Moore. — platibdélla chiLensis, n. s^. 
29 
^latybdella chilensis, sp. nov. 
BY 
Dr. J. Percy lYIOORE 
(University of Pensylvania) 
Distinctly divided into a more slender, terete, anterior re- 
gion and a larger, flattened, posterior region. Oral sucker 
broadly attached, little expanded, with thickened rim and little 
produced lip, bearing, near its posterior margin a pair of mi- 
nute, widely separated eyespots. A second pair of slightly lar- 
ger eyes is situated on the dorsum of the first nuchal segment, 
somewhat nearer together, the two pairs forming a quadrate 
figure. No metameric features can be distinguished on the head, 
which is counted as four somites. 
Anterior region of body constituting about one fifth of the 
length of contracted specimens, of nearly uniform diameter to 
the clitellum, which is slightly wider and covers its last two 
segments. This region distinctly but somewhat irregularly an- 
nulated and probably enrtbracing seven or eight somites, of 
which all except the first are triannulatc. Last two segmentl 
constituting most of the clitellum larger than the others ans 
with a well developed layer of integumenlal glands. Male gend 
tal orifice a conspicuous transverse slit between the second ani- 
third annuli of the first clitellar segment (X ?). Female genitad 
orifice not visible on surface views. 
Posterior region rather abruptly wider and continuing to 
broaden to about the middle of the body, rather strongly de- 
pressed, the greatest width being about twice the depth. Bet- 
ween the clitellum and the anus are twenty five well marked 
annuli, many of which are secondarily biannulate, while three 
