S. I. Smith — Crustaceans of the Atlantic Coast. 63 



me, by letter, that his figure and description had been made from 

 mutilated specimens, of what he had since ascertained to be a very- 

 distinct species, and requested me to take the earliest opportunity to 

 correct his mistake," thus fully disposing of Montagu's species and 

 unquestionably establishing varians as the type of the genus. In 

 this last work the genus Hippolyte includes five species, as follows : 

 H. Prideauxiana (apparently the same as the inertnis mentioned 

 above), H. Moorii (a variety of the last), H. varians ( Virhius 

 varians of Stimpson), H. Chranchii, and H. ISowerhmi (Leach's 

 Aljyheus spinus, here for the first time referred to Hij^polyte). 



Numerous other more or less allied species were added to the 

 genus by subsequent authors, but little was added to our knowledge 

 of the structure and real affinities of the species until the appearance of 

 Kroyer's monograph, in 1842, in which many new arctic species were 

 very fully described and figured and the structural difierences 

 between them made known. Kroyer's first section of the genus con- 

 tained but one species, the smaragdina, apparently synonymous with 

 Leach's varians. This section of the genus is equivalent to Stimp- 

 son's genus Virbius (Proceedings Acad. Nat. Sci. Philadelphia, xii, 

 p. 35 (104), 1861), which is characterized specially by non-palpigerous 

 mandibles, the absence of epipodal appendages upon the external 

 maxillipeds and thoracic legs, and by the tri-articulate carpus of the 

 second thoracic legs, and, as originally constituted, included Hippo- 

 lyte aemninata Dana, II. viridis Milne-Edwards, II. smaragdina, 

 H. obliquimana Dana, H. exilirostrata Dana, H. varians, and II. 

 Prideauxiana., together with Virhius Australiensis, acutiis and 

 Kraussiattus Stimpson. Stimpson's Virhius is thus seen to include 

 the type and all the original species of Leach's genus, and, according 

 to common practice, it should be made a synonym of that genus and a 

 new name given to the larger division, which includes nearly all the 

 arctic species, of the genus as used by Kroyer. Nothing but addi- 

 tional synonymy and confusion would result, however, and I there- 

 fore accept the generic names as they now stand. 



Hippolyte Fabricii Kroyer. 



Salem Harbor!, 6 fathoms, 1873. Massachusetts Bay !, oflT Salem, 

 1877 : abundant in 19 to 30 fathoms, gravelly, stony and rocky bot- 

 toms ; common in 35 fathoms, mud and clay nodules, and in 48 

 fathoms, soft mud. Off Cape Ann !, 50 fathoms, mud, gravel and 

 stones, 1877. Common on Stellwagen's Bank !, 22 to 29 fathoms, 

 rocky, and on Jeflrey's Ledge !, 24 and 33 fathoms, gravel and 



