592 



MEGUMI YERI AND TOKIO KABURAKI : 



Fig. 1. 



Fig. I. Neostylochtis fulvopunctatus, 

 n. gen., n. sp. Drawn from the 

 living specimen. 



head margin. The middle parts of that tract join posteriorly the area 

 of cerebral eye-spots ; in the lateral parts there exist only one or two 



eye-spots in its width. The ends of 

 the tract reach posteriorly to about 

 the level of tentacular eye-spots. The 

 brain occupies a position about one- 

 fourth the length of body from the 

 anterior end. 



Body-wall. — The epidermis consists 

 as usual of a layer of columnar ciliated 

 cells, which contain some minute 

 rhabdites and are of a greater height 

 on the dorsal than on the ventral 

 side. The cilia are much more strongly 

 developed on the dorsal side than on 

 the ventral surface. Numerous glands, 

 deeply situated in the body on each 

 side, open to the exterior in a narrow 

 zone of the ventral surface along and 

 just within the body-margin. The 



111 same. J * ° 



basement membrane is fairly well 

 developed. The dermal musculature, situated immediately below it. 

 consists of the externalmost longitudinal, the middle diagonal and the 

 innermost circular layers. 



Digestive System. — The mouth is situated slightly in front of the 

 middle of body and at nearly the centre of the pharyngeal pocket 

 which is of a length somewhat less than one-half that of the body 

 and is provided with at least 12 diverticula corresponding in a general 

 way to the folds of pharynx. The rather narrow main gut, longer 

 than the pharyngeal pocket, gives rise to numerous pairs of lateral 

 branches with occasional, alternately standing outbulgings, which do 

 not undergo anastomosis. The gut-epithelium presents no noteworthy 



Fig. 2. 



Fig. 2. 

 Distribution of eye-spots 



