S. I. Smith — Crustaceans of the Atlantic Coast. 
63 
me, by letter, that his figure ancl 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 inermis mentioned 
above), II. Moorii (a variety of the last), H. varians ( Virbius 
varians of Stimpson), II. Chranchii , and H. Sowerbcei (Leach’s 
Alpheus spinus , here for the first time referred to Hippolyte). 
Numerous other more or less allied species were added to the 
genus by subsequent authoi*s, 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 aud the structural differences 
between them made known. Ivroyer’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 acuminata Dana, II. viridis Milne-Edwards, II. smaragdina, 
H. obliquimana Dana, II. exilirostrata Dana, II. varians , and II. 
Prideauxiana, together with Virbius Australiensis, acutus and 
Kraussianus Stimpson. Stimpson’s Virbius 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 synonjun 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 !, off 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 Jeffrey’s Ledge!, 24 and 33 fathoms, gravel and 
