RissoiDj;. 105 



var. minor. 

 6 Algiers ; coll. P. Joly, Esq. 



26. Rissoa inconspicua. 



Rissoa inconspicua, Alder, Ann. Mag. Xllly 1844, Northumberland. 

 4 Algiers ; coll. P. Joly, Esq. 



27. Rissoa angulata. 



Rissoa angulata, Eichwald, Nat. SJciz. Lithauen. ISoO ; sect. Moliren' 

 sternia. 



1 Gaya [fossil] ; ex c. Herr Schwartz von Mohrenstern. 



28. Rissoa splendida. 



Rissoa splendida, JEichwald, Nat. Hist. 1, 1S30, p. 219, Black Sea. 

 4 Theodosia, Black Sea ; ex c. C. F. Ancey, Esq. 



29. Rissoa (?) globulus. 



Rissoa globulus, Moller, Lid. 3Ioll. Groenl. 1842. 



1 Greenland j ex " Linna3a." 



Looks to me more like a form of brackish- water Hydrohmice. 



Genus ALVAIS'IA, Bisso. 



Sist. Eur. Mend. IV, 1826, p. 140, type A. cimex, Lin. ^as Alv. europoea, 

 Bisso'], type restr. Gray, P. Z. S. 1847 [as A. calathiscus'] ; sect. ^ Man- 

 zonia, Brusina, Chieregh. Conch. 1870, type Turho zetlandicus, Mtg. 

 [= Turhoella, Leach, ms.. Gray, P. Z. S. 1847^ ; sect. = Plagiostyla, P. 

 Fischer, Fonds de la Mer, et Act. Soc. Lin. Bord. XXIX, 1869, type 

 Bissoa lactea, Mich. 



1. Alvania adelse. 



Rissoa adelse, d'Orbigny. 



2 Steinabrunn [fossil] ; coll. Herr Schwartz von Mohrenstern. 



