10 Mr. W. C. Williamson on the Recent 



The drawing represents a specimen that is the least so. It is an 

 exceedingly delicate and beautiful species. 



Long. Diam. 



1 1 



~EJ • • • • lJO 



1 1_ 



66 • • • * 200" 



Swansea, very rare, Geo. Barlee, Esq. Boston. 

 Genus Entosolenia, Ehrenberg. 



Serpula {Lagena), Walker, Adams, Turton. Vermiculum, Mont. La- 

 gena and Lagenula, Fleming. Lagenula, MacGillivray, Thorpe. 



Cell calcareous, globose or ovate, sometimes compressed, fur- 

 nished with a tube arising from the upper extremity and pro- 

 jecting downwards into the cavity of the cell. Oral? orifice 

 opening into the tube. 



1. E. globosa. PL II. figs. 13, 14. 



Serpula {Lagena) leevis globosa, Walker, p. 3. tab. 1. fig. 8. 

 Vermiculum globosum, Mont. p. 523. 

 Serpula globosa, Fleming, p. 235. 



Cell ovato-globose, smooth, not compressed, projecting slightly 

 at the upper extremity, in the centre of which projection is the 

 small rounded orifice opening into the internal tube, which is 

 slender, patulous at the extremity, and sometimes reaching nearly 

 to the bottom of the cell. 



When examined under a very high power, this object, like 

 L. leevis, is found to be densely perforated with minute foramina, 

 through which in all probability pseudopodia were protruded. 



In very many cases I am satisfied that specimens of my 

 E. lineata have been mistaken for this very rare form. 



The cabinet of Mr. Bean of Scarborough contains one example 

 of this species, in which two separate cells are united together at 

 the lower part, having each a central aperture at the opposite 

 end. The Lagenula globosa of Thorpe's ' British Marine Con- 

 chology ' is obviously not the L. globosa of Fleming. It is de- 

 scribed as having a long slender neck and is marked with opake 

 longitudinal lines. 



Long. Diain. 



1_ _1 



100 " ' ' - 160" 



1 _J__ 



1 6~E • • • • 170 



1 1 



T6"6" * ' * - 2ll" 



" Sandwich, Mr. Walker," Montagu. Scarborough, Mr. Bean. 

 Portsmouth, Swansea, Mr. J effreys. Mindanao, Philippine Islands, 

 and fossil in a miocene tertiary stratum, Petersburg, U.S., Dr. 

 Bailey. Boston, March, the Levant. A rare species on the Bri- 

 tish coasts. 



