THK NALTlI-l'S. 131 



Fifj. 6. Hjjria rorrugatn L;uii. Speciuien from Rio Tapajos, San- 

 tareiii, Brazil. 



Fig. 7. Tetraplodon undosus (\. Marl.). Specimen from ilio Ti6t6, 

 Itapura, Brazil. 



Plate VII. 



Horizontal cross-sections through the gills of Naiades. All sections 

 from sterile females. In all figures, i inner gill, e outer gill. 

 Photograi)hs taken with li. & L. 1-in. objective. 



Fig. 1. Quadrula puslulosa (hen). Specimen from Lake Erie, Cedar 

 Point, Erie Co., O. 



Fig. 2. Unio gibbosut Barn. 



Fig. 3. Parreysia wynegungaensis (Jjea). 



Fig. 4. Lamellidens consobrinus (Lea). 



Fig. 5. tSpatfia kavirruiiensis Walk. 



Fig. t). Ilyria corrugata Lam. 



Fig. 7. Tetraplodon haseviani nov. 



(Specimens of Figs. ii,3,5,t'), 7 from same localities as on Plate VI: 

 specimen of Fig. 4 from India.) 



NOTES ON SOME PLIOCENE FOSSILS FEOM GEORGIA WITH DESCRIP- 

 TIONS OF NEW SPECIES. 



I'.V T. II. AI.DKIOU. 



Some years since Prof. 8. W. IVIcCallie, State Geologist of 

 Georgia, called my attention to a small block of soft marl in (he 

 State Museum which had a number of shells in it, and at my solicita- 

 tion the same was kindly forwarded to me for examination. I fouml 

 the specimens were a mixture of fresh water and marine, and thai 

 the fresh water ones seemed to be new besides being more or less 

 distorted. The specimens were very fragile; notwithstanding thu 

 greatest care many of the most distorted were badly l)roken. It is 

 hoped that a future examination will reveal more species and an as- 

 sortment of forms far greater than those here described. The hori- 

 zon is probably Pliocene, and seems to represent a southern fauna. 

 The exact locality is four miles south of Atkinson, Wayne Co., Ga., 

 on the Saltiila River. The list of species is as follows : 



1. Raiufta cuveala Gray. (Common, rather small.) 



2. Mnh'nea lateralis Say. 



3. Mulinea congesta Con. 



4. Dnsinia sp ? (Young shells.) 



5. Modiolaria sp ? 



6. Gemma purpurea H. C. Lea. 



7. Neritina sp ? (Too poor for identification.) 



8. Neverita sp ? (Fragments.) 



