1884.] 



' Porcupine ' Exp. 18/0 : Atl. St. Tangier B. Two specimens. 



Distribution. Algiers, a fragment {Joly, f. Monterosato), Palermo, 

 a fragment {Monterosato) ; 1 C3| fms. 



This species differs from O. indistincta in having fewer and larger 

 ribs with more numerous and much finer spiral striae ; the whorls 

 are not so convex, and the suture is consequently sligliter or shallower. 

 But I must admit that it is not a satisfactory and well-established 

 species. 



V 30. Odostomia flexuosa', Jeffreys. (Plate XXVI. fig. 10.) 



Shell oblong, rather thin, semitransparent, and glossy : sculpture^ 

 sharj) and flexuous longitudinal ribs, of which there are about 20 on 

 the last whorl and 15 on the next or penultimate whorl ; these 

 commence in a nodose and abrupt manner from just below the suture, 

 and almost disappear at the periphery, where they are crossed by a 

 few spiral strife : colour white : spire turreted ; apex truncated : 

 whorls 5, compressed ; the last occupies more than half the shell 

 with the mouth placed upwards : suture narrow but distinct, nearly 

 straight : mouth oval, inflected above and rounded below : obiter lip 

 angular above and gently curved in the niiddle : inner lip filmy on 

 the upper part and reflected on the lower part of the pillar, behind 

 which is a small and narrow chink. L.0"1. B. 0*05. 

 ' Porcupine' Exp. 18/0 : Med. St. 5.5. Two specimens. 



1/ 31. Odostomia clathrata, Jeffreys. 



O. clathrata, Jeffr. in Ann. & Mag. N. H. 2nd ser. ii. p. 345 : 

 B. C. iv. p. 148 ; v. p. 212, pi. Ixxiv. f. 9. 



'Porcupine' Exp. 1870: JNIed. St. Adventure Bank (fragment). 



Distribution. Birterbuy B., Conneinara {Barlee and J. G. J.), 

 throughout the Mediterranean and Adriatic, Madeira {Watson), 

 Canaries (McAndrew) ; 20-25 fms. 



Fossil. Miocene : Vienna Basin (Coll. Homes in mus. Vind.) ! 

 Pliocene : Monte Mario and Sicily. 



(/ 32. Odostomia scalaris, Philippi. 



Melania (afterwards Chemnitzia) scalaris, Phil. Moll. Sic. i. p. 157, 

 t. ix. f. 9. 



O. scalaris, B. C. iv. p. 160 ; v. p. 213, pi. Ixxv. f. 7, and var. 8. 



'Porcupine' Exp. 1870: Atl. St. Vigo B. ; Med. 45, Basel 

 Amoush. All typical specimens. 



Distribution. Typical form : Norway {McAndrew), Unst, in 

 Shetland (J. G. J.), western and southern coasts of England and 

 Ireland, northern and western coasts of France, Spain and Portugal, 

 Mediterranean and Adriatic, Madeira; 8-108 fms. Var. rxifescens. 

 Finmark southwards to the Hebrides and county Antrim ; 10-90 



fms. 



Fossil. Pliocene : Coralline Crag and Italy. Post-tertiary : 

 Norway (var. rnfescens) ; 70-100 feet. Not Odontostoma scalaris of 

 Sandberger from the Mayence B;isin. 



' HaviiiK flexuous I'ilw. 



