— 303 — 



OBiscrvatioiis on tbe genus Uiaîo, logelher witli 

 descriptions of new species in Ihe family Unio- 

 nîiSîe, and descriptions of new species of ihe nfc- 



laniiEse , Ijinaiacidae , faladissîe and Ilcli- 



eitise, etc. By (Observations sur le genre Unio, 

 avec la description d'espèces nouvelles de la fa- 

 mille des Unionidœ et de celles des Melanidœ , 

 des Limneidœ, des Paludinidee et des Helicidœ. 

 Par) ïsaac i.ca. — Vol. XI (I). 



On licia ïieydii = Cypricardia Leydii. — Descrip- 

 tions of 14 new species of Meianiiise. — Descrip- 

 tions of 11 new species ofexotic Unionitiie. — 

 Descriptions of 24 new species of Unionicise. — 

 Descriptions of anew species of Unio and a Mo- 

 nocoïKiyEea. — Descriptions of a new genus of 

 tlie family Mcianidse. — Descriptions of 11 new 

 species of Meianîtia;. — Descriptions ofand re- 

 marks on Piaiiorbis ]%>wiierryi. — Descrip- 

 tions of 6 new species of Uoioaiidae from Lake 

 Nyassa. — Descriptions of 6 new species of Ssac- 

 ciuca, etc. — Descriptions of 13 new species of 

 Meiaaiiiise. — Descriptions of a new species of 

 PiaiBorbis. — Descriptions of 5 new species 

 of liyiBiaica. — Descriptions of 2 new species of 

 Unionuise, from Soulh Africa. — • Descriptions of 

 24 new species of piiysa. — Descriptions of 

 6 new species of W. Asiatic iiuioniaise — Descrip- 



(1) Philadelphie, 1866. Un volume grcand iii-i" de 1-16 pages 

 d'impression, accompagné de 2i planches lithographiées. 



