NORTH AMERICAN FRESH-WATER LEECHES. 687 



1871, and December 18, 1872 — F. S. Smitli ; near New Haven, on the same 

 fish— Prof. J. E. Todd. 



This species differs greatly, in the form and arrangement of the ace- 

 tabuhim and head, from the typical species of the genus, and, when 

 living specimens can be carefully studied, may require separation. 



ICHTHYOBDELLA PUNCTATA Verrill. 



American Jourual of Scieuce, vol. ii, p. 451, 1871 ; vol. iii, p. 1'27, 1872. 



Body, in extension, slender, in the preserved specimen, about 0.5 of an 

 inch long, 0.00 in greatest diameter, rounded, thickest posteriorly, taper- 

 ing anteriorly to the anterior sucker, which is broad and thin, subcircular, 

 about three times as wide as the neck where it is attached. Ocelli four, 

 on the ui)per side of the anterior sucker : two larger, black ones, in front; 

 and two minute ones wider apart and farther back. Posterior sucker 

 large, rounded or oval. Color translucent greenish, with a j)ale median 

 dorsal line, and with minute black specks arranged in transverse bands ; 

 along each side are eight light spots, alternating with the dark punctate 

 bauds. 



Among the Slate Islands, Lake Superior, in 6 to 8 fathoms — S. I 

 Smith. 



ICHTHYOBDELLA MiLNERI Yerrill, sp. tlOV. 



Body slender, elongated, a little depressed, in alcoholic specimens about 

 0.75 of an inch long, and 0.06 to 0.08 broad. Ocelli four, conspicuous, tbe 

 anterior pair larger and wider apart; the head is quite obli(pie, broadly 

 expanded, and extends out in front far beyond the ocelli. Acetabulum 

 large, about twice the diameter of the body, with a circk^ of about twelve 

 black, ocelli-like spots, around the middle. Color of body, in preserved 

 specimens, yellowish, with four longitudinal rows of connected large 

 angular spots of greenish, of which one extends along the u[)per, and 

 one along the lower side, near the margins, leaving a pale band along 

 the middle of the back and of the ventral surface; that of the back is 

 often interrui)ted by the encroachment of the lateral green spots, the 

 points of which frequently meet across the back, dividing the median 

 pale band into a series of large rounded or transversely elliptical spots. 

 The lateral green spots are variable in form, but often rhomboidal, with 

 the most acute angle toward the median line of the buck ; they are 

 connected along the margins by a nearly continuous band of green, or 

 else by two narrow lines of green, separated by a pale line. The green 

 spots are made up of small stellate specks of deep green, intermingled 

 with others of orange. Head and acetabulum pale, but usually more 

 or less specked with green and orange; the acetabulum often has a mar- 

 ginal circle of pale spots, alternating with greenish. 



Thunder Bay, Michigan, in 25 fathoms, abundant, and also in floating 

 \weeds— J. W. Miluer, 1873. 



