138 THE NADTII-CS, 



As Sowerby's and Wood's names both refer to the typical form 

 of bicarinatus Say, as defined in Mr. Walker's excellent paper 

 (Nautilus, xxiii p. 1. & p. 21, 1909), the name major Beck becomes 

 synonymous with that form. 



The form described by Mr. Walker on p. 5, of the Nautilus xxiii 

 1909 should be written eorrugatus ' Curr.' Wkr. 



Pleurodonte acutangdla Burrow. 



Burrow's name for the shell generally known as Pleurodonte 

 angulata Fer. from Porto Rico, should be used. Part of the syno- 

 nomy is given below. Pfr. (Monogr. I, p. 197, 1908) thought 

 Burrow's shell was HeUcoslyla papyracea Brod., a mistake which was 

 perpetuated in Manual of Conchology, ix, p. 219. 



Helix acutangula Rev. E. I. Burrow, Elements of Conchology, 

 London, 1815, pp. 183 and 248. Beck. Index Moll. 1837, p. 45, 

 No. 6, Pilsbry, Manual Conch, ix, 1894, pp. 99 and 219. 



Helix angulata Burrow, Elem. of Conch. 1815, pi. 26, f. i.; Fer., 

 Hist. Nat. Moll. I, pi. 61, f. 2, (published after 1821 and before 

 1825). Gray, Ann. Philos. London, n. s. ix, p. 412, 1825. Pfr., 

 Monogr. I, p. 297, 1848. Desh. in Fer,, Hist. Nat. Moll. I, p. 343, 

 1850. 



For the rest of the synonomy see Fer., Hist. Nat. Moll. I, p. 343 

 and Pilsbry, Man. Conch, ix, 1894, p. 99. 



Helix angulata Fer., Tabl. Syst. Anim. Moll., Prodrome Gen., 

 1821, p. 36, is a nude name. 



NOTES ON SOME PLIOCENE FOSSILS FBOU OEOBGIA WITH DESCRIP- 

 TIONS OF NEW SPECIES. 



BT T. H. ALDRICH. 



{Concluded from page 132.') 



10. POTAMIDES CANCEL]. OIDES n. Sp. Pl. 8, figS. 2, 2a. 



Shell small, whorls about seven or eight, first two smooth, the 

 next three convex and cancellated, the transverse lines strongly 

 raised, generally two in number and nodulous at the intersections. 



Body whorl in both specimens carrying four or more transverse 

 lines. Aperture ovate-elongate; canal short twisted. 



Length of No. 2a, 3^ mm. Fully grown example is at least 15 

 mm. 



