51S 



The animals of two or three fpccles we have examined^ 

 are not the lead Hke any thins; obferved in the p-enus 

 Serpula ; when aUve they rarely protrude any thing be- 

 yond the fliell ; but Avhen recently dead, a flclhy bulb, 

 v.-ithout any vifible tentacula, or feelers, makes its ap- 

 pearance ; but hitherto \i'e have not been able to fix 

 any thin^ as definable chara6lers. 



* SUB-COXVOLUTED. 



1. 

 IxcURVATCM. Serpula incurvata. Turt. Li?:, iv. p. 609. 



Adams Microfc. t. 14. f. 7. 

 Serpula recia anfraftibus tribus contiguis regulariter involutis, 



n'aJk. Min. SheJh. f. 11. 



The ftrait horn "Wormfliell, with three clofe intorted 

 fpires at the tip; the colour white, femi-tranfparent. 

 From Sandzcich, rare. 



This fhell is fomewhat in fliape like Kautilus femilitu' 

 2^j of LiKN^us ; but is perfeftly fmooth, cvlindric, and 

 has neither Syphon in the aperture, nor internal conca- 

 merations. Length fcarce one line. 



o 



Pervivm. Serpula recla umbilico pervio anfraclu aplcis unico Involuto. 



Walk. Min. Shells, f. 12. 



The fingle-fpired ftrait horn Wormfliell, with a per- 

 vious 



