108 K. MITSUKUKI : STUDIES ON 



ing to Theel, " The rosettes in the body-wall itsoK are mostly 

 very incompletely developed, either resembling simple X-shaped 

 bodies, or oval grains with incisions at their middle, or rounded 

 grains with or without perforations, or even rods with a series of 

 rounded prominences on each side " (p. 203). Of the same bodies 

 Lampekt says : " Krause und rosettenformige Korper. In der 

 Bauchhaut rundlicho Ellipsoide." Skin soft to the touch. Anus 

 stellate, owing to 5 groups of small papillae : sometimes not dis- 

 tinctly stellate. Polian vesicles 1 — 5, or 7. Stone-canal very small, 

 attached to the mesentery. Cuvierian organs present. 



Remarks : — At least two of the specimens before me may, I 

 think, with a great degree of certainty be identified as belonging 

 to this species. Sopecimen No. 1216 was collected by myself and 

 observed while living and is now in a very good condition of 

 preservation. Therefore the following description for the most 

 part is founded on it. 



When living, it was 40 cm. long and 14 cm. broad. h\ the 

 present contracted state, it is 27x9 cm. large. Dorsum and ven- 

 trum are very differently colored. The ground color of the former 

 is brown. It becomes darker or lighter according to the state of con- 

 traction. On this are scattered many large irregular patches of 

 ochre-yellow color without any regularity of occurrence. The 

 smaller of these patches are circular in shape, being as small as 

 0,5 cm. in diameter. The larger ones may measure several centi- 

 meters across and are of an irregular amaboid shape, many of 

 them appearing as if formed by the running together of smaller 

 circular patches. The patches show a thin well-defined rim of 

 dark browm chestnut around the ochre-yellow central area. In the 

 small circular patches a padilla, somewhat larger than the ordi- 

 nary pedicels, i-ises from the centre. Such patches therefore look 



