1804. PBOCmWINGS OF THE NATIONAL MrSEFM. 71 



PUGP:TTIA RICl III, ] > a u u . 



PmicHiariclin, Daxa, op. cit., i, p. US, pi. 4, lii;-. 1. — Srnir.'-iox, op. c'lt., p. 457. — 

 LocKiNGTON, lor. cit. — MiKRS, loc. cit. 



Tliis .species is not larger tbau r.gracilis, and in adult specimens the 

 hands and fingers do not (lifter in the two species. P. ricJiii is, liowever, 

 readily distinguislied by tlie bilobate lateral expansion, the x>osterior 

 lobe of which is slender and almost transverse, and the anterior lobe 

 more transverse than in P. (jracilis. The merus has a few irregular teeth 

 above instead of the prominent carina of P. f/racilis. Car])us with a single 

 carina above and one on the inner margin, and between them but a 

 slight trace of the diagonal ridge so jn-ominent in F. gracilis. Ambula- 

 tory legs more slender and cylindrical than in P. (/raeilis. 



Localities. 

 Britisli Cohunbia 



Bai'clay .Soniid; U. 8. Fish Coimnission (15.'>72). 



Victoria; Dr. V. F. Ncwcoinbe. 

 California: 



Moiitorcy Bay; IT. S. Fish Commission (15573). 



Monterey; IT. Hemphill (2276); 1). S. Jordan (305S). 



tSan Diego; Rosa Smith (147G5). 



I'UGETTIA QT'ADRIDENS, (de TIaa n). 



Pisa (Minoiliiiis) (]uadride7is, Dk IIa.\n, Fanna J;i))on., (!rnst., ]>. !t7, pi. xxiv, fig. 



2, male, and pi. G, 1850. 

 J'i>:<i {Menaihius) incisiis, TtK IIaan, oj». cit., p. 08, pi. xxiv, lii;. 3, IVmale, and 



pi. G. 

 Memvihiiis quadridens, Adams and AVhite, Voy. Samarnng, Crust., p 20, 1848. 

 Mcnailiiits iiicisns, Adams and AVhitk, loc. cit, 

 Fvfjettia qiuidridois, Stimpson, Proc. Aead. Nat. Sei. Phila., IX, p. 219, 1857. — 



MiERS, Proc. Zool. Soc. London, p. 23, 1879; Challenger Rept., Zool., xvii, 



p. 40, 188G. 

 rugeitia ineisa, Stimpsox, Joe. cit. — Miers, loc. cit. 



After careful study of a large series of specimens of this genus 

 from Japan I find it necessary to unite I)e Ilaan's two species. There 

 are specimens in the collection as distinct as those figured by De Ilaau. 

 In a lot of four examples from Yokohama Bay three represent the typ- 

 ical P. incisa, while one has the hepatic expansion more projecting and 

 more concave on the margin. liev. U. Loomis has recent!}^ presented 

 to the Museum GO dried specimens from Japan, exact locality not given. 

 Of these about 25 have the strongly produced lateral expansion with 

 a deep siinis separating the postorbital tooth from the sharp posterior 

 tooth. Abont 10 specimens have the narrower carapace, almost trun- 

 cate lateral expansion with a rounded x>osterior angle. The remainder 

 of the specimens are intermediate in width, with the hepatic margin 

 more or less concave and its x^osterior angle subacute. The prominence 

 of the median tubercles varies with the individual. 



In male specimens of both varieties 25 mm. long the chelipeds are 

 identical; the palms are slightly constricted l)ehind the fingers, which 

 are evenly dentate and in contact for nearly their whole length. There 



