S. I. Smith — Crustaceans of the Atlantic Coast. Y3 



The preceding table gives measurements* and the dental formula 

 for the rostrum of some of the specimens from different localities, 



Hippolyte Phippsii Kroyer. 



Eipimlyte Phippsii Kroyer, Naturhistorisk Tidsskrift, iii, p. 575, 1841 ( 5 ). 



Hippolyte turgida Kroyer, loc. cit, p. 575, 1841 ( ? ). 



Hippolyte vihrans Stimpson, Annals Lyceum Nat. Hist. New York, x, p. 125, 1871 



( $ , var.) 

 f Hippolyte Oclwtensis Brandt, in Middendorff's Sibirische Reise, ii, p. 120, pi. 5, fig. 

 17, 1849 ( ? ). 



Massachusetts Bay!, oft' Salem, 187Y : 20 fathoms, rocks and 

 gravel ; 33 fathoms, sand and mud ; 35 fathoms, mud and clay 

 nodules ; and 48 fathoms, soft mud. Off" Cape Ann !, 50 fathoms, 

 mud and gravel, 1877. Oft' the Isles of Slioals !, 27 to 36 fathoms, 

 rocks and mud, 1874. Jeffrey's Ledge!, 24 fathoms, gravel and 

 stones, 1873. Cashe's Ledge!, 27 and 40 fathoms, 1874, — 27 males 

 and 24 females. Xear Cashe's Ledge!, 52 to 90 fathoms, rocky, 

 1873. Casco Bay!, 10 to 22 fathoms, rocky, near West Cod Ledge, 

 1873. Eastport !, Bay of Fundy, 18-25 fathoms, rocks and shells, 

 1868, 1870. Grand 'iVIenan !, Bay of Fundy, 1872 (Prof. H. E. 

 Webster). Halifax!, Nova Scotia, 1877: 16 fathoms, fine sand and 

 red algte ; 18 fathoms, fine sand; 25 fathoms, rocks and nuUipora ; 

 25 fathoms, gravel; and 26 to 41 fathoms, soft mud, in Bedford 

 Basin, — a single specimen. Gulf of St. Lawrence ! (J. F. Whiteaves): 

 off Trinity Bay, 90 fathoms, small stones and coarse sand, and off 

 Cape Rosier Light, 125 fathoms, mud, 1871; Orphan Bank, 1873. 

 Labrador ! (A. S. Packard, Jr.) Grinnell Land and as far north as 

 latitude 81° 44' (Miers). Greenland (Kroyer, Stimpson, et al.). Arctic 



* In these measurements, as in all those which I give of Macrura and Schizopoda, 

 the length is from the tip of the rostrum to the tip of the telson while the abdomen is 

 extended nearly straight with the carapax ; the length of the carapax and rostrum is 

 from the tip of the rostrum to the middle of the posterior margin ; the length of the 

 rostrum is from the tip to the posterior margin of the orbit ; the breadth of the cara- 

 pax is at the widest point — a measurement which varies with the state of contraction 

 more than the others. The length of the rostrum as measured above may be very 

 slightly too great, particularly if the rostrum be relatively short, since it is not per- 

 fectly parallel with the longitudinal axis, but it has the practical advantage of being 

 between definite points — ^a matter of the utmost importance. The length of the cara- 

 pax exclusive of the rostrum is taken from the posterior margin of the orbit to the 

 middle of the posterior margin, but is found accurately enough by subtracting the 

 length of the rostrum from that of the carapax and rostrum. If the rostrum is very 

 short it is better to measure the length of the carapax exclusive of the rostrum and 

 find the length of the rostrum by subtraction. 



Trans. Conn. Acad., Vol. V. 10 January, 1879. 



