XX. 
D. PTENOGLOSSA. 
Tanthinide. 
Janthina, Bolten, 1788. 
(typical species, I. nitens, Menke). 
I. rotundata, Leach. 
Scalidee. 
Seala, Humphrey, 1797. 
(first species S. clathrus, L.) 
Those interested in the reasons for preferring this name to Scalaria 
will find a valuable discussion by Dr. Dall in his “ Mollusca of the Blake 
Expedition,” 1889, pp. 299-307 ; our British species are well known. 
Aclis, Lovén, 1846. 
(type) A. supranitida, S. V. Wood. 
Perhaps Graphis, Jeffreys, might be used as a sub-genus for A. unica, 
Mont., and Pherusa, Clark, for A. Gulsone. 
E. GYMNOGLOSSA. 
Eulimide. 
Eulima, 2isso, 1826. 
Risso’s first species is Z. elegantissima, which, fide Jeffreys, = E. 
polita, L. 
Stilifer, Brod, 1832. 
Stylina, Fleming, which is earlier, is preoccupied by Lamarck. The 
proper name of our species is Stilifer stidifer, Turton, which is earlier 
than S. Turton, Brod. 
Pyramidellidae. 
Odostomia, Fleming. 
The grouping and correct generic title for this group is under consider- 
ation. 
Turbonilla, Risso, 1826. 
(type T. plicatula, Zisso). 
This would include all the species near lactea, L. 
Eulimella, Forbes, 1846. 
(type) E. seillee, Scacchi. 
Includes also E. acicula, Xe. 
