132 CALIFORNIA ACADEMY OF SCIENCES. 



Known from two female specimens taken off Santa 

 Cruz Island, Calif., in 155 fathoms. 



There are several other species of Lithodes found 

 further north on our coast, viz., L. hrevipes, camtschati- 

 cus, cequispinus, and Gouesi. Panamensis occurs on 

 the west coast of Central America. 



Legion PAGURINEA. 



The Hermit Crabs. 



Carapace elongated, generally membranaceous behind the cervical 

 groove. Kostrum small. AbdomeD generallj'- long and unprotected by- 

 calcareous plates. First two pairs of ambulatory legs well developed, last 

 two pairs small. Last abdominal segment furnished with a pair of ap- 

 pendages. 



Species usually inhabiting the coiled shells of Mol- 

 luscs. 



Family PAGURID^. 



Antennular peduncle of moderate size, the first joint sh'ort and stout, 

 second and third slender and cylindrical; both flagella small. The ped- 

 uncle of the antenna is subcylindrical; acicle lanceolate. Gills phyllo- 

 branchiate. Abdomen soft, asymmetrical. 



Genus Pagurus Fabr. 



Front with a rostral projection. Ocular peduncles with the basal scale 

 of moderate size and wide apart. Antennal acicle slender and elongated; 

 flagellum long and naked. Chelipeds rarely subequal, the right usually 

 the larger. Fourth pair of pereopods subchelate. First and second 

 abdominal segments without genital appendages. Males without a pro- 

 truded vas deferens. 



Type. — Pagurus Bernhardus (Linn.). 



It has been recently pointed out by Mr. J. E. Bene- 

 dict ^ that the generic name Eupagurus will have to be 

 superseded by the older name Pagurus. " I believe," 



1 Ann. Nat. Hist. (6), Vol. XVIII. July, 1896, p. 99. 



