380 Zoological Society. 



The animal was first observed and figured by General Hardwicke 

 in 1797. 



The following species belong to the genus: 



Nan. Nemorensis. Helix Nemorensis, Midi. 



Nan. Javanensis. Hel. Javanensis, Ffo. 



Nan. exilis. Hel. exilis, Mull. 



Nan. citrina. Hel. citrina, Linn. 

 Far. Hel. castanea, Mull. 

 Hel. Rapa, Chemn. 



Nan. monozonalis. Hel. monozonalis, Lam* 



Nan. Clairvillia. Hel. Clairvillia, Fer. 



Nan. Vitrinoides. Hel. Vitrinoides, Desk. 



Nanina Juliana. Nan. testd solidd, albd ; spird convexiusculd ; 

 anfractibus depressis fascid mediand brunned, ultimo antice roseo 

 fascid brunned axin cingente ; peristomate rotundato, roseo. 



Axis 1 1, diam. 20 lin. 



Hab. in Ceylon. 



This is one of the most beautiful of the genus. It approaches to 

 Nan. Javanensis, but is thicker and larger. 



Nanina striata. Nan. testd solidiusculd, subpellucidd, albidd ; 

 periostracd tenui, olivaced ; spird convexiusculd, confertim trans- 

 verse striatd j anfractu ultimo antice sublavi. 



Axis 9, diam. 15 lin. 



Mr. Gray also exhibited an extensive series of Shells ot the Genus 

 Terebra, forming part of his own collection, and illustrating an 

 account of many new species of that group which he presented. 



He stated that the animal has a small foot, and a very long 'pro- 

 boscis, at the base of which are seated two very small tentacular the 

 operculum is ovate, thin, horny, rounded behind, and rather taper- 

 ing in front. The shell is covered by a very thin, pellucid, horn- 

 coloured periostraca : it is usually white, variously streaked with 

 brown, the streaks being often interrupted or broken into spots 

 by the two spiral bands of the shell - } one of these bands is placed 

 near the spiral groove and the other on the middle of the whorl. The 

 apex of the cavity is frequently filled up by a calcareous deposition j 

 but this deposition has never been observed in Ter. duplicata. 



The species may be divided into the following sections : 



I. Anfractibus sulco spirali cingulum posterius efformante ; labio in- 

 teriore tenui, concavo. 



Obs. Cingulum in junioribus magis conspicuum j labium internum 

 in adultis rarissimk incrassatum. 



Huic sectioni referendae sunt 



Ter. maculata, Lam. 



Ter. tigrina. — Buccinum felinum, Dillw. 



Ter. strigata, Sow. — Buccinum elongatum, Wood, Suppl.,f. 22. 



Ter. dimidiata, Lam. 



Ter. striatula, Lam. 



Ter.Jlammea, Lam. 



Ter. muscaria, Lam. 



Ter. subulata, Lam. 



