MOLL use A 



297 



1855 

 1855 

 1855 

 1855 

 i860, 

 1870, 

 1870, 



1875 

 1899 

 1899 



Carelia H. & A. Adams, Gen. Rec. Moll. 11. p. 132. 



Ainastra H. & A. Adams, /. c. p. 137. 



Auriculella Pfeiffer, Malak. Blatt. 11. p. 3. 



Frickella Pfeiffer, /. c. p. 3. 



Apex Martens, Die Heliceen, p. 248. 



Ebiirnella Pease, P. Zool. Soc. London, 1869, p. 647. 



Perdicella Pease, /. c. p. 649. 



Carijiella Pfeiffer, Novit. Conch, iv. p. 116. 



Thaanumia Ancey, P. Malac. Soc. London, iii. p. 269. 



Baldwinia Ancey, /. c. p. 270. 



Mr Pilsbry's remark, that the use of Ferussac's term Helicteres " 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 Ferussacia 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 Carelia, 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 Pariula 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 

 tree." 



The classification here adopted is : 



Ganw?, Achatinella. Suhgenn. Achatinella s. s. [Syn. Apex.) Bidimella. Partu- 

 lina. (Syn. Baldzvinia.) Acliatinellastrum. (Syn. Eburnella.) 



Genus Perdicella. 



Genus N^ewconibia. 



Genus Amastra. Subgenn. Amastra s. s. Laminclla. Amastrella, n. subgen. 

 Kauaia, n. n. \_Carinella, Pfr., nee Sby.J 



Genus Leptachatina. 



Genus Thaanumia. 



Genus Carelia. 



Genus Aiiricnlella. 



Genus Frickella. 



Ann. nat. Hist. iv. (1S99), p. 156. 



39—2 



