426 Errata. 



ERRATA. 



)• - l line from top, for " dorsalis," read " rufidorsalis. " 



r th line from bottom, for "Melopiza," read "M ' 



1' 120, lOthlu ; bottom, for " De la Slave," read "Dela Llave." 



J4, 4th li im top, in- b Core " Eemale," of. 



■ 125, 18th Line from top, for " salolcema," read " cakilasma" 

 131, 15tb line from bottom, for "Seibl." read " LeibL" 



II, 12th line from bottom, for " Gamptosoma," read •• Camptostoma." 

 ■J II. line v ; spaefironites, nail splioeronites. 



580, L 6th line from bottom, for minuscula, Say, read minuscula, Binney. 

 Pag 302, Line 1 from bottom, for "narrow." read "thin." 

 17, line IT from top. for ••II!.. in." read • III., 11." 

 r 108, Hm- in from top, for " distinguished by its nostrils and caudal as 

 before," read " distinguished from the previous species by its nostrils and 

 caudal" 



19, last line hut one, insert before " hermaphroditism" "accidental." 

 .•:;i:;. \: lot arwyUformis, read n< rit<>i<l>s. 



r.rj> :>")<i. strike; oat s/>-< />< 'i-i, which proves to be a land Bhell. 

 r 355 • ' before " Group Physaci 



Group B. Shell with an internal lamina. 

 Genus Gundlackia. Pfr. 1849. 

 Shell ancyliform; apex oblique, aon-spiral, posteriorly inclined, basal side 

 thirds closed by a flal lamina parallel with the plain' of the aperture, soft 

 parte resembling Ancylus. 

 Type Qundtacfiia anoyliformte. Pfr, Cuba. 



Genus Latia. Cray. 1849. 

 Shell crepiduliform, apex spiral, posterior ; aperture with a posterior Bemi 

 lunar septum, Furnished on tin' de with ap og, Blender, free, 



somewhal twi ted lamina. Exterior with a brown spirally stria! rmis. 



Tentacuhe short, triangular ; mantle margin simple; pulmonary aperture on 

 the right side. Pool rounded; teeth unknown. 

 Type Latia neritoidea. Gray. Mew Zealand. 



13d Line from top; Mya armaria, Say; read Mya armaria, Linn. 



