30 K. MIÏOUKUKI : STUDIES OX 



diameter. They occur in the posteriormost parts which extend 

 on the dorsal surface about half a centimetre and on the 

 \entral surface about 2 cm., in front of the posterior marginal 

 border. So far as 1 can ascertain, they are not found in the 

 lateral margins of the body, nor in the marginal border in front 

 of the head. Sup}«rting rods (n) are found in the pedicels 

 and papillae. They are large in the ventral pedicels, the smallest 

 measuring 0.38 mm. They are roughened at the ends. In the dorsal 

 papillae the rods are shorter and more slender, being only 0.17 

 mm. long. Well developed end-plates are found in the ventral 

 pedicels. They are imperfect in the dorsal papillae. 1 can lind 

 none in the marginal papillae. 



Remarks : — This species is very close to Bathijplotcs rubicundiis 

 Sluiïer, but there are some differences : — - 



(1) The most important difference lies in the presence of 

 the large irregular calcareous bodies in the posteriormost parts 

 of the body in the present species. Sluiteü makes no mention 

 of such bodies in B. ruhicundus. 1 think it barely possible that 

 Sluiter overlooked these bodies. 



(2) In the new sj)ecies there are 20 tentacles, all alike in 

 size, while for B. ruhicundus it is distinctly stated by Sluiïek 

 that there are only 12 short tentacles, of which the two ventral 

 ones are much smaller than the others. 



(3) The color of body in my species is carmine red, while 

 B. ruhicundus, to judge from the sketch given by Sluiter, is 

 brick red. 



(4) The longitudinal muscle is distinctly divided into 

 two in my species, while it is said to be undivided in B. 

 ruhicundus. 



(5) Marginal papillae are niucli larger than dorsal }ja}>illae 



