846 FBOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



PARREYSIA LEOPOLDVILLENSIS Putzeys. 



Unio leopoJdriUensis Potzeys, Proc. Verb. Soc. Ma]. Belg., XXVII, 1898,p. xxvii, 

 figs 12, 13.1 



(Group of Farreysia hakeri.) 



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.^ 



PARREYSIA BAKERI H. Adams. 



* Unio hakeH H. Adams, Pr. Zool. Soc. Load., 1866, p. 376.— *P.etel, Conoli. Sam., 



Ill, 1890, p. 145.— ''Smith, Ann. and Mag., X, 1892, p. 126, pi. xii, fig. 11.— * von 

 Martens, Besch. Dents. Ost-Af., 1897, p. 231, pi. vii, fig. 6. 



Lake Albert Nyanza, Central Africa. 



PARREYSIA STUHLMANNI von Martens. 



* Unio stuldmanni voN Martens, Besch. Dents. Ost-Af., 1897, p. 231, pi. vii, fig. 13. 

 Albert Edward Lake, Central Africa. 



NODULARIA HAUTTECOEURI Bourguignat. 



*Unio hautiecoeuri Bourguignat, Moll. Ny. Onk., 1883, p. 5, figs. 1-3.— * vojr 

 Martens, Besch. Deuts. Ost-Af., 1897, p. 232, pi. i, fig. 23 ; vii, fig. 3. 



NODULARIA HAUTTECOEURI var. EDWARDSIANA Bourguignat. 



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

 Lake Victoria Nyanza, Central Africa. 



PARREYSIA DUPONTI Rochebrune. 



* Beneus duponii Rochebrune, Bull. Soc. Zool. Fr., XL, 1881, p. 481. 



* Unio diqjonti RocHEBRUXE, Bnll. Soc. Philom., VI, 1882, p. 34.—* Bourguignat, 



Moll. Ny. Onk., 1883, p. 8, figs. 10-12.—* F.etel, Coach. Sam., Ill, 1890, p. 151. 



* U7iio hakeri von Martens, Sitzber. Ges. Nat. Fr., 1879, p. 104. 



* Unio grandidieri Bourguignat, Moll. Ny. Onk., 1883, p. 7, figa. 4-6. — * PvETEl, 



Conch. Sam., Ill, 1890, p. 154.— *voN Martens, Besch. Deuts. Ost-Af., 1874, p. 

 233. 



Lake Victoria Nyanza. 



PARREYSIA RUELLANI Bourguignat. 



*Unioruellani Bourguignat, Moll. Ny. Onk. 1883, p. 10, figs. 16-18.— * P.etel, 

 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 aay species beloagiag to it. 



