GO 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. 

 ObUngus, 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 .Tornatellatorndtilis. — Shell ovato-conical, subcylin- 

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

 the last turn longitudinally 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. 

 Pellucidns, 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. Pusillas, 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 SigarHus* 



Genus 1. Velutina. — Shell ovate or roundish, convex, 

 with a diminutive spire, and extremely large, roundish, 



