CONCHOLOGY. 121 



S. lineata.* S. multistriata.* 



S. subulata.* S. turbinata.* 



2. Genus Vermetus. PI. XI. 



Animal. As preceding genus. 



Shell. Very similar to the Serpula, but the organization of 

 the animal makes it a distinct genus ; often found clustered to- 

 gether, and attached to marine substances ; conical, thin, tubular, 

 loosely spiral, aperture straight, circular, edges sharp and com- 

 plete, several partitions not perforated towards the summit, oper- 

 culum horny and complete. Inhabits the sandy shores of the W. 

 Indies and Africa. Two species. 



Vermetus lumbricalis. Vermetus raaximus. 



3. Genus Uelphinnla. PI. XI. 

 Animal. See Scalaria. 



Shell. Thick, and pearly in the interior, subdiscoid or conical ; 

 spiral whorls rough or'angular, often detached, spiny ; large umbi- 

 licus, sometimes triangular ; the margins united, mostly fringed 

 or ventricose. Inhabits the Indian and American seas. Five 

 living species. Seven fossil. 



Delphinula laciniata. Delphinula distorta. 



D. turbinopsis. D. rugosa. 



D. laxa.* 



FAMILY XVI. 

 TuRBiNACEA. Eight genera. 

 1. Genus Solarium. PI. XI. 



Animal. Unknown. 



Shell. Orbicular, depressed, umbiUcus large and conical, crenu- 

 lated or dentated on the inner margin of the whorls ; aperture 

 not modified by the last whorl of the spire, which is entirely flat ; 

 no columella. Inhabits the Indian seas. Seven living species. 

 Eight fossil. 



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