168 unionid.t:. 



beaks very deep and angular Tlie green Dojora variety is 



remarkable for the great development of the teeth. The lateral 

 ones are disposed to be treble in the right as weW as in the left 

 valve ; and several parallel plica? intervene between them and 

 the exaggerated cardinal teeth in a perfect specimen with the 

 following: dimensions: Long. 37, lat. 50. diam. 23 mm." 



299. Parreysia (Parreysia) vulcana {Hanley). 



Pnrrei/sia (Parreysia) viib'ana (Ilanlev) : Simpson, Wa.shington, 

 D.C., Smiths. Inst., Nat. Miis. Proc. xxii. 1900. p. 844. 



Unio vulcanu^, llauley, P. Z. S. 1875. p. 606: H. k T.. C. I. 1876, 

 p. 62, pi. 155, %. 3; P^etel, Conch. Sam. iii, 1890, p. 172. 



Orif/inal description: — Testa solida, inaequilateralis, subovata, 

 viridis, undique (nisi fortasse ad extremitatem anticam) phcato- 

 rugosa ; plica? (sen tubercula elongata couflnentia) undatim angu- 

 lariter et oblique ordinate. Margo dorsalis posticus et margo 

 ventralis convexi, subparalleli. Costa nmbonalis nulla ; area 

 postica nequaquam concava. Lunula lata, hand multum impressa. 

 Margarita alba, vix minime iridescens. Margo cai'dinalis latus ;^ 

 denies cardinales solidi, lacerati : in valvula sinistx-a dens lateralis 

 inter duos valvuke dextr» insertus. 



Long. 25, lat. 38 mm. 



Hah. Burma. 



Described from an isolated specimen and appearing to somewhat 

 resemble P. tavoyensis (Gld.), in form. 



To the description the following note is appended : — 



" . . . . When lield before a light the valves appear of a yellowish 

 green, richly embossed with zigzag ridges of a darker or bluer ver- 

 dure. The hinge is nearly the same as in U. [P. (P.)] favidens of 

 Benson, the central teeth being short and complicated." 



300. Parreysia (Parreysia) feae {Tapparone-Canefri). 



Parreysia (Parrcjisia) fea- (Tapparoiie-Canefri) ; Simpson, Wash- 

 ington, 1).C., Smiths. Inst.. Nat. Mus. I'roc. xxii, 1900, p. 844. 



Unio fea; Tapparone-Canefri, Ann. Miis. Civ. St. Nat. Genova, 

 xxvii, 1889, p. 340. 



Original description : — Testa solida, crassiuscula, subcordato- 

 ovata, insequilaterali, postice attenuata, margine ventrali sub- 

 arcuato postice sinuato, umbonibus tumidiusculis, decorticatis. 

 Valv3B rugis concentricis profundis 3-4-5 saepius exarata?, epi- 

 dermide luteo olivaL-ea, tenui, kevi indutae, umbonibus prfesertim 

 et latere postieo in junioribus varie ex laite-viridi depictis et 

 fulgurato-corrugatis. Dentes cardinales crassi, subtrigoni,laeiniati 

 et striati, dentibus in valva dextera unico, in sinistra duplici, 

 postieo majori triaugulari, antico-oblongo minori. Margarita kete 

 caruea. 



Long. 42-4o, lat. 55, diam. 25-29 mm. 



Hab. Meetan, Houugdaran Eiver (L. Feu). 



