NORTH AMERICAN FRESH-WATER LEECHES. 687 



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

 fish— Prof. J. E. Todd. 



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

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

 living specimens can be carefully studied, may require separation. 



ICHTHYOBDELLA PUNCTATA Verrill. 



Auiericau Journal of Science, vol. ii, p. 451, 1871 ; vol. iii, p. 127, 1872. 



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

 iuch long, 0.06 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 upper 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 pale median 

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

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

 bands. 



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

 Smith. 



ICHTHYOBDELLA MiLNERI Ycrrill, Sp. nov. 



Body slender, elongated, alittledepressed,in alcoholic specimens about 

 0.75 of an inch long, and O.OG to 0.08 broad. Ocelli four, conspicuous, the 

 anterior pair larger and wider apart; the head is quite oblique, broadly 

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

 large, about twice the diameter of the body, with a circle of about twelve 

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

 speciiuens, yellowish, with four longitudinal rows of connected large 

 angular spots of greenish, of which one extends along the upper, and 

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

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

 often interrupted 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 back; they are 

 connected along the margins by a nearly continuous baud 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, intermiugled 

 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. Milner, 1873. 



