54 



ART, 2. — H. MATSUMOTO 



smaller in smaller speci- 

 mens. Three of the above 

 specimens are six-armed, 

 but there is no trace of 

 schizogony. On either side 

 of the oral angles, there 

 are several flat, smooth 

 pavement-like granules, 

 'which are however not 

 very distinct. Sometimes, 

 there occur one or two 

 papilliform grains below 

 the teeth. The colour 

 is white in alcohol, or 

 brown, if the specimens 

 have not lain in alcohol 

 for a Ions time. 



Fig. IS. Asteros-chemn (Ophiocreds) glutlncmmi. a. ^^^ AstrOCei'US, AsteiO- 



From above. x§. h. From nbove. x|. c. From schema and TricIlClster, the 

 bf'lo^\'. X 3. 



generative glands extend 

 into the arms as ribbon- shaped bodies, and as a consequence, the 

 arms present certain peculiar features. The parts of the arms 

 containing the generative lobes are more or less widened, quadran- 

 gular in transverse section," strongly knotted, and has a conspicu- 

 ous dorsal median groo^e. In Astroceras and Aster oschema, there 

 arc two pairs of generative glands in each arm, and tlie parts 

 containing them present a knotted appearance, owing to the pre- 

 sence of transverse ridges on either side. In .the first named 

 genus, these ridges are formed by bar -like plates, but in the latter 



