1891.] MR. K. A. SMITH ON SHELLS FROM ADEN. 417 



14o. Cerithium columna, Sowerhy. 



JSab. Red Sea, Indian Ocean, Philippines, Australia, Samoa, 

 Fiji, &c. 



146. Cerithium tuberculatum (Linn.). 



Hab. Red Sea, Indian Ocean, Philippines, Polynesia. 

 For remarks on this and allied species see Report on the 'Alert' 

 Collections, pp. 63, 64. 



147. Cerithium yerburyi. (Plate XXXIII. fig. 4.) 



Testa elongata^ acuminata, alba, lineis transversis nigris interruptis 

 ornata; anfract. 10, convexiusculi, costis longitudinalibus (in 

 anfr. penult. 9, in ultimo tenuioribus circiter 12) lirisque spira- 

 libus {anfr. superioribus 3, in ult. 7-8 aliisque minoribus inter- 

 calentibus) instructi ; apertura obliqua, longit. totius ^ super ans ; 

 labrum extus incrassatum, intus album, leviter liratum ; colu- 

 mella oblique arcuata ; canalis brevis, obliquus. 

 Longit. 19, diam. / millim. 



In this species a few of the costse (about two on each whorl) are 

 more conspicuous than the rest, and one on the left side ot the body- 

 whorl which inferiorly runs into the cauda forms a boundary to it. 

 Between this and the labrum the costse are finer than upon the pre- 

 ceding whorl. The interrupted black lines fall upon the spiral 

 ridges, which on crossing the ribs form more or less acute tubercles. 

 In the interstices between them there are fine parallel strise. C. torresi. 

 Smith, is closely allied to this species, but more slender, and differs in 

 detail of sculpture. 



148. TuKRiTELLA MACULATA, Reeve. 



Hab. China Sea. 



The brown thread-like lines which cover the surface are more 

 distinct in the specimens from Aden than in those from the China 

 Sea. 



149. TuRRiTELLA coLUMNARis, Kiener. 



Hab. Ceylon {Reeve) ; Mergui {Martens). 



The whorls in the specimen figured by Reeve (Conch. Icon. f. 14) 

 are unusually flat. Most examples more nearly resemble Kiener's 

 figure of this species. The granulation of the transverse striae men- 

 tioned by Kiener is very feeble, and can hardly be taid to exist iu the 

 specimens I have examined. Two specimens from Aden are remark- 

 ably short and broad in proportion, so that at first I was inclined to 

 regard them as a distinct species. Their colour and sculpture being 

 the same as the typical form, I now regard them merely as a 

 different growth of the same species. 



150. MiTRULARiA ciCATRicosA (Reeve). 



Calyptrcea cicatricosa, Reeve, Con. Icon. f. 3 a-b. 

 Hab. Philippine Islands {Cuming). 



