204 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



long or nearly as long as upper margin of palm, with a subbasal tooth; 

 immovable finger with a basal tooth; distal ends of fingers meeting, 

 their edges crenulate. 



The legs of the first pair exceed the cheliped little or not at all; 

 the other pairs are considerably shorter and themselves diminish 

 successively in length. The merus of each terminates in a short, 

 sharp point above; the dactylus is slender and curved. 



Description of Chorilia longipes turglda.- — -In the southern part of 

 its range, the carapace of C. longipes becomes much rougher, more 



spinous, the tubercles replaced by 



\ « short sharp spines; the hepatic 



^C) region bears a spine on its margin 



^^ ___- izr^^* instead of a tubercle or blunt ridge; 



the width of the carapace increases 

 notably in proportion to the length, 

 Fig. 82.— Chorilia longipes turgida, front thebranchial regions are inflated and 

 ANDORBiT.xi.e. (AFTER RATHBUN) approach nearcr the median line, 



so that the distance between them is not more than half the greatest 

 width of the cardiac region and is often much less; the movable 

 segments of the antennal peduncle are longer and more slender. 



Occasional specimens intermediate between the typical and the 

 turgida forms have been found from Oregon southward. 



Measurements. — ^Male of typical form (31634), length of carapace 

 on median line 53.2, width 44.4 mm. Male holotype of subspecies 

 turgida (15500), length of carapace on median line 56, width 50 mm. 



Range of the species. — Shumagin Bank and Kodiak, Alaska, to 

 San Diego, California; Japan. 18 to 650 fathoms. The typical 

 form ranges from the northern limit to Monterey Bay; the subspecies 

 urgida, from Monterey Bay to San Dieg^o. Another subspecies, 

 C. 1. japonica (Miers) inhabits Japanese waters. 

 Material examined. — See table, pages 205-209. 



Genus ROCHINIA A. Milne Edwards 



Amathia Roux, Crust. Medit., 1828, p. [5]; type, A. rissoana Roux. — 



Milne Edwards, Hist. Nat. Crust., vol. 1, 1834, p. 285. Not Amathia 



Lamouroux, 1816, a genus of polyps. 

 Pisa (Amathia) De Haan, Fauna Japon., 1839, pp. 78 and 84. 

 Rochinia A. Milne Edwards, Crust. Reg. Mex., 1875, p. 86; type, R. 



gracilipes A. Milne Edwards. 

 Scyramathia A. Milne Edwards, Comptes Rendus Acad. Sci., Paris, vol. 91, 



1880, p. 356; type, S. carpenteri Norman. — Alcock, Journ. Asiat. Soc. 



Bengal, vol. 64, 1895, p. 201. — A. Milne EDW^\RDS and Bouvier, Exped. 



Sci. Travailleur et Talisman, Crust. Dec, pt. 1, 1900, p. 131. 

 Anamathia Smith, Proc. U. S. Nat. Mus., vol. 7, 1885, p. 493; type, A. 



rissoana (Roux). — Miers, Challenger Rept., Zool., vol. 17, 1886, p. 25. 

 Rachinia Alcock, Journ. Asiat. Soc. Bengal, vol. 64, 1895, p. 165. 



Carapace pyriform or elongate-triangular, with posterior margin 

 rounded; armed with spines or spines and tubercles. Hepatic and 



