5 
pointed at the top, thus showing likeness to the 
tentacles, which one may see in European species 
of Stylochoplana (for example, Lang, 1884, Taf. 2). 
Plate I, Fig. 2 furnishes a better picture of the ten¬ 
tacles than Fig. 1 and comes doser to the natural 
shape; on Plate I, Fig. 5 the tentacles are more con- 
tracted. The iwo figures mentioned last belong to 
var. hawaiiensis. The distance between the two ten¬ 
tacles is about V 5 and Ve of the greatest breadth 
of the body. A line connecting the two would run 
across the broad, rounded brain. 
The dorsal surface of the body has a character- 
istic colour pattern (Plate I, Fig. 1), caused by nume- 
rous small, irregular, greenish-brown pigment-spots. 
They åre particularly frequent in the middle zone 
of the body. The pigment occurs in an unusual 
quantity in the dorsal muscular wall of the body, 
but is also found, although more sparsely, in the dorsal part of the paren- 
chyma. Epidermis and basement membrane entirely lack pigmentation. 
The arrangement of the eyes is shown 
in text-fig. 2. A characteristic feature 
noted in each of the cerebral eye- 
clusters is a denser anterior cluster of 
ocelli and a separate posterior group be- 
hind the brain. Still further back toward 
the pharynx a few scattered ocelli occur. 
In this connection it might be mentioned 
that the two types of eyes, which I have 
found in several Stylochoplana-s'^iQCXQS, 
and which I shall describe in a special 
paper, also occur in these cerebral eye- 
clusters. As regards the tentacular eye- 
groups, the majority of the ocelli are 
situated inside the tentacles. 
The pharynx is almost centrally 
placed, long and narrow, and much folded 
(text-fig. 3). This figure also shows that 
the mouth is far back in the pharyngeal 
o 
o 
° c 
a 0 
O 
O 
Text-fig. 2. 
Ceratoplana colobocentroti. 
Arrangement of cerebral and 
tentacular eyes. 
Text-fig. 1. 
Ceratoplana co¬ 
lobocentroti n. g. 
n. sp. Ventral 
view of animal. 
Tentacles not 
visible. 
