846 I'JiOCEEDIXdS OF THE NATIONAL MTSEJ'M. VOL.XXII. 



PARREYSIA LEOPOLDVILLENSIS Putzeys. 



Unio leopoldriUenxia PTT/KYS, Proc. Verb. Soo. Mai. Belg., XXVII, 1898, p. xxvn, 

 figs 12, 13.' 



((Iroup of Parreyn-in bakeri.) 



Shell small, inflated, oval, rounded in front, bluntly pointed behind. 

 inflated at or behind the central base; beaks full, high, sculptured with 

 very strong, zigzag bars which extend part way over the disk and end 

 rather suddenly, below which the shell is smooth; posterior ridge well 

 developed, rounded; two compressed pseudocardinals and one lateral 

 in the right valve, two pseudocardinals and two laterals in the left 

 valve. 2 



PARREYSIA BAKERI H. Adams. 



* Unio bakeri H. ADAMS, Pr. Zool. Soc. Lond., 1866, p. 376. * P.CTEL, Conch. Sam., 



Ill, 1890, p. 145.* SMITH, Ann. and Mag., X, 1892, p. 126, pi. xn, fig. 11. ~ vox 

 MARTENS, Besch. Dents. Ost-Af., 1897, p. 231, pi. vn, fig. 6. 



Lake Albert Nyanza, Central Africa. 



PARREYSIA STUHLMANNI von Martens. 



* Unio stuhlmanni vox MARTENS, Besch. Dents. Ost-Af., 1897, p. 231, pi. vn, fig. 13. 

 Albert Edward Lake, Central Africa. 



NODULARIA HAUTTECOEURI Bourguignat. 



*Unio Jiautlecoeuri BOURGUIGNAT, Moll. Ny. Onk., 1883, p. 5, figs. 1-3. * vox 

 MARTENS, Besch. Dents. Ost-Af., 1897, p. 232, pi. i, fig. 23 ; vn, fig. 3. 



NODULARIA HAUTTECOEURI var. EDWARDSIANA Bourguignat. 



* Unio edwardsianus BOURGUIGNAT, Moll. Ny. Onk., 1883, p. 12, figs. 7, 9. 

 Lake Victoria Nyanza, Central Africa. 



PARREYSIA DUPONTI Rochebrune. 



* Reneus duponti ROCHEBRUNE, Bull. Soc. Zool. Fr., XL, 1881, p. 481. 



* Unio duponti ROCHEBRUNE, Bull. Soc. Pliilom., VI, 1882, p. 34. * BOURGUIGNAT, 



Moll.Ny. Ouk., 1883, p. 8, figs. 10-12.* P.ETEL, Conch. Sam., Ill, 1890, p. 151. 



* Unio bakeri VON MARTENS, Sitzber. Ges. Nat. Fr., 1879, p. 104. 



* Unio grandidieri BOURGUIGNAT, Moll. Ny. Ouk., 1883, p. 7, figs. 4-6. * P/ETEL, 



Conch. Sam., Ill, 1890, p. 154. *VON MARTENS, Besch. Dents. Ost-Af., 1874, p. 

 233. 



Lake Victoria Nyanza. 



PARREYSIA RUELLANI Bourguignat. 



* Unio ruellani BOURGUIGNAT, Moll. Ny. Ouk. 1883, p. 10, figs. 16-18.* P.KTEL, 



Conch. Sam., Ill, 1890, p. 166. *VON MARTENS, Besch. Dents. Ost-Af., 1897, p. 

 235. 



Lake Victoria Nyanza. 



1 1 have not seen this species, and I place it here with some doubt. 

 2 1 adopt this group with practically the same limits as given by von Martens in 

 the Beschalte. Unfortunately I have never seen any species belonging to it. 



