NORTH AMERICAN CONCHOLOGY. 



453 



Tkaxs. 

 Vol. X, 1S53. 



Pa. PI. Fig. 



303 



Obs. 

 V. Pa? 



Name. 



Locality. 



y 59 Liea,. — Description of a new species of Helix from 

 California, and a new characteristic form of cer- 

 tain American Colimacea. 



303 XXX 13 V 59 Helix Lecontii Lea. 



Accessory column in 



Carocolla spinosa Lea, 

 Xidgariana Lea. 



Helix hirsuta Say. 

 mono don Rack, 

 Leai Ward. 

 leporina Gould, 

 Lecontii Lea. 



Polygyra Troostiana Lsa. 

 Dorfeuilliana Lea, 



San Francisco. 



304 













304 









V 



60 



304 









V 



60 



304 









V 



60 



304 









V 



60 



304 









V 



60 



304 









V 



60 



304 









V 



60 



304 









r 



60 



304 









V 



60 



JorR. Acad. 

 Vol. iii, Jan, 



. IS 



Sc. 

 .58. 







289 



311 XXX 26 



314 xxxi 29 



315 xxxii 30 



Vol. iv, Dec. 1Sj8. 

 43 



vi31 

 vi34 

 vi35 



vi43 



40 



V 



1 



vi46 



46 



V 



2 



vi46 



46 



V 



3 



vi46 



46 



V 



4 



vi46 



47 



V 



5 



vi47 



47 



V 



6 



vi47 



47 



V 



7 



vi47 



47 



V 



8 



vi47 



47 



V 



9 



vl47 



47 



V 



10 



vi47 



I^ea* — Descriptions of Exotic Genera and species 

 of the family Unionidae. (From Journal Acad. 

 Nat. Sc. Philadelphia, (n. s.), vol. iii, pt. 4. 

 Jan. 1858.) New Fresh Water and Land Shells. 

 Observations on the genus Unio, vol. vi, pt. 1, 

 1857. 



Unio umbrosns Lea, 

 Coloradoensis Lea. 

 Poeyaniis Lea. 



Medellin riv., Mex. 

 Rio Colorado, Texas. 

 R. de las Balsas, 

 Coyucan, Mexico. 



I^ea. — Descriptions of the Embryonic forms of 

 thirty-eight species of Unionidse, vol. iv, pt. 1. 

 Dec. 1858. (Obs. vol. vi, pt. 2.) 



TJnio obtasus Lea. 



anodontoides Lea. 

 multiplicatua Lea. 

 rutilans J.ea. 

 penicillatus Lea. 

 securis Lea. 

 retusus Lea, 

 Pratii f.cfi. 

 spatulatus Lea, 

 luteolus Lam. 



