Hawaiian Polydads — Hyman 
309 
the animal. To either side in the middle region 
of the worm the brown uterine networks filled 
with eggs are conspicuous even to the naked 
eye. As typical of the genus the dorsal surface 
bears numerous papillae with rounded tips. They 
are only fairly numerous and not thickly set. 
They are not entered by a branch of the intestine. 
It has been very difficult for me to decide 
whether the present species might not be identi- 
cal with Peasia tentaculata (Pease, 1860: 37), 
which is obviously a species of Physanozoon. 
Neither the description nor the colored figure 
(pi. 70, figs. 5, 6) are very helpful. The color 
is stated to be light fawn with darker papillae, 
agreeing well enough with the present spec- 
imen, but the red line around the margin does 
not agree. The papillae are depicted as pointed 
and described as mucronate, that is, suddenly 
narrowing to a pointed tip. The features of the 
ventral surface in Pease’s figure are not under- 
standable in terms of the genus. Because of these 
discrepancies I judge it preferable to consider 
my specimen an undescribed species. 
The specimen in alcohol is deposited as a 
holotype in the Bishop Museum. 
Pseudoceros affinis (Kelaart, 1858) 
The specimen is of oval form, measuring 30 
by 20 mm., with ruffled margins and typical 
tentacular folds at the anterior margin. The 
color is described by the collector as deep violet 
with a bright orange margin edged with black. 
The species has a pair of male apparatuses. The 
male gonopores occur at 12 mm. from the 
anterior margin, the female gonopore at 13.5 
mm., and the sucker at 17.5 mm., hence situated 
considerably anterior to the middle. In addition 
to the colored figure in Colli ngwood (1876, pi. 
19, fig. 23), there is a colored figure in Stum- 
mer-Traunfels (1933, col. pi. following p. 
3596, fig. 11). This latter figure closely re- 
sembles my specimen. 
Pseudoceros affinis is probably common in 
the tropical west Pacific. The original specimen 
came from Ceylon and the specimen in Stum- 
mer-Traunfels was part of the Semper material 
collected in the Philippines; the colored figure 
was made from life by Mrs. Semper. The pres- 
ent record from the Hawaiian Islands indicates 
an extensive range for the species. 
REFERENCES 
Collxngwood, C. 1876. On thirty-one species 
of marine planarians, collected partly by the 
late Dr. Kelaart, F. L. S., at Trincomalee, and 
partly by Dr. Collingwood, F. L. S., in the 
eastern seas. Trans. Linn. Soc. Lond., ser. 2, 
Zook 1: 83-98, pis. 17-19. 
Hyman, Libbie H. 1954. Some polyclad flat- 
worms from the Hawaiian Islands. Pacif. Sci. 
8: 332-336, 3 figs. 
Kelaart, E. F. 1858. Description of new and 
little known species of Ceylon nudibranchiate 
molluscs and zoophytes. J. Ceylon Br. Roy. 
Asiat. Soc. 1856-1859: 134-139. 
Pease, W. Harper. 1860. Descriptions of new 
species of Planariidae collected in the Sand- 
wich Islands. Proc. Zool. Soc. Lond.: 37-38, 
pi. 70. 
Schmarda, Ludwig. 1859. Neue wirbellosen 
Thiere beobachtet und gesammelt auf einer 
Reise um die Erde. Erster Band, Turbellarien, 
Rotatorien, und Anneliden. Wilhelm Engel- 
mann, Leipzig. Erste Halfte, xviii + 66 pp., 
15 pis. 
Stummer-Traunfels, R. 1933. Polycladida. 
In: Klassen und Ordnungen des Tierreichs, 
H. G. Bronn, ed. Vol. 4, Abt. lc, Lief. 179, pp. 
3485-3596, 176 text figs., 1 col. pi. 
