266 PROCEEDINGS OF THE ACADEMY OF [1898. 



Our further observations upou the family may be grouped under 

 five heads : — 

 I. Names applied to generic and minor groups of Cylindrelloid 



snails. 

 II. Key to the genera and subgenera. 



III. Classified lists of the species with zoo-geographic and other 

 notes. 



IV. Brief sketch of other genera of the family. 



V. Provisional phylogenetic diagram and table of geographic dis- 

 tribution. 



I. CHRONOLOGICAL LIST OF NAMES APPLIED TO CYLINDRELLOID 



SNAILS. 

 (Exclusive of those pertaining to Lia, Macroceramus, Holospira, and other 

 generally recognized genera). 



1822 (or earlier). Cochlodina Ferussac, Tableau Systematique, 

 etc., p. 24, 61. 



Under Helix, Ferussac establishes a " Quatorzieme sous-genre. 

 Cochlodine, Cochlodina nobis." The subgeneric definition applies 

 better to Clausilia than to the other forms included by Ferussac in the 

 group ; and, indeed, seems to be based wholly upon that genus. 



The species of Cochlodina are classified as follows : — 



* Shell dextral. 



f Aperture without teeth or lamina?. 



1. Peristome not continuous. 

 Premier groupe. Les Pupoides, Pupoides. 



493 carinata Gmel. \=Macroceramus lineahis Brug.]. 



494 nebulosa nobis, [nomen nudum]. 



495 ignijera nobis, [nomen nuduni]. 



2. Peristome continuous. 

 Deuxieme groupe. Les Tracheloides, Tracheloides. 



496 sloanii nobis, [nomen nuduni]. 



497 draparnaldi nobis, [nomen nudum]. 



498 petiveriana nobis. [probably=C. eximia Pfr.]. 



499 blainvilliana nobis, [nomen nudum]. 



500 cylindrus Chemn. \_=Cylindrella]. 



501 rosata nobis, [nomen nudum], 



502 truncata Dillw. [Undeterminable I^Megalomastoma]. 



503 fasciata Lam. [Undeterminable 7=Megalomastoma]. 



