135 
sections, as I regard this animal as the type-specimen. The figures 
in parentheses refer to the two largest specimens. The total length 
of body 41 ( 55 ; 56) mm., largest breadth 27V2 (35; 38) mm. The 
distance of tentacles from anterior margin 8.5 (I2.5; 13) mm., their 
interdistance 3.8 (5; 5 . 3 ) mm. In transverse section the tentacle 
reaches O.9 mm. The mouth is located at a distance of 24 (33; 33) 
mm. from frontal margin, the male aperture 5.5 (7.s; —) mm. from 
caudal end of body. The interspace between sexual openings is 1 
(1) mm. The pharynx reaches a length of 20 mm. 
Arrangement of eyes; There are marginal, cerebral, and 
tentacular eyes, but apparently no frontal ones. The marginal 
eyes (text-fig. 20) occur in an enormous number, especially in the 
anterior part of the body. At the frontal margin they are densely 
arranged in many irregular rows (text-fig. 20 a). The exterior border 
of this marginal band of eyes is distinet, but on the internal side 
the eyes are more scattered. Thus there is a marked difference in 
the distribution, the peripheral ocelli being far more numerous. 
The distance of the „eye-band“ from the edge of the body is less 
than half its breadth. The „band“ continues all around the body 
and even at the posterior end holds a fair number of more scattered 
eyes (text-fig. 20 b). From the figures given one may gather (observe 
the difference in magnification) that here the eyes come doser to 
the margin than in the anterior body-half. 
The cerebral eyes (text-fig. 21) are rather widely scattered. 
They are arranged in two elongated clusters, each consisting of 
nearly 100 ocelli. There is a well-marked 
difference in size between the cerebral 
ocelli on the one hånd and the marginal 
and tentacular on the other. A comparison 
between text-figures 20 and 21 will make 
this clear. Although not so well marked, 
there is a preponderance in the clusters 
to have more eyes located behind than 
in front of the line connecting the tentac¬ 
les. The latter eyes lie more sparsely. The 
tentacular eyes (text-fig. 22) are chiefly 
gathered together in a compact group in 
the interior of the tentacles. Their total 
t 
Text-fig. 22. Kaburakia excelsa. 
Upper end of a tentacle and 
the furrow surrounding it. 
When the tentacle is retracted, 
a pocket-like depression is 
fonned. 45 x. 
