60 MALACOZOA. GASTEROPODA. PECTINIBRANCHIATA. 



nearly a third of the whole length, with a small plait. 

 Named after Miss Anne Macgillivray. 



10. Odostomia obUnga. Shell oblong, subcylindrical, 

 of five flattened turns, the last two finely ribbed, the 

 spire very obtuse, the suture distinct, the aperture ovate. 

 Obldngus, much longer than broad. 



GENUS 10. TORNATELLA. Shell ovato-conical, subcylin- 

 drical, spirate, the spire short and pointed, the aperture 

 oblong, very narrow behind, the peristome incomplete, 

 the outer lip thin, the columella with an obtuse plait. 

 Name from Torndtus, fashioned in a turner's wheel. 

 Lamarck. 



1 . Tornatellatornatilis. Shell ovato-conical, subcylin- 

 drical, moderately thick, glossy, with the spire convex, 

 the last turn longitudinaUy crenato-striate, pale red, with 

 two white bands, each margined with two reddish purple 

 lines. 



2. Tornatella pellucida. Shell ovato-conical, sub- 

 cylindrical, very thin, transparent, glossy, with the outline 

 of the spire straight, the last turn longitudinally punc- 

 tato-striate, with two deeper striae along the suture, the 

 colour hyaline white, with three faint reddish bands. 

 Pellucidus, transmitting light. 



3. Tornatella pusilla. Shell ovato-conical, subfusi- 

 form, very thin, transparent, glossy, with the spire ob- 

 tuse, the last turn distantly punctato-striate, the colour 

 hyaline white. Pusillus, diminutive. 



FAMILY V. SIGARETINA. 



Animal with the body slightly spiral, the head with 

 a frontal veil ; large conical tentacula, with eyes at their 

 outer base ; the foot oval, very large and thick. Shell 

 oval or roundish, external, much depressed, with a very 

 small spire, and large aperture, without columella. Name 

 from the genus Sigaretus. 



GENUS 1 . VELUTINA. Shell ovate or roundish, convex, 

 with a diminutive spire, and extremely large, roundish, 



