WOODWORTH: ILLINOIS TURBELLARIA. w 
11,6646, Station C; 13,069, Station ©. 
Only one of the specimens exhibited sexual organs. There is no copulatory 
bursa and the oviducts open separately into the vagina immediately before it 
enters the genital atrium. The species in every way agrees with descriptions 
of the European form. There can be no doubt that it is the species described 
by Girard as Dugesia gonocephaloides. According to this author the latter differs 
from P. gonocephala only in the elongated form of the clear areas surrounding 
the eye-spots, and upon this meagre difference is founded the genus which 
Girard afterwards (1891) extended to include all forms bearing angular cephalic 
appendages. Stimpson and Diesing retained the specific name, but placed it 
under the genus Planaria, a fact that was apparently unknown to Silliman, who 
renamed it Planaria gonocephaloides. Hallez (1890, p. 78) has discussed the 
value of Girard’s genus Dugesia, and places D. gonocephala as a synonym of 
P. gonocephala, in which species the elongated shape of the periocular areas is 
not uncommon, P. gonocephala has been shown by Tijima (1890, p. 338) to be 
cosmopolitan in its distribution, as it was found by him in Japan, 
The color of the American representatives of P. gonocephala differs from that 
of the European in being of a deeper hue. The European forms vary from a 
gray toa brownish green, while the Illinois specimens are of a deep brown, 
which is well reproduced in Figure 5. Some specimens from France that I 
have received through the kindness of Professor Hallez, of Lille, are almost 
white in the alcoholic condition. Girard (1898, p. 183) describes the color of 
Dugesia gonocephaloides as often being a blackish brown. 
Planaria dorotocephala, sp. nov. 
Figures 4, 7. 
Planaria maculata var. a GIRARD, 1898, p. 182. 
Sides parallel, tapering gradually to a point posteriorly. Anterior end large, 
sharply pointed, the sides of the head making an angle of about 45° with each 
other, Two long sharply pointed, very prominent auricular appendages, 
slightly posterior to the plane occupied by the eyes. Auricles always prom- 
inent in preserved material. Length of head about 4 of the total length of the 
animal, Width of the head at its junction with the auricular appendages 
greater than the diameter of body anywhere posterior to the appendages. Color, 
reddish to yellowish brown, uniform. Posterior margins of auricular append- 
ages free from pigment. Occasionally a narrow light median streak extending 
caudad from just back of the eye-spots. Length 8 to 13mm., greatest breadth 
$ to 14mm. 
22,081; Station H, Matanzas Lake; Station C; Havana. 
A very active, restless, rampant form. When in motion the head is elevated 
and moved from side to side, the long auricular appendages being elevated above 
the head. After being disturbed, it does not come to rest for a long time as 
compared with P. gonocephala and P. maculata, the latter being particularly 
sluggish, A peculiarity of this species is the frequent occurrence of accessory 
