SUPPLEMENT. 
329 
Jovellania Murrayi. — a. Fragment of the septate part of the shell, the 
centre of which has been cut so as to expose the siphuncle ; in the latter is 
seen a peculiar dark brown deposit, which is probably of organic origin ; 
this is present also in another specimen near the apical extremity of the 
shell, and in this case it is of varying thickness ; in yet another specimen 
the deposit is absent altogether, h. Dorsal aspect of the lower half of the 
same specimen, to show its convexity on this side. c. Section of the larger 
extremity of b, showing the position of the siphuncle. All of the natural 
size. Drawn from a specimen in the National Collection. 
Fig. 50- 
