MOLLUSCA 297 
To554 Caveza Wage A. Adams, Gen, Rec. Moll. 1. p.. 132. 
MOSQeweasi7 a, WdeOn EN. NGATMS, «21.6. Pp. 137. 
1855. Auriculella Pfeiffer, Malak. Blatt. 1. p. 3. 
ROS 5a Livuceedia. Pieler 2. 6p. 3: 
1860. Apex Martens, Die Heliceen, p. 248. 
1870. Edurnella Pease, P. Zool. Soc. London, 1869, p. 647. 
1870. Perdicella Pease, ¢. ¢c. p. 649. 
1875. Carinella Pfeiffer, Novit. Conch. tv. p. 116. 
1899. Thaanumia Ancey, P. Malac. Soc. London, 11. p. 269. 
1899. Baldwinia Ancey, ¢. ¢. p. 270. 
Mr Pilsbry’s remark, that the use of Férussac’s term /7eZzcteres “ would open the 
door to an endless series of vagaries in nomenclature,” appears to me to be thoroughly 
justified ; for the converse view see Pease, P. Zool. Soc. London, 1862, p. 3. The 
Achatinella of Schliiter (1838) appears to be a mixture of Aerussacza and allied groups. 
Our knowledge of the anatomy is due primarily to Bland and Binney, who pointed 
out that the Achatinellidae may be divided into two main groups based on the cha- 
racters of the radula and jaw; also that Cave/za, while it agrees in the radula with the 
Leptachatina and Amastra group, differs in the characters of the jaw. Heynemann has 
also written on the subject, and recently notes have been published by Messrs Gwatkin, 
Pilsbry and Suter. Mr Pilsbry has recently! stated with reference to Partuda and 
Achatinella that “these forms have no relations with the Bulimulidae and Achatinidae, 
with which conchologists associate them, but lie at the base of the terrestrial pulmonate 
teow 
The classification here adopted is: 
Genus Achatinella. Subgenn. Achatinella s.s. (Syn. Apex.) Bulimella. Partu- 
lina. (Syn. Baldwinia.) Achatinellastrum, (Syn. Lburnella.) 
Genus Perdicella. 
Genus evwcomnbta. 
Genus Amastra. Subgenn. Amastra s. s. Laminella. Amastrella, n. subgen. 
Kauaia, n. n. | Cartnella, Pfr., nec Sby. | 
Genus Lefptachatina. 
Genus 7haanumta. 
Genus Carelza. 
Genus Auriculella. 
Genus /rickella. 
1 Ann. nat. Hist. tv. (1899), p. 156. 
