THE TERTIARY DEPOSITS OF BRAZIL. 85 
GASTROPODA. 
PsrupoLacuna*, Bottger, 1878, Jahrbuch kaiserlich-kéniglichen 
geologischen Reichsanstalt, Wien, 1878. 
PsEUDOLACUNA MACROPrERA, Bottg. loc. cif. (Pl. VIL. fig. 12.) 
Shell small, smooth, composed of six whorls; spire conical; the 
body-whorl greatly enlarged; left or columellar lip thick, reflected, 
possessing a single central tooth on the sigmoidal columella, and a 
smaller callosity on the upper portion ; aperture elongated, somewhat 
trigonal and expanded, and acute or angular centrally, pointed at 
both extremities, emarginate at the base, or the anterior canal 
slightly recurved ; outer or right lip thick. 
This shell resembles in outline the genus Alycewus of Gray, but 
the columellar tooth, elongated aperture, thickened peristome, and 
reflected callosity on the columella remove it from that genus. 
Loc. Canama. 
Natica 2 
Three specimens which appear to belong to this genus are amongst 
the shells collected. They are thick and heavy for so small a species, 
and appear to me to be somewhat abnormal forms of Natica. 
Shell thick, smooth, glazed, and dense; whorls five, ventricose ; 
sutures deep; body-whorl large; aperture elongated; left or colu- 
mellar lip thick; near posterior canal much thickened; right lip 
slightly waved; umbilicus (?) small. 
Loc. Canama. 
Neririna punera, Ether. (PI. VII. fig. 9.) 
Shell small, semiglobose, thick; outer lip of peristome much ex- 
panded ; surface of shell covered by dark, nearly equal-sized, spots, 
which appear to be epidermal or cuticular (they disappear with the 
removal or destruction of the outer shelly covering) ; columella ver- 
tical, with six or seven obscure teeth along its edge; the pigment- 
dots are arranged in lines springing from the apex, as in Neritina 
ziczac, and follow the lines of shell-growth. Although the mark- 
ings may have no specific value, I nevertheless refer to them asa 
means of recognizing the shell in the same deposits. 
Loc. Canama (in yellow clay). 
Neritra ziczac, Ether. (Pl. VII. figs. 10, 10a.) 
Shell semiglobose, broader than high; aperture lunate; outer lip 
expanded, thin, or acute; columella broad, flat, and straight, having 
* I had proposed the name Alyceodonta for this shell, naming the species 
after Mr. B. Brown. I find, however, that Dr. Oskar Bottger, of Frankfort, 
has already described it, giving it the above name (Psewdolacuna macroptera). 
There can be no doubt it is Dr. Bottger’s genus, We both apparently gave a 
new generic name to this shell; but priority must be given to Dr. Bottger, on 
account of date of publication, as, since my notice of the shell, the description 
by Dr. Béttger has appeared, which necessitates my withdrawal of the name 
Alycgodonta. 
