RISSOIMJ. 55 



Sub-Genus TRYONIA, Stinipson. 

 Smithsonian Misc. Coll. VII, 1865, type T. elathrata, Stimpson. 



50. Hydrobia (Tryonia) protea. 



Amnicola protea, Gould, Proc. Boston Soc. V, 1855, Colorado Desert. 

 18 Desert, E. of California; coll. Prof. E. C. Stearns. 



Sub-Genus PSEUD AMNICOLA, Paulucci. 



Mater. Malac. Hal. 1878, type Paludina similis, Drop, [for Amnicola, 

 Authors, not of Gould and Hald.~\. 



61. Hydrobia (Pseudamnicola) similis. 



Cyclostoma simile, Draparnaud, Hist. Moll. Fr. 1805 [sine JSTaJ.] ; Jids 

 Jeffreys, Hydr, anatina, Auct. [not of Poiret or Drap.~\. 



2 Boufarick [Algiers] ; coll. P. Joly, Esq. 



3 England ; ex c. G. Nevill, Esq. 



52. Hydrobia (Pseudamnicola) dupotetiana. 



Paludina Dupotetiana, Forbes, Ann. Mag. 1838, Bougie. 



30 Maison Carree [Algiers] ; coll. P. Joly, Esq. 

 7 Biskra; coll. P. Joly, Esq. [3J, 2$]. 

 6 Boghar; coll. P. Joly, Esq. [as " Hy. lutea"]. 



53. Hydrobia (Pseudamnicola) subproducta. 



Hydrobia subproducta, Paladilke, Rev. Mag. Zool. 1866, Catalonia and 

 Pyrenees OrientaleSj " errata," p. 40, for Hy. spirata, Paladilhe, I. c. [not 

 of Requien]. 



10 Cartagena [Spain] ; coll. G. Nevill, Esq. 



54. Hydrobia (Pseudamnicola) macrostoma. 



Paludina macrostoma, Kilster, Conch.- Cab. II, 1853, Athens. 

 2 Chalcis [Greece] ; ex " Linnaea." 



55. Hydrobia (Pseudamnicola) seminula. 



Amnicola seminula, Charpentier ms., von Frauenfeld, Ver. zool.-lot. 

 Ges. Wien, 1863, p. 1027, Arcadia long. 1'5, diam. 1'3 mil. 



8 Euboaa; ex " Linnaea" and P. Bouvier, Esq. 



56. Hydrobia (Pseudamnicola) negropontina. 



Amnicola negropontina, Clessin, Maldk. Slat. XXV, 1878, Eub&a. 

 4 Euboaa ; ex " Linneea. " 



