.VII. RELIQUIA. 207 



2. HELMINTHOLITHUS 



ni spatangi ovati gibbi 



, > The original known 



ambulacra quatermsf in the recent state. 

 depressis. y 



3. HELMINTHOMTHUS Spinasx 



Echinite,clavate crenu-f Temporarj Species. 



> 1 lie original unknown 



lato-stnate, ap lc e punc-f iu , he recent slate> 

 tat a?. 



The specific character of thp recent species of 

 plant or animal frequently depends on parts often 

 or constantly wanting in the fossil subject Another 

 diagfiosis must then be given to distinguish the reli- 

 quium ; that of the recent species being marked as 

 a parenthesis. 



CONCHYLIOLITHUS MyjE testa ovata postice ro- 

 tundata^ striis transversis subinaequalibus 

 ( cardinis dente antrorsum porrecto, rotun- 

 dato, denticulo laterali). 



The generic and trivial names are prefixed to the 

 specific character And, generally, the name of the 

 family f , or subdivision of the genus, to which the 



f In forming families, or subdivisions under each genus, the 

 reader \vill observe (v. Syst. Arrangement. P. 2.) that we have 

 strictly adhered to the Linnean system and nomenclature, except 

 in a very few instances In one of these, we have ventured to 

 separate from the genus Is is (where Linnreus has placed them) 

 those stellated zoophytes, with crustaceous and generally jointed 

 stems, furnishing the fossil bodies commonly called Entrochi, 

 Asteria, &c. and, considering them, in the recent state, as a 



