PARREYSIA. 157 



form of the binder 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 Cbittagong Hills 

 having the following dimensions : — 



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



Var. nagpoorensis (/^ert); Simpson, AV^ashington, DC, Smiths. 

 Inst., Nat. iMus. rroc. xxii, 1900, p. 842; H. Sc T.. C. I. p. 21, 

 pi. 45, fig. 3. 



Unio nar/poorensis. Lea, I'roc. Acad. Nat. 8ci. I'hiladelpliia, iii, 

 1859, p. ;J:)1 ; .louru. Acad. Nat. Sci. Philadelphia, iv, 1860, 

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

 lig. 150; lilaiiford, J. A. S. P.. xxxv, 1866, p. 143. 



Marr/aron ( Unio) nagpoovensis, Lea, Syn. 1870, p. 38. 



Unio corriifjatiis, MiilL, var. naypoorensis, IE. &T., C. I. 1876, p. 21 ; 

 Pfetel, Conch. Sam. 1800, p. 149. 



Original description : — Testa lajvi, subtriangulari, subinflata, 

 inicquilaterali, postice biangulata, antice rotunda ; valvulis sub- 

 tenuibus, antice crassioribus ; natibus prominentibus, epiderniide 

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

 pressis, obUquis, crenulatis, in utroque valvule duplicibus ; lateral- 

 ibus longis, lamellatis curvisque ; margarita salmonis colore 

 paulisper tincta et iridescente. 



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



Specimens in the Indian Museum Collection are localized as 

 follows : — Poona ; Gudur ; Madras Presidency {G. H. Tipper) ; 

 Godavery River. 



The dimensions of an average specimen are : long. 30, lat. 40, 

 diam. 22*75 mm. 



291. Parreysia (Parreysia) wynegungaensis {Lea). 



Parrei/sia (I'mrci/sia) /ri/iicf/init/dc/isis (Lea); Simpson, Washington, 



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

 Unio u-ipm/iOKjaentiis, Lea, Proc. Acad. Nat. Sci. Philadelplua, 



1859 (1800) p. 331 ; Obs. Genus Unio, vii, p. 89, pi. 45, fig. 151 ; 



Blantbrd, J. A. S. 11 xxxv, 1866, p. 143; Sowerby, Concli. 



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



p. 172. 

 Margaron {Unio) wyneyumjaensis, Lea, Syn. 1870, p. 50. 



Original descriptioti : — Testa loevi, elliptica, inflata, niaequi- 

 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 cardinalibns subcrassis, suberectis, valde 

 crenulatis, in utroque valvule duplicibus ; lateralibus sublongis, 

 crassis subrectisque ; margarita salmonis colore paulisper tincta et 

 iridescente. 



