100 RISSOIDiE. 



Genus FOLINIA, Crosse. 



J. de C, 1S67, type Rissoa inslgnis, Folin,from Fanama, 



Two species have since been described from Suez in tlie 

 " Fonds de la Mer," but not figured ! I have never seen tbe 

 Genus. 



Genus RISSOA, Freminville, ms. 



Desmarest, Bull. Sci. Soc. Philom. 1814, fi/pe B. violacea, Desm. ; type fide 

 Gray, P. Z. S. 1847, R. lahiosa \_=me7nbranacea] ; type fide Herrm. 1848, 

 Turbo cimex ; secl. = Mohrensternia, Sfol., Palmont. Ind. 1867, type R. 

 angulata, Eichw. ; sect. = Zippora, Leach, Syn. Moll. Gt. Brit. 1832, type 

 £. auriscalpium, Lin. ; sect, = Rissostomla, Sars, Moll. Norveg. 1878, type 

 R. membranaeea, J, Ad. [as Z. drummondi, Leach.'\ 



1. Eissoa sulzeriana. 



Alvaiiia sulzeriana, Risso, LList. Nat. Mer. 1826. 



3 Piedmont [fossil] ; coll. Herr Schwartz von Molirenstern. 



2. Bissoa lachesis. 



Turbo lachesis, Basterot, 3Iem. Geol. Bord., 1825. 



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



3. Rissoa albella. 



Rissoa albella, Loven, Lidex Moll. Scand., 1846, Bohnslati; var. = R. sarsii 

 Lov., Bergen, fide Jeffreys. 



6 " Kattegat ; " coll. Herr Schwartz von Mohrenstern. 



4. Rissoa decolorata. 



Rissoa decolorata, Phllippi, 3Ial. Zeils., 1846, Lesina — long. 3, diam. ij. 

 3 Mediterranean ; coll. Herr Schwartz von Mohrenstern. 



5. Rissoa interrupta. 



Turbo interrupta, t7. ^c/aws, Trans. Lin. Soc. F, 1798 ; fide Jeff'reys-=R, 

 parva, var. 



