rostrum shorter and less acute, and the 

 fissure of the superior margin of the orbit closed. 



Common in Behring's Straits. 



The Cal. Acad. Sci. possesses a single specimen of this species. 



No. la. Alaska, dried. W. J. Fisher. 



4. H. lyralus. Dana. Crust. U. S. Ex. Exp. 1, p. 86, plate 1, fig. 1. 



Stimpson. Crust, and Echi. Pac. Shores N. A., 10. 



Deep water on the coast of Oregon. 



