PABBEYSIA. 157 



form of the hinder edge of the shell contrasts strongly with the 

 inflated form of the central portion. Anterior and posterior 

 cicatrices confluent, apical ones under the cardinal tooth." 



The variety sometimes attains a considerable size, a specimen 

 in the Indian Museum collection from the Chittagong Hills 

 having the following dimensions : 



Long. 43-25, lat. 70, diam. 27 mm. 



Var. nagpoorensis (Lea) ; Simpson, Washington, DC., Smiths. 

 Inst., Nat. Mus. Proc. xxii, 1900, p. 842 ; H. & T., C. I. p. 21, 

 pi. 45, fig. 3. 



Unia nagpoorensis, Lea, Proc. Acad. Nat. Sci. Philadelphia, iii, 

 1859, p. 331; Journ. Acad. Nat. Sci. Philadelphia, iv, 1860, 

 p. 270, pi. 45, fig. 150; Obs. Genus Unio, vii, 1860, p. 88, pi. 45, 

 tig. 150; Blanford, J. A. S. B. xxxv, 1866, p. 143. 



Margaron ( Unio} naypoorensis, Lea, Syn. 1870, p. 38. 



Unio corrugatus, Mull., var. naypoorensis, H. &T., C. I. 1876, p. 21 ; 

 Psetel, Conch. Sam. 1890, p. 149. 



Original description : Testa Ia3vi, subtriangulari, subinflata, 

 inaBquilaterali, postice biangulata, antice rotunda ; valvulis sub- 

 tenuibus, antice crassioribus ; natibus prominentibus, epidermide 

 rufo-fusca, striata eradiata, dentibus cardinalibus parvis, com- 

 pressis, obliquis, crenulatis, in utroque valvulo duplicibus ; lateral- 

 ibus longis, lamellatis curvisque ; niargarita salmonis colore 

 paulisper tincta et iridescente. 



Hob. Ambajari Tank, Nagpoor, Bengal (C. M. Wheatley). 



Specimens in the Indian Museum Collection are localized as 

 follows : Poona ; Grudur ; Madras Presidency (G. H. Tipper) ; 

 Grodavery River. 



The dimensions of an average specimen are : long. 30, lat. 46, 

 diam. 22*75 mm. 



291. Parreysia (Parreysia) wynegungaensis (Lea). 



Parreysia (Parreysia) wynegungaensis (Lea) : Simpson,Washington, 



D.C., Smiths. Inst., Nat. Mus. Proc. xxii,' 1900, p. 842. 

 Unio wynegungaensis, Lea, Proc. Acad. Nat. Sci. Philadelphia, 



1859 (1860) p. 331 ; Obs. Genus Unio, vii, p. 89, pi. 45, fig. 151 ; 



Blanford, J. A. S. B. xxxv, 1866, p. 143 ; Sowerby, Conch. 



Icon, xvi, 1868, pi. 67, p. 339 ; Psetel, Conch. Sam. iii, 1890, 



p. 172. 

 Margaron (Unio) wynegungaensis, Lea, Syn. 1870, p. 50. 



Original description : Testa Ia3vi, elliptica, inflata, maaqui- 

 laterali, postice sub-biangulata, antice oblique rotundata ; valvulis 

 subcrassis, antice crassioribus ; natibus prominentibus, ad apices 

 valde divaricate undulatis ; epidermide luteo-oliva, micante, obso- 

 lete radiata ; dentibus cardinalibus subcrassis, suberectis. valde 

 crenulatis, in utroque valvulo duplicibus ; lateralibus sublongis, 

 crassis subrectisque ; margarita salmonis colore paulisper tincta et 

 iridescente. 



