380 MELVILL AND STANDEN : SHELLS FROM I.IKU. 



The shell is very graceful and delicate, attenuate, acicu- 

 late, nine whorled, two whorls being apical, the fourth, fifth, 

 and sixth tinged in the lower half with either chestnut, 

 yellow, pale-pink, or left wholly white and unicolorous ; the 

 antepenultimate whorl is often similarly tinged, but the last 

 two whorls are white ; the last is prolonged and straight. 

 Mouth ovate, oblong ; outer lip slightly effuse, thin ; colum- 

 ella one-plaited. A few specimens. 



Allied to O. striata Pease, but the whorls are transversely 

 striate and delicately decussate. It is not a typical Odosto/nia, 

 but our knowledge of that genus and its allies is at present so 

 unsatisfactory, that we do not know precisely where to locate it. 



Elusa gradatula sp. nov. (PL XL, fig. 84.) 



E. testa attenuata, gradata, fusiformi, per-graali, nivea, 

 Icevi, anfractibus decern, turritis, hvvibus, longitudinaliter 

 minute et arete costutatis, costis nitidis, interstitiis per-lcevi- 

 bus ; apertura ovata, labro tenui, columella uniplicata. 

 Lo?ig. 4*50, Lat. 1 '50 mill. 



This shell has some affinity with Pyrgulina pyrgomella 

 Melv., described recently from Bombay. The whorls are ten, 

 attenuate, gradate, very slender, white, smooth, uniformly very 

 finely longitudinally costulate. Columella once-plaited. 



Olivella Williamsi sp. nov. 



O. testa fusiform/', polita, anfractibus sex, apud suturas 

 profundi: canaliculars, et excavatis, per-lazvibus, anfractu 

 ultimo oblongo, catidido,flammis vel lineis fulgetrinis casta ne is 

 concinn'e decorato, apertura augusta, oblonga, labro incras- 

 sato, columella 7-8 plicata. 

 Long. 15, Lat. 7 mill. 



A well-marked, exceedingly pretty Olivella, which is not to 

 be found either in the British Museum, Mr. Williams' collection, 

 or any of the collections, public or private, we have been able 

 to examine. Nor is any mention made of it in Mr. F. P. 

 Marrat's Monograph of the genus in Sowerby's "Thesaurus 

 Conchyliorum." 



J.C, viii.j Apr. 1897. 



