642 
ZOOLOGICAL LITBRATUKB. 
Rissoa. The British species are, according to Jeffreys’s British Oonchology , 
vol. iv., the following s — 
A. Cancellated. 
1. striatula (Mont.) = carma^a (Da Costa) =/a5m^a (Phil.) j 2. lactea (Mich.) 
fscancellata (Beiidant and Lamarck, as Turbo) j 3. cancellata (Da Costa) 
ssdmex of the older British conchologists = (Mich., Forhes, 
and Hanley) ; 4. calathus (F. & H.), probably only a variety of the fol- 
lowing; 5. reticulata (Mont.) = (Hanley), its immature state is 
textilis (Phil.); 6. cimkoides (Forbes) of Forbes and Hanley^ 
not of Philippi; T.jeffreysii (Waller); 8. punctura (Mont.); 9. ahys- 
sicola (Forbes). 
B. Bibbed lengthwise and spirally striated, outer lip reflected. 
10. zetlandica (IVIont.) == cyclostomata (K6cluz) = clathrata (Phil.) ; 11. 
costata (Adams) (Mich.). 
C. Mostly ribbed lengthwise and spirally striated, outer lip usually strength- 
ened with a rib. 
12. pai'va (Da Costa) =o65cwra (Phil.), YdxiQiy interrupta (Adams) = 
of Forbes and Hanley, not of Lov^n ; 13. inconspicua (Alder), a variety 
=ivariegata (Mohrenstern) ; 14. albella (Lov^n), variety = sarsii (Lo- 
V^n) ; 16. memhranacea (Adams) = ?a6*05a (Mont.) =^rossa eoa^fragilis 
.(Mich.), varieties vmusta (Phil.), data (Scacchi) ; 16. violacea (Desm.) 
ssnjfilabris {Aldev) =lilacina (H6cluz), Yav’ieiy porifera (Lov^u) ; 17. 
oostylata (Alder, not Bisso nor Searles Wood, var. similis, Scacchi); 18. 
striata (Adams) (Mich.), variety arctica (Lov<Sn) and acu- 
leus (Stimps.). 
D. Spirally striated or smooth, outer lip plain. 
19. proxima (Alder) ; 20. vitrea (Mont.) ; 21. pulcherrwia ( Jefir.) ; 22. 
fulgida (^Addxos,)=pygmcea (Mich.) ; 23. soluta (Phil.), a variety 
(Jeffr.); 24. (Mont.) (Phil.) ; 25. cingillus (^lont.) 
=vittata (Donovan), perhaps Linn^’s Kdix pella. 
The so-called genera Ahania, Oaoba^ Setia, Cingula^ Cyclostrema are 
very properly reunited with Rissoa, Brit. Conchol. iv. pp. 1-49. 
Rissoa picta, sp. n., Jefireys, Ann. & Mag. Nat, Hist. June 1867, xix. p. 435, 
Madeira. 
Rissoa acxitilirata, sp. n.. Carpenter, Proc. Calif. Acad. Nat. Sc. 1866, p. 217, 
San Diego, California. 
Rissoa flammea, sp. n.. Pease, Am. Joura. Conch, iii. p. 297, pi. 24. fig. 33, 
Caroline Islands. [Hitherto no true Rissoa has been knovm from the 
tropical parts of the Indian and Polynesian seas ; and also this species, if 
we may judge from the figure, does not appear to be a true Rissoa, but 
rather something like an Odostomia ; the pillar-tooth of the latter genus is in 
some species so faint that it is very easily overlooked. See above, p. 636.] 
Rissoa insignis, sp. n., Folin, M^l^agrinicoles, p. 48, pi. 6. figs. 2-3, on pearl- 
oysters from Panama. H. Crosse, Journ. Conch, xvi. 1868, p. 218, proposes 
for this species a new genus, Folinia. [It somewhat resembles R. exigua, 
Mich,] 
Rissoa frauenfeldi (Schwartz v. Mohrenstern, 1860, as Alvania), Beis. Novar. 
Moll. p. 10, pi. 2. fig. 13, Sydney ; Alvania olivacea (Orb. P ubi P) and A. sale- 
hrosa, sp. n., Sydney, Frauenfeld, Beis. Novar. Moll. p. 11, pi. 2. figs. 14 and 16. 
The author adds that Schwartz v. Mohrenstern considers these three to be the 
