59 



anfi'actibus depressis fascid vtediand brunned, ultimo anticet roseo 

 fascid brimned axin cingente ; peristomate rotundato, roseo. 

 Axis 1 1, diam. 20 liti. 

 Hab. in Ceylon. 



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

 iVan. Javanensis, but is tiiicker and larger. 



Nanina striata. Nan. testd solid'msculd, subpellucidd, albidd ; 



periostracd tenui, olivaced ; spird conveziusculd, confertim trans- 



verse striatd ; anfractu ultimo antici sublavi. 

 Axis 9, diam. 15 lin. 



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



G^nus Terebka, 



fortning part of his own ^ collection, and ilhistrating 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 tentacula ; the 

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

 inginfront. The shell is covered by a very thin, pellucid, horn- 

 coloured periostraca : it is usually white, variously streaked vvith 

 brovvn, the streaks being often interrupted or broken into spots 

 by the two spirai bands of the shell ; one of these bands is placed 

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

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

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



The species may be divided into the follovving sections : 

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

 teriore tenui, concavo. 



Obs. Cingulum injunioribus magis conspicuum j labiuminternum 

 inadultis rarissim^ incrassatum. 



Huic sectioni referendae sunt 



Ter. maculata, Lam. 



Ter. tigrina. — Buccinum felinum, Dillw. 



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



Ter. dimidiaia, Lam. 



Ter. striatula, Lam. 



Ter. Jlammea , Lam. 



Ter. muscaria, Lam. 



Ter. subulata, Lam. 



Ter. oculata, Lam. 



Ter. crenulata, Lam. 



Ter. corrugata, Lam. 



Ter. duplicata, Lam. 



Ter.pertusa, Sow. Born, Mus., t. 10. f. 13. 



Ter. nubeculata, Sow. 



Ter. myvros, Lam. 



f Terebra Knorrii. Ter. testd turritd, subulatd, acuminatd, solidd, 



