160 AMASTRA, OAHU. 



Pease (P. Z. S., 1869, p. 651) and Hartman, 1888, referred 

 extincta to Leptachatina. Dr. Newcomb (in Hartman, 1888) 

 renamed the shell on the ground that having been found re- 

 cent, extincta was a misnomer. Mr. Sykes thinks that the 

 recent shells in question were probably erroneously identified 

 as Pfeiffer's species, an opinion which I share. A. extincta 

 has not been figured. The scarcely convex whorls should be 

 a diagnostic character. Being described as "perforate," it 

 probably belongs to the in flat a series of Amastrae; but on 

 account of its connection in the literature with A. hartmani, 

 we leave it in this group temporarily. 



11. A. HARTMANI 'Newcomb' Hartman. PI. 38, fig. 11. 



Hartman figured as the type of L. hartmani a fossil shell 

 received from Newcomb as from Oahu, which differs from 

 Pfeiffer's description of A. extincta by its very much broader 

 shape and distinct umbilicus. The photograph from which 

 Hartman 's figure was drawn measures, length 12.1, diam. 8.8 

 mm. It is reproduced on our plate 38. No description of 

 this shell has been published, since Hartman considered it 

 specifically identical with A. extincta Pfr. It is therefore 

 defined solely by the figure. 



Oahu, fossil. Type in Hartman coll., Hamburg Mus. 



L[eptachatina] hartmani Newc. (MS. coll. Newcomb), 

 HARTMAN, Proc. A. N. S. Phila., 1888, p. 54. Leptachatina 

 hartmanii Newc., HARTMAN, t. c., p. 56, pi. 1, f. 12 (April 24, 

 1888). 



Hartman based his species hartmani on Pfeiffer's descrip- 

 tion of A. extincta and on a specimen which he expressly 

 designates as the type. It is proposed to restrict the name 

 to the latter. 



Photographs of two recent Oahu specimens referred by 

 Hartman to L. liartmani are in the collection of the Academy. 

 They are much less inflated than the type, and probably not 

 identical with it. 



12. A. ANTIQUA Baldwin. PI. 32, figs. 22, 23. 



"Shell fossil, dextral, narrowly but deeply perforated, the 



