Poly clad Genus Pseudoceros — HymAN 
223 
P. cmcinnus is a euryleptid is dearly erroneous 
as Collingwood definitely notes the presence 
of an ”arbusculiform alimentary tube occupy- 
ing the anterior third.” In other words , Col- 
lingwood’s species had a ruffled pharynx and 
hence is definitely a Pseudoceros. Kaburaki 
( 1923 : 642) assigned to P. concinnus a single 
specimen collected at Tawi Tawi, Philippines. 
This was estimated to have been 55 milli- 
meters long when alive, extended, and the 
color is stated to have been pale cream buff 
with a narrow border of cobalt blue and two 
longitudinal blue lines on the median dorsal 
region. The correctness of Kaburaki’s iden- 
tification is certainly open to doubt. Stummer- 
Traunfels (1933: following p. 3596) presents 
a colored plate on which there are depicted a 
number of species of Pseudoceros, mostly un- 
described and unnamed. One of these, his 
Figure 9, is said to be P. concinnus, but this 
specimen is blue with three dorsal longitu- 
dinal yellow stripes, hence does not agree at 
all with the original description. On the other 
hand, Figure 16 on the same plate, said to be 
an undescribed Pseudoceros collected by Sem- 
per in the Philippines, is deep yellow with 
a blue border composed of spots and hence 
agrees very well with the present specimens 
and with the original description except for 
the lack of a middorsal blue stripe. This spec- 
imen is 22 millimeters long, and I judge it 
to be identical with the present specimens. 
Evidently there are common throughout 
the Indo-Pacific area members of the genus 
Pseudoceros that are of relatively small size and 
slender form and that are colored cream to 
orange with a blue border and with or without 
one or two middorsal blue stripes. Whether 
all these are the same species and whether all 
or some are P. concinnus must remain uncer- 
tain in the present state of information. The 
present specimens have been deposited in the 
American Museum of Natural History. 
Pseudoceros corailophilus n. sp. 
Fig.- 2 
A single specimen collected at Heron Is- 
land, Great Barrier Reef of Australia, in the 
summer of 1952, has been given a new trivial 
name with some hesitation, but as it does not 
appear to correspond to any described species, 
naming it may offer a certain convenience. 
The specimen (Fig. 2) is 22 millimeters 
long by 12 millimeters wide, but as it is some- 
what contracted and, further, is juvenile, the 
species would evidently attain a much larger 
size. The form is oblong oval. No color notes 
accompanied the specimen, but the color ap- 
pears well preserved and the pattern differs 
from that of any described species, as far as 
I can ascertain. The ground color is a dusky 
brown, and there is a heavy black border; to 
Fig. 2. Pseudoceros corailophilus, entire specimen as 
cleared whole mount. 1, Tentacular folds; 3, cerebral 
eyes; 4, ruffled pharynx; 10, sucker; 11, main intestine; 
25, white margin; 26, black border; 27, yellowish- 
brown band; 28, mouth. 
i 
