80 
S. I. Smith — Crustaceans of the Atlantic Coast. 
examined; these collections have been made in July, August, Sep- 
tember, October and April, so that the species evidently breeds 
during a large portion of the year. 
Hippolyte polaris Ross. 
Alpheus polaris Sabine, in Supplement to appendix of Parry’s [first] Yoyage, p. 
ecxxxviii, pi. 2, figs. 5-8, 1824. 
Hippolyte polaris J. C. Ross, in John Ross, Appendix to narrative of a second Yoyage 
in search of the northwest passage, p. lxxxv, 1835 ( ? ). 
Hippolyte borealis J. C. Ross, in John Ross, op. cit., p. lxxxiv, pi. B, fig. 3, 1835 ( $ ). 
? Hippolyte cultellata Norman, in Report of exploring the Hebrides, part ii, Report 
British Assoc. Adv. Sei., 1866, p. 200, 186*7 ; Last Report on dredging among the 
Shetland Isles, op. ult. cit., 1867, p. 265. 
Plate XI, figures 1 to 4. 
Massachusetts Bay !, off Salem, 1877: 35 fathoms, mud and clay 
nodules ; and 48 fathoms, soft mud [a]. Between Cape Ann and the 
Isles of Shoals !, 33 fathoms, gravel and stones, 1873 [ft]. Casco Bay !, 
1873 [c] : near West Cod Ledge, 10 to 15 fathoms, rocky, and from 
stomachs of the cod taken at the same locality. Also off Seguin Isl- 
and !, 48 fathoms, gravel, 1873 [</]. Cashe’s Ledge !, 30 to 40 fathoms, 
gravel [e]; and near the Ledge, 65 fathoms, mud and gravel, 1874 
[/’]. Bay of Fundy !, 1870, 1872 [</]. About east-southeast from 
Cape Sable, Nova Scotia!, north latitude 42° 45', west longitude 66° 
27', 75 fathoms, fine sand and mud, 1877 [A]. Off Cape Negro!, 
Nova Scotia, 59 fathoms, pebbles, sand and rocks, 1877. Halifax!, 
Nova Scotia, 1877 : 16 fathoms, rocks, and stones and red algae \i] % , 
18 fathoms, fine sand [A] ; and 25 fathoms, gravel. Off Halifax !, 
1877 : 25 fathoms, rocks and nullipora [/] ; 52 fathoms, fine sand and 
mud; and 100 fathoms, fine sand \rn\ Gulf St. Lawrence! (Whit- 
eaves, 1871). Labrador ! (Packard). Grinnell Land (Miers). Green- 
land (Kroyer, et al.), as far north as 81° 44' (Miers). Arctic Ocean, 
north of Bering Straits (Stimpson). Spitsbergen (Kroyer, Miers). 
West coast of Norway! (G. O. Sars) [n]. North Sea (Metzger). 
? Shetland Islands (IT. cultellata Norman). 
This species presents another case of differences between certain 
individuals among the adult males, or perhaps more properly old 
males, on the one hand, and the females and younger males, on the 
other hand; that is, the borealis- form bears much the same relation 
to the original polaris as gibba does to Gaimardii , and a relation 
somewhat similar to that of Phippsii to turgida. The specimens 
before me show a very complete series connecting the most character- 
istic form of borealis w T ith the ordinary forms of polaris. Of the spe- 
