EXPLANATION OF PLATES. 335 



PLATE 39. 



31, 32. Drymseus trigonostoma v. correctus Pfr. Binnenmoll. 



Venez., ......... 258 



33, 35-40. Drymseus trigonostoraus v. correctus Pfr. Spec- 



imens, ........ 258 



34. Drymseus trigonostoraus Jonas. Phil. Abbild., . . 256 

 41-43. Drymseus curianianus Rve.=trigonostomus. Conch. 



Icon., 256, 257 



44, 45. Drymseus trigouostomus Jonas. Specimens, , . 256 



46, 47. Drymseus glaucostoma Alb. Specimens, . . . 256 



48,49. Drymseus eversusMss.=violaceus. Novit. Conch., 207, 208 



PLATE 40. 



1. Drymseus chimborasensis Rve. Conch. Icon., . . . 261 



2, 3. Drymseus decoratus Lea. Type specimen, . . . 261 



4. Drymseus decoratus v. goniobasis Pils. Specimen, . . 262 



5. Drymseus fabrefactus Rve. Conch. Icon., .... 260 



6. 7. Drymseus chanchamayensis Hid. Novit. Conch., . . 259 



8. Drymseus canaliculatus Pfr. Conch. Icon., . . . 263 



9. Drymseus cantatus Rve. Conch. Icon., .... 205 

 10,11. Drymseus murrinus Rve. Conch. Icon., . . . 214 

 12,13. Drymseus elegantissimus Mouss. Novit. Conch., . 211 



14. Drymseus spectatus Rve. Conch. Icon.. .... 213 



15. Drymseus spectatus ( leai). Conch. Icon., . . . 213 

 16,17. Drymseus gracilis Lea leai Pils. Type specimen, . 213 



18. Drymseus fresnoensis Pils. Type specimen, . . . 304 



PLATE 41. 



19, 20. Drymseus napo Angas. P. Z. S., . . . . 244 



21. Dryrmeus (?) fidauisis Mor. Rev. et Mag. Zool., . . 232 



22, 23. Drymseus quadrifasciatus Angas. P. Z. S., . . . 243 

 24, 25. Drymseus eurystomus Phil. Novit. Conch., . .221 

 26. Drymseus pealianus Lea. Obs. Gen. Unio, . . .217 

 27,28. Drymseus pealianus Pfr. Conch. Cab., . . .218 

 29, 30. Drymseus subinterruptus Pfr., var. Couch. Cab., . 245 



31. Drymseus arcuatostriatus Pfr. Conch. Icon., . . . 230 



32, 33. Drymseus hamadryas Phil. Novit. Conch., . . 226 

 34, 35. Drymseus interrnptus Pfr. Conch. Cab., . . . 244 



36. Drymseus electrum Rve. Conch. Icon., .... 310 



37, 38. Drymseus henseli Mart. Novit. Conch., . . . 254 



PLATE 42. 



39, 40. Drymseus strigatus Sowb. Conch. Illustr., . . . 228 



41. Drymseus strigatus v. purus Pils. Conch. Illustr., . . 229 



42, 43. Drymieus musivus Pfr. (strigatus). Specimens, . 229 



