33 



inches. At the lower extremity of it, near the base, 

 are three equidistant rows of waved testaceous frills or 

 ruffles, with a narrow space between them; the upper 

 end terminated with a perforated disk, as in the other 

 species. Among many unique and nondescript shells 

 in the late Earl Tankerville's collection, is an example 

 of this rare species. 



In the above description, the writer has reversed the 

 position of the shell, according to La Marck's idea, 

 having strong grounds to believe the open end always 

 to be downwards in the sandy places in which, at low 

 water, this shell is found. 



[diae 

 Aspergillum Javanum Aspergillum Novae Zeylan- 

 vaginiferum agglutinans. 



CLAVAGELLA. 



Figured in Sowerbys Genera of Shells, No. 13. 

 No recent examples of this genus have yet been seen 

 by La Marck, who considers the Clavagella an inter- 

 mediate species between the Aspergillum and the Fis- 

 tulina, differing from the former by having only one 



