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A paper was read comprising " Descriptions of a few Invertebratecl 

 Artimais obtained at the Isle of France," by Robert Terapleton, 

 Esq. It was accompanied by coloured dravvings of the new species 

 described in it, vvhich were exhibited. 



Of these animals two belong to the Radiated division of the ani. 

 mal kingdom. They may be characterized as follows : 



AcTiNiA SANGUINEO-PUNCTATA. Act. Jlavescetiti-rufescens, 

 punctis sanguineis confertis per series longitudinales numerosas 

 dispositis ornata ; ore guttis cceruleis qmnque circundato ; tenta- 

 culis viridescentibus, hyalinis. 



Hab. vix uncialis, super saxa. 



Xenia Desjardiniaiv'a. Xen. pallide livido-ccertdea ; polypis 

 8-, rariiis 9-radiafis. 



Hab. super lapides prope Black River. 



The mass from vvhich the polypes arise is spread over the sur- 

 face of the stones to the extent, in many places, of more than a foot. 

 It is usually about an eighth of an inch in thickness, and appears to 

 be composed of an infinite interlacing of tubular stems. From the 

 sides of these stems are given ofFpeduncles, each of vvhich termi- 

 nates in a disc having a centrai mouth and eight (rarely nine) rays. 

 These rays are simple on their under or outer surface, pectinated 

 along their edges, and furnished on the upper or inner surface with 

 short processes, having cupped or sucker-like extremities. The 

 discs are perpetually in motion, waving from side to side as though 

 in search of objects ; and \vhen anything comes in contact vvith 

 their rays or tentacida, the suckers instantaneously ciose in upon it, 

 and the tentaculum doubles itself up likę a finger and conveys the 

 prey to the mouth : if the object be large, two or three of the tenta- 

 cula are employed. \Vhen the prey is so large as not to admit of 

 its being s\vallowed, the tentacida relax their hold and allow it to 

 escape. 



The remaining two belong to the Annulose type, and appear to 

 represent two genera among the Annelida, nearly allied to the 

 SerpulidcB. 



Anisomelus. 



Os tentaculis simplicibus octo, per paria dispositis, filiformibus, 

 prehensilibus instructum. 



Branchice? si«iplices, tentaculiformes, pedibus haud muito longi- 

 ores, in segmentis corporis quatuor anterioribus sitae. 



Teita cylindrica, calcarea, erecta, ad basin in saxis immersa. 



Obs. Numero et symmetria tentaculorum, necnon branchiarum 

 simplicitate?, a Terebelld caeterisque generibus affinibus distinguitur. 



Anisomelus luteus. 



Long. corporis vix 4 unc. 



Hab. in saxis corallinis apud Black Kiver. 



