RISSOID.E, 



var. minor. 



6 Algiers j coll. P. Joly, Esq. 



26. Rissoa inconspicua. 



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

 4 Algiers ; coll. P. Joly, Esq. 



27. Rissoa angulata. 



Rissoa angulata, Eichwald, Nat. STciz. LitTiauen. 1830; sect. Mohren- 

 sternia. 



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



28. Rissoa splendida. 



Rissoa splendida, Mchwald, Nat. Hist. 1, 1830, p. 219, Slack Sea. 

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



29. Bissoa (?) globulus. 



Rissoa globulus, Holler, Ind. Moll. Groenl. 1842. 



1 Greenland j ex " Linnsea." 

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



Genus ALVA1STA, Eisso. 



Hist. Eur. Merid. IV, 1826, p. 140, type A. cimex, Lin. [as Alv. europcea, 

 Jtisso'], type restr. G-ray, P. Z. S. 1847 [as A. calathiscus] ; sect. = Man- 

 zonia, Srusina, Chieregh. Conch. 1870, type Turbo zetlandicus, Mfg. 

 [= Turboella, Leach, ms., Gray, P. Z. S."1847~\ ; sect. = Plagiostyla, P. 

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

 Missoa lactea, Mich. 



1. Alvania adelse. 



Rissoa adelse, d'Orbigny. 



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



