3c LIMNAIDA. 
(Limnea.) Sinistral, sub-fusiform, thin, spire elongated, acute ; suture 
deeply impressed ; whorls 6, convex, oblique, rapidly increasing in size, 
the last narrowly oval ; aperture sub-ovate, half the total length, narrow ; 
columella a little twisted and reflected, leaving a narrow, deep umbilicus. 
Light amber colour. IL. 1°05, B. ‘4. (Tyron.) An elongated shell, 
distinguished by its impressed suture and umbilicus. 
P. antipodea, Sowerby ; in Reeves, Conch, Ic. fig. 37 P. variabilis, 
Gray, in part. Shell fusiform, inflated, ferruginous brown, opaque, 
slightly striated ; spire elevated, whorls convex; last whorl ovate, 
swelled in the middle; aperture ovate; columellar fold elevated, a 
little obliquely twisted (Sow) ; L. ‘9, B. ‘5 (from the figure.) 
Lake Wakatipu, Otago. Lake Takapuna, Auckland. 
P. gibbosa, Gould, U.S. Ex. Ep. ; Reeves, Conch, Ic. f. 24. Shell 
shortly sub-cylindrical, pale straw, very smooth; spire short, conical, 
accuminated, last whorl gibbous, or roundly-angular above ; anteriorly 
somewhat attenuated; aperture elongated, outer lip rather straight ; 
columella plait short, tortuous (Sowerby.) L. °55, B. °33. 
P. guyonensis, Woods, Pro. Linn. Soc. of N.S. Wales, iii., p. 
138. f/. 13, f 4. Shell sub-umbilicate, ovate, slightly striate, with the 
lines of growth only, somewhat shining, opaque, corroded above, 
yellowish-horn or olive, more or less sordidly clouded with black ; four 
whorls rapidly decreasing, and very much sloping; last much larger 
than the rest, and broadly flattened in the middle, with two obsolete 
keels in the midst, short, acute; aperture broadly ovate. Peristome 
acute, rounded, lip reflected, columella rather thick. 
Length, -51 ; breadth, 3 ; aperture, length, -36, breadth, -2; length 
of spire, 16 inch. (Woods.) 
Lake Guyon, Nelson. 
According to Mr. Woods, this species is distinguished from the last 
by its colour, and by the double angle on the whorls above and below 
the flattened portion. Specimens from the same locality have been 
determined by Dr. Dohrn as P. hochstetter?, Dunker, of which I have 
seen no description. 
P. nove zealandiez, Sowerby; Reeves, Conch, Ic. f. 29. Shell 
turbinated, solid, chestnut, smooth; spire conical, whorls roundly- 
angular ; last whorl inversely conical, anteriorly somewhat accuminated ; 
aperture rather golden ; inner lip strong ; columella fold a little gibbous 
at the top (Sow.) L. °8, B. °48. 
A distinct species, of which I have seen no specimens.  Distin- 
guished by the breadth of the body whorl posteriorly. 
P. tabulata, Gould, U.S. Ex. Ep. xii., p. 116, f 130; Reeve, 
Conch, Ic., f- 17. Shell inflated, solid, short, greenish-brown ; spire 
obtuse, rather short, whorls rather square, flattened near the suture ; 
last whorl large, roundly angular; aperture wide, pale within, slightly 
acuminated within ; inner lip strong, columellar fold thick, tortuous. 
Remarkable for the flatness of the whorls above the angle (Sowerby.) 
Teco} 6: 
Bay of Islands. (Gould.) 
