Vol. 65.] THE GENUS LOXONEMA. 225 



Locality and horizon. — The specimen in the Oxford University 

 Museum occurred at Ledbury, in the Lower Ludlow. The others 

 come from the Wenlock Shale of Dudley. The holotype is from 

 the Wenlock Limestone. 



PcHABDOSTROPnA STOKEI, Sp. 110V. (PI. XI, fig. 7.) 



Diagnosis. — Shell composed of numerous whorls. Whorls 

 flattened below the suture, then convex, smooth. An obscure band 

 is situated on the body-whorl about two-thirds of the height from 

 the base, limited above by a strong thread ; and there is another 

 strong ; thread immediately below the suture. Suture apparently 

 greatly inclined. Lines of growth strong, curving very obliquely 

 backward above, forming a shallow sinus, and then advancing with 

 but a slight degree of obliquity. 



11 em arks and resemblances. — I am acquainted with only 

 one specimen of this species, which is in the Lightbody Collection, 

 Manchester Museum ; it is a mere fragment, consisting of the 

 body-whorl and a portion of the penultimate, which are crushed and 

 embedded in the matrix. The lines of growth are very distinct on 

 the body-whorl, and may be clearly traced passing over tho band : 

 only forming a shallow, and not a deep tongue-shaped sinus, as 

 in Hormotoma, Salter, and Sinuspira, Perner. I therefore place it 

 in the subgenus Ehabdostrojoha with lih. grindrodi and llh. pseudo- 

 fasciata. It greatly resembles the latter, but may be distinguished 

 by its smaller size, and probably more slender form ; by having a 

 strong thread at the suture ; and by the lines of growth curving 

 backwards more obliquely above. It differs from the former by the 

 last-named characteristic, as well as by the higher and less convex 

 whorls. It is, however, difficult to make a just comparison, owing 

 to the specimen being fragmentary and crushed. 



Dimensions. — The length of the fragment, consisting of two 

 whorls, is 22 millimetres, the width being 12 mm. 



Locality and horizon. — Under Stoke Wood, in the Lower 

 Ludlow. 



Subgenus Stylonema, Perner, emend. 



Stylonema, J. Perner, 1907, 'Syst. Sil. Centre Boheme' pt. i, vol. iv, Gasteropodes, 

 tome ii, p. 325. 



Diagnosis. — Shell greatly elongated, turriculated, nearly cylin- 

 drical, composed of numerous whorls. Whorls convex, low. 

 Sutures but little inclined. Lines of growth slightly sinuated. 



G e n o t y p e. — Loxonema potens, Barr. 



Remarks and resemblances. — This subgenus was formed 

 by Dr. Perner, for shells differing from Loxonema sensu stricto iu 

 being as a rule of greater size, in having broader whorls, nearly 

 horizontal sutures, and less sinuated lines of growth. He mentions, 

 however, that some species appear to be intermediate, having the 

 strongly sinuated lines of growth of Loxonema s. str., while bearing 

 the other characteristics of Stylonema ; others again have the general 

 form of Loxonema s. str., but at the same time they possess the 

 slightly curved lines of growth of Stylonema, 



Q. J. G. S. No. 258. q 



