455 Costa Rica Miocene — OuSvSon 283 



Page 



11. Area dariensis Brown and Pilsbry, Water Cay, about natural 



size...., 184 



12. Area dariensis Brown and Pilsbry, Gatun, about natural size. 



13. Area dariensis Brown and Pilsbry, Gatun, about natural size. 



PLATE 23 (26) 



Fig. I. Area Veatchi, n. sp. , Water Cay, left valve of type, length 



51 mm 189 



2. Area Veatchi, n. sp. .Water Cay, interior of left valve of type. 



3. Area Veatehi, n. sp. , Water Cay, right valve of type. 



4-5. Area golfoyaquensis Maury, variety medioamericana,n. var. , 



Hone Walk Creek, valve of type, 

 length 63 mm 188 



6. Area golfoyaquensis Maury, variety medioamericana, n. var. , 



Hone Walk Creek, left valve of 

 type, same locality. 



7-8. Area aetinophora Dall, Red Cliff Creek, nearly natural size.. 185 



PLATE 24. (27) 



Fig. I. Area eacica, n. sp., type, Comadre Creek, length 36 mm 190 



2. Area Pittieri Dall, Saur}' Creek, natural size 192 



3-4-5. Area Pittieri Dall, Hill la, Banana River, natural size. 



6. Area Pittieri Dall, Hill i, Banana River, natural size. 



7. Area Hindsi, n. sp., type, East Grape Point Creek, natural 



size 193 



8. Area Hindsi, n. sp. , co-tj^pe, Rio Betey, natural size. 



9. Area Hindsi, n. sp., eo-type. Hill ^, Banana River, natural 



size. 

 ID. Area L,loydi, n. sp., co-type, Red Cliff Creek, length 18 mm.. 192 



11. Area I^loydi, n. sp. , type, same locality, diameter 18 mm. 



12. Area Lloydi, n. sp., co-type, same locality, length 15.5 mm. 



13. Area Henekeni Maury, Water Cay, length 30 mm 186 



14. Area Henekeni Maury, Water Cay, length 28 mm. 



PLATE 25 (28) 



Pig. I. Area eostarieensis, n. sp. , type. Hill la, Banana River, nat- 

 ural size 186 



