CRUSTACEA COLLECTED IN PUGET SOUND, N.A. 273 



affinity with Cancer, and again in the Bracbyura of the 

 "Challenger" Voyage, p. 210. 



It is difficult to see why De Haan, and after him Dana, 

 should have placed it in Corystidae, the latter author 

 making a family Trichoceridce, consisting of this genus 

 alone. I propose to abolish this family and to place 

 Trichocarcinus next to Cancer, from which it differs in its 

 more strongly defined regions of the carapace. 



Family Corystidje, Dana. 



Genus Telmessus, White, 1846. 



Telmessus clieiragonus (Tilesius). 



Two specimens. Length 22 mm. Width, including 

 lateral spines, 25 mm.* 



For description and synonymy see Benedict's excellent 

 Memoir in Proc. U.S. National Museum, vol. XV., p. 223, 

 Pis. XXV. and XXVI. (1892). 



CATOMETOPA. 



Family Grapsid^;, Dana. 

 Genus Heterograpsus, Lucas, 1849. 

 Heterograpsus nuclus (Dana). 



Two specimens. Length 25 mm., width 29 mm. 



For synonymy, &c, see Kingsley's Synopsis of the 

 Grapsidae, Proc. Acad. Xat. Sci., Philadelphia, 1880, 

 p. 208. As, however, Ortmann (Zool. Jahrbuch, Syst. 

 VII. , 1894, p. 715) rejects this author's identification of 

 H. midus with H. sanguineus (De Haan), I have retained 

 Dana's name. 



* In all cases, unless otherwise stated, the largest specimens have been 

 measured. Measurements include rostrum and, except in Brachyura, caudal 

 appendages. 



