670 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



which there are several small raised verrucfe, five or six on each side of 

 the median line. The parts described appear to belong to the male 

 system of organs, and have their exact counterparts in the female sys- 

 tem of organs farther back. These consist of a large, obtuse, prominent 

 central papilla, at about the thirty-first segment, having what appears 

 to be the true female orifice at its concave summit ; just posterior to this, 

 there are two slender, median papillae, bilobed at the end, corresponding 

 in size and form with the two pits in front of the male orifice ; just in 

 advance of the large papilla, on the thirtieth segment, there is a shorter, 

 trans versely-bilobed papilla, agreeing in form and size with the pit just 

 behind the large central male orifice. These female organs are also sur- 

 rounded by a swollen area, on which there are several small rounded 

 depressions, corresponding in size and number to the small verrucaB on 

 the male area. The two specimens are alike in all these arrangements, 

 and were firmly united, head to head, by means of the organs, which 

 were inserted into the corresponding sockets, which act, therefore, some- 

 what like suckers, and serve to securely hold the two individuals in the 

 proper position. 



Color, in alcohol, dark brownish above, with two faint bands of red- 

 dish brown along each side toward the margin, separated by a narrow 

 line of blackish ; margins and ventral side dull reddish brown. 



Lake Okechobee, Florida— Dr. Edward Palmer. One specimen, when 

 preserved, was engaged in swallowing a small lumbricoid worm. 



AULASTOMUM LACUSTRE Leidy. 



Proceedings Acad. Nat. Sciences of Philadelphia for 1868, p. 229 ; Verrill, American 

 Journal of Science, vol. iii, p. 135, 1872. 



This species, as described by Dr. Leidy, has 10 ocelli ; 8 in the upper 

 lip, the last pair separated by an annuUis from the others. Male aper- 

 ture in the twenty-fourth annulus ; female orifice in the twenty-ninth. 

 (Esophagus capacious, with twelve folds. " Jaws thin, small, when at 

 rest included in pouches formed by an eversion of the mucous membrane. 

 Teeth, 12 in number to each jaw, bilobed at base." Color (var. a) 

 throughout olive green, closely maculated everywhere with confluent 

 spots of a darker hue of the same color. When full-grown, this species 

 becomes G to 8 inches or more long and half an inch broad. 



Var. 1), tlgris. — Large and broad, depressed. Color yellowish green 

 to dark olive-green, with scattered irregular blackish spots and blotches. 



Yar. c, fuliginosum.— Color uniform dusky or brownish black. 



Var. (?, virescens.— Color uniform greenish, or yellowish green, varying 

 to dark green ; usually paler beneath. 



In my specimens, the male organ is long, very slender, thread-like, and 

 is protruded from an opening in the twenty-fifth segment, behind the 

 mouth, (counting the buccal segment.) The female orifice is small, with 

 slightly raised borders, and is situated between the twenty-ninth and 

 thirtieth segments. The fourth pair of ocelli is on the buccal segment ; 

 and the fifth pair is on the third segment behind the mouth. 



