274 K. MITSUKURI : STUDIES OX 



high spire with eight or more cross-beams. The tables become 

 incomplete in the body proper, their disk being generally smaller 

 and tri-loculate and their spire more or less incomplete. 



In Spec. No. 1665, which seems to be an older individual than 

 Spec. No. 1129 as is clear from its larger size, thicker skin and 

 deeper color, tlae calcareous deposits are much scarcer than in 

 the latter si^ecimen, while its skin is packed full of wine-red 

 corpuscles. The tail portion alone exhibits calcareous tables in 

 larger numbers. Here all the tables have a lozenge-shaped disk 

 which shows many holes in the enlarged middle parts and is 

 produced into two points at each end. The spire consists of three 

 pillars which are generally broken off near the base. The wine- 

 red corpuscles are rather few in the tail ; hence the light color 

 of that part. The whole body, with the exception of the tail, is 

 packed quite thickly with these corpuscles ; moreover the stages 

 of transformation, such as were seen in Spec. No. 1129, from 

 calcareous deposits to these corpuscles, are hardly discernible. 

 Tables in the same parts of tlie body are few and far between. 



In Spec. No. 1666, the calcareous deposits show some 

 differences from those of the two specimens described above, but 

 I believe one is justified in placing tlie tliree specimens in the 

 same species. The tail portion is again full of calcareous tables. 

 These have lozenge- shaped disks with four or more holes. The 

 spire, which consists of three pillars, is generally low even when 

 complete, and ends in some teeth, but it is usually found broken 

 ofT. ^Vround the anus, there are five large perforated calcareous 

 plates. In the body above the tail, the calcareous tables have the 

 disk more complete than in corresponding parts of the two last 

 mentioned specimens. The disk is rather delicate and is found 

 in different stages of transformation into the wine-red substance. 



