100 RISSOID^. 



Genus FOLlNIA, Crosse, 



J. de C, 1867, type Uissoa insignis, FoUn,from Panama. 



Two species have since been described from Suez in the 

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

 Genus. 



Genus RISSOA, Freminvillef ms. 



Desmarest, Bull. Sci. Soc. Fhilom. 1814, type 2. violacea, Desm.; typejide 

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

 Turho cimex ; sect. = Mohrensternia, Stol., PalcBont. Ind. 1867, type It. 

 angulaia, 'Eichw. ; sect. = Zippora, Leach, Syn. Moll. Gt. Brit. 1852, type 

 B. auriscalpium, Lin. ; sect.= Rissostomia, Sars, Moll. Norveg. 1878, type 

 B. memhranacea, J. Ad. [as Z. drummondi. Leach,'] 



1. Bissoa sulzeriana. 



Alvania sulzeriana, Bisso, Sist. Nat. Mer. 1826. 



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



2. Rissoa lachesis. 



Turbo lachesis, Basterot, Mem. Geol. Bord., 1825. 



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



3. Rissoa albella. 



Rissoa albella, Loven, Index Moll. Scand., 1846, Bohnsldu; var.=B. sarsii 

 Lov., Bergen, fide Jeffreys. 



6 *' Kattegat j " coll. Herr Schwartz von Mohrenstern. 



4. Rissoa decolorata. 



Rissoa decolorata, Phllippi, Mai. Zeits., 1846, Lesina — long. 3, diam. 1\. 

 3 Mediterranean ; coll. Herr Schwartz von Mohrenstern. 



5. Rissoa interrupta. 



Turbo interrupta, tT". ^(?am5, Trans. Lin. Soc. V, 1798 ; fide Jeffreys -^E, 

 parva, var. 



