2 Art. 3.— T. Kaburaki : 



Procerodes laefea Ij. et Kab. 

 (PI. I„ fig. 1.— Text figs. 1, 4.) 



Numerous specimens of this species were captured l>y the late 

 Professor Ijima beneath stones on the beacli between Yukanki 

 and Meleya in the Saghalin in July, 1906. 



Form. — The shape of the body in the living condition is 

 closely similar to that of Pr. ulvae (Oersted) in the same state. 

 The frontal margin is sub truncate, usually slightly crenate and 

 gently arched 'in the middle parts which spread on each side into 

 an antero-laterally directed tentacle through a gentle concavity. 

 The tentacles are moderately long and slightly rounded at the 

 «nd. The head merges into the trunk, from which it is 

 indistinctly separated by a slight neck-like narrowing. When 

 fully extended, the trunk is elongated and slender, and is of a 

 nearly uniform breadth throughout, beginning to taper gradually 

 from the region of the copulatory organs to the rounded hind 

 end. 



Size. — The specimens in the preserved condition measure 2-4 

 mm. in length and about 1 mm. across in the broadest part of the 

 body at the pharyngeal region. 



Colour. — The body is almost translucent milky white, due to 

 the entire absence of pigments, much as in Pr. lobata (O. Schm.) 

 The intestine and the vitelline glands can be seen with more or 

 less distinctness, being of a reddish or brownish colour. The 

 pharynx and the copulatory organs are also discernible to a certain 

 -extent. 



Eyes. — The crescentic eyes, two in number, are situated well 

 behind the frontal margin and separated from each other by a 

 space somewhat longer than the distance of either eye from the 

 lateral body-margin of the same side. 



Digestive Organs. — The mouth is placed somewhat behind the 

 beginning of the posterior third of the body. The pharynx is in- 

 serted at about the end of the anterior third of the body, being 

 somewhat longer than one-third the body-length. The unpaired 

 anterior main trunk of the intestine usually sends out 7 or 8 pairs 



