20 BULLETIN OF THE 



Also taken by the U. S. Fish Commission, in 51 to 155 fathoms, off Martha's 

 Vineyard, in 1880 and 1881. 



Two specimens from Fish Commission Station 874, 85 fathoms, give the 

 following measurements : — 



Sex 



Length, from front of carapax to tip of abdomen 

 Length of eye-stalk ...... 



Greatest diameter of eye ...... 



Length of right cheliped ..... 



" chela ....... 



Breadth of chela 



LengtJi of left cheliped 



" chela 



Breadth of chela 



Length of first ambulatory leg, right side 



PARAPAGURID^, 



The genus Parapagurus differs so widely from all other Paguridea in pos- 

 sessing trichobranchise instead of phyllobranchiiie, that it ought, undoubtedly, 

 to be separated as a distinct family on this character alone. 



Parapagurus pilosimanus Smitu.* 



Trans. Conn. Acad., V. p. 51, 1879 ; Proc. National Mus., Washington, III. p. 428, 



1881. 



Plate II. Figs. 4 - 4^ 



This species has also been taken, and in consideral)le abundance, by the 

 U. S. Fish Commission, in deep water off Martha's Vineyard. At Station 



* A. Milne-Edwards in a recent report on the explorations of the " Tra%'aineur," in 

 the Comptes-Rendus of the Academy of Sciences, Paris, Dec. 1881 (Ann. Mag. Nat. 

 Hist, fith ser., IX. p. 42, 1882), states that his Eiqxtgurxis Jacohii from the "Blake " 

 dredgings (Bull. Mus. Comp. Zool., VIII. p. 42, 1880) is identical with this species, 

 of which specimens were sent to him last June. 



