lOO 



BuivIvETIN 9 



292 



Explanation of Plate 13. 

 (19) 



Fig. I. Meretrix nuttalliopsis var. gf'Cggi n. var. 

 .8 natural size 



2. Meretrix nuttalliopsis var. gi'^ggi n. var, 



.8 natural size 



3. Corbicida f cornelliana n. sp 



4. Coralliophaga priyna n . sp 



4a. Interior of the same. 



5. C. prima (edentulous) 



6. Sphcerella 



7 . Diplodonta 



8. Psammobia ozarkana n. sp 



9. Solen 



ID. Madra prretenuis var. bistriata n. sp 



1 1 . Corbula concha Aid 



12. C. aldrichi Meyer, left valve, with radii 



13. C. aldrichi Meyer, showing right valve, ex- 



terior. 



13a. C. aldrichi Meyer, showing right valve, in- 

 terior 



14. Corbjila alabamiensis var 



14a. The same, exterior. 



15. Pholas alatoidea 



15a. Inside, showing spoon-shape process. 



16. Glycymeris alabama n. sp. .8 nat. size 



Engraved by the Electro Light Engrav- 

 ing Company, New York. 



Page. 

 62, 254 



65, 257 

 60, 353 



65. 257 



< ( (I 



66, 358 



67, 259 



68, 360 



69, 361 



