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



The spines at the tip of the telson are normally of the same num- 

 ber and similar to those of JT. Fabrlcll, and the terminal angle is 

 usually very obtuse and rounded (Plate IX, figure 8). One specimen, 

 however, out of the twenty-one in which the tip of the telson was 

 examined, a female, 39'"™ long, from Casco Bay, has the tip of the 

 telson (Plate IX, figure 9) acute and armed with three small ciliated 

 spines in the middle in place of two, so that there are seven spines 

 in all. In other respects this specimen is perfectly normal and indis- 

 tinguishable from ordinary individuals. Similar variations are 

 noticed under H. polaris and H. pusiola and well illustrate the difii- 

 culty of stating accurately the specific characters in this genus. 



Specimens taken among algae and eel-grass in Casco Bay were, in 

 life, translucent, slightly tinged with greenish brown, and without 

 brightly colored markings of any kind. 



Hippolyte spinus White. 



Cancer spinm Sowerby, British Miscellany, p. 47. pi. 23, 1805. 



Alphceus spinus Leach, " Edinburgh Encyclopedia, vii, p. 4.31, 1813-14" (Miers), 



American edit., vii, p. 271 ; Transactions Linnean Soc. London, xi, p. 347, 1815. 

 Hippohjte Soiverbcei Leach, Malacostraca Podophthalmata Britannia, pi. 39, 1817. 

 Hippolyte spinus White, List Crust. British Museum, p. 76, 1847. — Bell, History of 



British Crustacea, p. 284 [1847?] 

 Hippolyte spina Stimpson, Proceedings Acad. Nat. Sci. Philadelphia, xii, p 34 (103), 



1860 ; Annals Lyceum Nat. Hist. New York, x, p. 126, 1871. 



Massachusetts Bay !, oflT Salem, ISYV; 20 to 30 fathoms, gravel 

 and rocks, common ; 33 fathoms, sand and mud ; 35 fathoms, mud 

 and clay nodules, abundant ; 33 fathoms, sand and mud ; 48 fathoms, 

 soft mud. Gulf of Maine !, off Cape Ann, 1877, 50 fathoms, mud, 

 gravel and rocks ; and 90 fathoms, soft mud, common. Abundant 

 on Stellwagen's Bank !, 29 fathoms, rocky, and on Jeffrey's Ledge !, 

 24 and 33 fathoms, gravel and stones, 1873. Near the Isles of 

 Shoals !, 25 fathoms, rocky, abundant, and between the Isles and 

 Cape Ann !, 27 to 36 fathoms, mud and rocks, 1874. Cashe's Ledge !, 

 Gulf of Maine, 27 and 40 fathoms, gravel and rocks, very abundant ; 

 and a little south of the Ledge, 52 to 90 fathoms, rocky, 1873, 1874. 

 Casco Bay !, 1873, among stones, at low-water mark !, on Ram Island 

 Ledge, and common in 10 to 35 fathoms, on rocky, gravelly and 

 shelly bottoms ; taken also in 9 fathoms, mud, off Fort Georges, 

 Portland Harbor. Very abundant in the Bay of Fundy !, 1864, 1868, 

 1870, 1872, 1876, on all kinds of hard bottoms in 5 to 40 fathoms; 

 taken also, in 1872, off Whitehead, Grand Menan, 40 to 50 fathoms, 

 gravlley bottom ; west of Grand Menan, 50 to 55 fathoms, gravel ; 



