162 PYRAMIDELLID^. 



rest of the shell is as usual in the typical form. The 

 Milford specimens appear also to be intermediate. 



The variety is the Turritella indistincta of Fleming, 



T. interrupta of Totten, and Eulima decussata of Mac- 



gillivray . py M .,fcl.V mt~4h*(r*tHH) 



\\--[\>' 29. O. RUFA*, Philippi. 



Melania (afterwards Chemnitzia) rufa, Phil. Moll. Sic. i. p. 156, t. ix. f. 7. 

 C. rufa, R & H. iii. p. 245, pi. xciii. f. 4. 



BODY of a clear pale-azure colour, irregularly aspersed with 

 snow-white flakes : snout extending from the conjoined ten- 

 tacular membrane to a little beyond the foot, and forming a 

 sort of head- veil ; it is long, flat, and bilobed : tentacles short, 

 broad, very little folded, and diverging ; tips rounded : eyes 

 placed on the inner bases of the tentacles : foot large, mode- 

 rately long, auricled in front, tapering behind to a point when 

 at full stretch, but rounded when at rest. (Clark.) 



SHELL forming an attenuated cone, moderately solid, opaque, 

 and glossy : sculpture, narrow and shallow longitudinal ribs, 

 from 20 to 30 on the body- whorl ; they are nearly straight, 

 and never reach the base, being sharper and more distinct on 

 the upper whorls ; their interstices are crossed, and the base 

 encircled, by rather broad impressed lines, of which there are 

 from 8 to 10 below the periphery, and 4 to 6 above it ; these 

 lines, when magnified, appear double, or sometimes composed 

 of several threads ; the whole surface is covered with micro- 

 scopic and close-set striaB in the line of growth ; nucleus 

 quite smooth : colour pale-fawn or tawny, with frequently a 

 narrow reddish-brown or orange band round the middle of 

 each whorl: spire greatly elongated, tapering to a rounded 

 point which forms the nucleus ; this is remarkably prominent 

 and exposes the reversed and compact spire of the embryo, 

 which bends downwards on the first regular whorl in various 

 directions: whorls 10-13 (exclusive of the nucleus), convex 

 although more or less compressed, and gradually enlarging ; 

 the last occupies from a third to a fourth of the shell : su- 

 ture narrow and deep, slightly oblique : mouth irregularly 

 rhomboidal, acute-angled above and expanded below ; length 

 from a fifth to a sixth of the spire : outer lip somewhat con- 

 tracted, very little incurved below the periphery : inner Up 



* Eeddish. 



