difcQvered on the Coajl of Pembroke/hire^ &c. 67 



Helix. Sy/I. Nai. 328. 

 tubulatus. I. H. tribus anfraftibus longitudinaliter ftriatis. 



Obf. Singularis hacin fpecie eft conftrudlio, nam 

 tefta, umbilici loco, tubo marginato qui extra teftae 

 fupeificiem extenditur, inftru6ta eft. Fig. 35, 36. 

 variegata. 1. H. tefta lasvi quatuor anfraftibus, primo ventrico- 

 fiore, lineis rubris notatis. . 



Obf. Bafi imperforata. Tefta fubpellucida, aper- 

 turas margine patentiflima. 



NERlTii. Syji. Nat. 329. 

 fellucida. I. N. tefta Isevi pellucida, anfra(Sllbus tribus. 

 alba, 2. N. tefta lasvi fubpellucida, duobus anfradibus. 



The following Marine Animal appears to confl:itute a new genus 



among the Vermes Zoophyta. 



Derris. 

 Gener. Char. Corpus teres articulatum ; os terminale, tentacula 



duo. 

 fanguinea. D, — Tab. 13. y^ i, 2» 



Obfervaiions. 



THIS fingular animal is of a cylindrical form, gradually de- 

 creafing to the anus, and terminating in an acute point. It is com- 

 pofcd of joints, and capable of the greateft flexibility: the body is com- 

 pofed of an external membranaceous tranfparent coat, that furround* 

 the internal parts ; which -are rendered vifible by the pellucidnefs 

 of the covering. The head is extended beyond the outer Ikin, and 



K a is 



