304 EET. E. B. WATSON ON THE 



Tbis species is poorly represented by two small ratber 

 damaged sbells and a somewhat broken but well-grown 

 specimen whose dorsal margin-line is straigbter than 

 usual, and in that respect resembles P. brevifrons, Phil., 

 which, however (/. Monterosato), cannot reckon as a 

 species. 



245. Pleurotoma (Mangelia) anceps, 1830, Eichwald, Naturhist. 



Skiz. Lithauen &c. p. 225 : Gwyn Jeffreys, B. C. (as 

 Defrancia teres) TV. 362, & v. 219, lxxxviii. 5. Sab. From 

 Lofotens to Mediterranean and Canaries. (M., Jn., W.) 

 Funchal, Punta de Sao Louren§o, 30 to 40 fms. Not 

 common. 



246. Pleurotoma (Mangelia) gracilis, 1803, Montagu (as Murex), 



Test. Brit. p. 267, xv. 5 ; Gwyn Jeffreys, B. C. rv. 363, 

 v. 219, lxxxviii. 6. Sab. Gt. Britain to Mediterranean and 

 Canaries. (M., L., N., Jn., W.) From Magdalena to Punta 

 de Sao Lourenco. Common. 



247. Pleurotoma (Clathurella) histrix, 1832, Cristofori & Jan, 



Catalogus Conch. Foss. p. 10 ; Gwyn Jeffreys, Ann. & Mag. 

 Nat. Hist. ser. 4, yi. 82 ; Brugnone, Pleur. Foss. Palerai. 

 p. 28, i. 21 ; Bellardi, Moll. Terz. Piemonte, vol. n. 266 ; 

 Monterosato, Enumeratio, p. 46. Sab. Mediterranean. 

 ( Jn., W.) Funcbal, Punta de Sao Lourengo. Very abundant. 



248. Pleurotoma (Mangelia) incrassata, 1837, Dujardin, Me*m. 

 Tour. p. 292, xx. 28 ; Philippi, Enumeratio, n. 168, xxvi. 6. 

 Sab. Mediterranean. (Jn., W.) Funchal, Punta de Sao 

 Lourengo. Bare. 



249. Pleurotoma (Clathurella) Leufrogi, 1828, Michaud,Bull. Soc. 



Linn. Bord. n. 121, i. 5, 6 ; Gwyn Jeffreys, B. C. iv. 3(56 ; 

 & v. 219, lxxxix. 1. Sab. From Norway to Mediterranean 

 and Canaries. ( Jn., W.) Funcbal, Punta de Sao Lourengo, 

 Porto Santo. Very abundant. 



250. Pleurotoma (Clathurella) linearis, 1803, Montagu (as 

 Murex), Test. Brit. i. 261, ix. 4 : Gwyn Jeffreys, B. C. iv. 

 368, vii. 1 ; & v. 220, lxxxix. 2. Sab. From Iceland and 

 Northern Norway to Mediterranean and the Canaries, 

 (M., L., ~W.) From Funchal to Punta de Sao Lourengo and 

 Porto Santo. Very abundant. 



251. Pleurotoma (Mangelia) nebula, 1803, Montagu (as Murex), 

 Test. Brit. p. 267, xv. 6 • Jeffreys, B. C. iv. 384 ; & v. 220, 

 xci. 1. Sab. From North Norway to Mediterranean and 



