2(jQ MISS JANE DONALD ON THE GENEEA [^'^J 1S99, 



V(3ry like M. Loganii, Hall, especially as represented in ' Pal. New 

 York,' vol. ii (1852), pi. Ixxxiii, fig. 4 b, and by Nicholson, in Quart. 

 Journ. Geol. Soc. vol. xxxi (1875) pi. xxvi, fig. 3 ; fig. 4cf, Hall, 

 appears to have a greater spiral angle. None of these figures, 

 however, are sufficiently distinct for satisfactory comparison. 



Locality and Horizon. — This species is fairly abundant in the 

 Silurian rocks, but is rarely well preserved. Salter's type (PL XXI, 

 fig. 15) was in the collection of the Kev. T. T. Lewis, and is now in 

 the British Museum (Nat. Hist.) ; it comes from the Aymestry Lime- 

 stone of Mocktree (Herefordshire). About three and a half whorls 

 are preserved, which measure 52 mm. in length and 25 mm. in width. 

 The specimen mentioned by M'Coy is in the Woodwardian Museum, 

 Cambridge, and comes from the Aymestry Limestone of Leint- 

 wardine (Shropshire). Besides these there are four examples in the 

 Piper Collection, British Museum (Nat. Hist.), from the Aymestry 

 Limestone of Knapp Lane, Ledbury ; three in the Museum of 

 Practical Geology, London, which are all casts and badly preserved, 

 from the Lov/er Ludlow near Ledbury, and the Aymestry Lime- 

 stone of Llanbadock and N.E. Leintwardine respectively; and four 

 much-weathered casts in the Ludlow Museum from the Aymestry 

 Limestone, for which no locality is given. There are about ten speci- 

 mens in the Grindrod Collection, Oxford University Museum, from the 

 Lower Ludlow and one from the Upper Ludlow ; no localities are 

 given, and few of the shells are particularly well preserved ; one 

 (PI. XXI, fig. 16) has the lines of growth very distinct, and another 

 shows the spiral striae all over the surface. An individual in the 

 Museum of the Geological Society of London, from Aymestry, has the 

 surface well preserved, and is figured in PL XXI, fig. 14. It consists 

 of seven whorls ; both the apex and base are imperfect ; its length 

 is 52 mm., and width 20 mm. Lindstrom gives 63 mm. as the length, 

 and 28 mm. as the width. The specimen which he sent me from 

 Gothem is the largest; it consists of about eight and a half whorls, and 

 has the apex broken. It measures 84 mm. in length, and 28 mm. in 

 width. Some of the British examples, if entire, would quite equal 

 these in size. The Swedish forms, according to Prof. Lindstrom, 

 occur rather high up in the geological series, in the uppermost lime- 

 stone, about homotaxial with the Upper Ludlow of Great Britain. 



HoRMOTOMA (?) PiPERi, sp. nov. (PL XXII, figs. 1 & 2.) 



Description. — Shell elongated, turreted. Whorls more than 

 five, increasing at a moderate rate, convex and smooth. Sutures 

 deep. Band probably situated below the middle of the whorl. 

 Aperture imperfectly known. Umbilicus closed. 



E em arks. — There are four specimens of this species in the 

 Piper Collection in the British Museum (Nat. Hist.) ; they are all 

 casts, and show no traces of ornamentation or lines of growth. 

 One shell bears indications of the sinual band on the body-whorl. 

 1 place it in Ilormotoma, on account of its general resemblance to 

 other members of the genus. 



Eesemblances. — This species resembles most nearly E. cingu- 



