Suter. — On New Zealand Molhisca. 249 



whorl. Currents very likely brought this specimen to this con- 

 siderable depth. 



(14.) Lake Waikaremoana (Stat. 34 — Dredging in 10 ft. to 

 20 ft.). — There are thirty-four adult shells, cinereous to black 

 according to the amount of coating covering the shell. Most of 

 them have six rounded smooth whorls, a few only are shouldered, 

 none have spines. Peritreme brown. The dimensions vary from 

 5 x 2| mm. to 6i x 3| mm. These also are typical examples. 



(15.) Lake Manapouri (Stat. 15 — From shallow water near 

 the shore). — Two large adult specimens, both of which are of 

 horn-colour, broadly shouldered, with distant brown spines on 

 the carina, two or three arising from a common broad base. 

 The larger example shows distinctly the slightly chordate carina 

 below the row of spines on the last whorl, a character mentioned 

 by P. Fischer. The other species, however, shows no trace of it ; 

 and it is, as I have pointed out elsewhere, not a constant but an 

 extremely rare feature of salleana. The dimensions of the two 

 shells are — 8 x 5 mm. and 7x4 mm. 



I have similar specimens from Lake Kanieri, kindly collected 

 for me by Dr. Macandrew, of Hokitika, but they are more ventri- 

 cose, and I assign them to P. corolla. 



Potamopyrgus badia, Gould (1848). 



Amniccla badia, Gould, Proc. Bost. Soc. Nat. Hist., vol. iii., 



1848, p. 75. ' 



(1.) Lake Wakatipu (Stat. 10 — Dredged with weeds in 200 ft. 

 to 300 ft.). — Seven shells of very light horn-colour, rather variable 

 in size and shape. Only one, the largest, has spines ; the others 

 have the whorls convex, a few showing indications of a keel. 

 They are very thin and fragile, the peritreme continuous in all, 

 and light-brown. The largest shell measures 7x3^ mm., and 

 it is very similar to the large specimens found in Lake Te Anau. 

 The smallest shell, with six whorls, is 5 x 2| mm. 



(2.) Lake Wakatipu (Stat. 18 — Dredged with weeds in 20 ft. 

 to 100 ft.). — Ten shells, three of which are not adult, very variable 

 in size, of light-horn colour, and very thin. Four have smooth, 

 rounded whorls, two are slightly shouldered, and four are spinous. 

 On the lower whorls the setse are far apart, sometimes two to 

 four bristles arising from a common base. All have six whorls, 

 and the dimensions range from 5| x 2 J mm., 6x 3| mm., to 

 6| x 3J mm. 



(3.) Lake Wakatipu (Stat. 6 — From weeds fringing shore). — 

 Seven shells of horn-colour, covered with a thin white coating, 

 six convex whorls, suture impressed. Some examples are 

 slightly shouldered on the upper whorls, with minute close-set 

 short bristles. All are of about the same size — 44; x 2J mm. 



