324 KEV. K, B. WATSON OS THE 



Acores to Mediterranean. (L., Jn., W.) Labra &c. Not 

 rare. — The dentition of this mollusc excludes it, as Kobelt 

 (I. c.) shows, from the genus Pollia as well as from Murex, 

 With Trophon it is further connected by its longish, nar- 

 rowish, bluntly-pointed, oval operculum, which, when seen in 

 its place within the upturned mouth of the shell, has its apex 

 in front towards the point of the mouth, a little incurved 

 towards the pillar-lip, along which the later edge-layers of 

 growth successively lie. In this connection it should be ob- 

 served that in Adams's ' Genera' the opercula, when diversely 

 ended, are turned upside down, and the consequent reversal 

 of right and left side is sometimes corrected by the figure 

 presenting the internal, not the external surface. This 

 mistake is avoided in Woodward's most accurate ' Manual,' 

 but it is widespread and sometimes very perplexing, even 

 Philippi has not escaped it. Dr. Brot is nearly always 

 right, as are also Dr. Kobelt and Dr. Fischer, though in the 

 ' Manual ' of the latter the different position of shells and 

 opercula adopted in the "gravures" and in the "planches" 

 is somewhat confusing. 



361. Troplion Loioei, 1897, Watson, supra, p. 214. 



362. Truncatella subcylindrica, 1767, Linne (as Helix), Syst. 

 Nat. p. 1248. no. 696 (see Hanley, Ips. Lin. Conch, 

 p. 579); Draparnaud (as Cyclostoma truneatulum), Moll, 

 p. 40, i. 28-31 ; Risso (as T. truncatula), Hist. iv. 125, 

 fig. 5; Lowe (as T. truncatula), Zooh Journ. v. 2S0, xiii. 

 13-18; Philippi (as Bissoa), Enumeratio, i. 151. 1, & (as 

 Truncatella) vol. n. 133, xxiv. 3 ; Deshayes (as Truncatella 

 truncatula) in Lamarck, An. s. Vert. 2nd ed. vni. 362 

 (note) ; Pfeiffer, Monog. Auric, pp. 186 & 188 : Grwyn 

 Jeffreys, B. C. iv. 85, ii. 2 ; & v. 209, lxxi. 1. Hal. From 

 Scotland to Mediterranean and Canaries. (L., Jn., W.) 

 Wherever the shore is shingly, even at the Selvagens. 



363. Truncatella Lowei, 1852, Shuttleworth, Diag. New Moll, 

 p. 12 ; Pfeiffer, Monog. Pneumonopomorum, Suppl. 1, 

 p. 7, do. 2, p. 5, do. 3, p 11, no. 14. Hab. Teuerife. 

 (W.) Madeira. 



Turbo and Turbonilla, see Odostomia. 



364. Turbo (Bolina) rugosus, 1767, Linne, Syst. Nat. p. 1231 ; 

 Fischer in Kiener, Iconog. vol. xi. p. 41, xv. 1. Hab. 

 From Bay of Biscay to Mediterranean, Mogador, and 



