236 NILS HJ. ODHNER 
whorls; the variation of shape thus being considerable. — Centinela Ridge, 
about 500 m, on ferns and under leaves, a few sps., max. h. 6,3, and about 
350 m, thick forest, a few sps., max. h. 5,5. — The Yunque quebrada, lower 
part, 6 shs., max. h. 7,2, wh. 8. — Puerto Ingles, about 400 m, thick forest, many 
sps., max. h. 6,4, and about 200 m, among leaves, some small sps. — Rabanal, 
about 400 m, under leaves, a few sps., max. h. 5,5, about 300 m, many sps., 
max. h. 6,5, and in the quebrada, under leaves, many sps., max. h. 6.— Below 
Damajuana, about 300 m, under leaves, some sps., max. h. 6,8, and in thick 
forest, many sps., max. h. 8. — The Portezuelo quebrada, to 200 m, on ferns 
and under leaves, many sps., max. h. 4,8. 
Variations: 7. dz/amellata varies in proportions, as shown by the measure- 
ments given; normally it is rather wide, sometimes, however, strikingly slender. 
In the latter case also, the dentition of the aperture is subject to increase, 
inasmuch as there are three palatal folds or teeth, sometimes united by a 
vertical callus existing occasionally also in the typical form. In the last-named 
variety the columellar fold is flanked with a distinct tooth below and an obsolete 
one above. This variety is shown on plate 9, fig. 36. That these forms are 
merely varieties of the same species is proved by the fact that there exist 
transition specimens and, further, that the young specimens, still contained in 
the uterus of the mother, show differences in shape and dentition even within 
the same mother (cf. fig. 18 a—d). In young specimens of the three-toothed 
variety the teeth appear in their strong performation sooner than in young ones 
of forma typica. This variety also differs from the latter in its smoother and 
more glossy surface, as well as in its reddish-brown colour, whereas the type 
is more coarsely striated by growth lines and has a horn-green hue. All forms 
very often have an encircling light band on the middle of the last whorl, often 
accompanied or substituted by a dark-brown one. The young individuals of 
forma typica are distinctly angled in the basal periphery, though not to the same 
degree as in 7. conzca. 
The three-toothed variety is present from the following localities: Centinela 
Ridge, about 650 m, under ferns, 5 sps., max. h. 5,4, whorls 7, and 500m, on 
ferns and under leaves, 4 sps., h. 4,7. — Salsipuedes Ridge, about 350m, many 
sps., max. h. 4,5. — Puerto Ingles, about 400 m, some sps., max. h. 6. — Puerto 
Frances, about 400 m, I sp., h. 5. — Piedra Agujeriada Valley, many small sps. 
— Below Damajuana, about 300 m, I sh., h. 4,5. 
Tornatellina conica Anton. Pl. 9, fig. 37. — Masatierra, Aug. 1917: 
Centinela Ridge, about 500 m above sea, under ferns, numerous sps., max. h. 5,2, 
and about 350 m, thick forest, some sps., max. h. 5. — Puerto Ingles, about 
400 m, thick forest, some sps., max. h. 6,4, wh. 11, and 200 m, among leaves, 
2 small sps. — Piedra Agujeriada Valley, some small shs. — Rabanal, 
down in the quebrada, under leaves, many sps., max. h. 5,6, wh. 10, and about 
300 m, many sps., max. h. 4,5, br. 3, another sp. h. 4,7, br. 2,6, thus varying 
in proportions; about 400 m, under leaves, 4 small sps. — Below Damajuana, 
thick forest, under leaves, about 300 m, 4 shs., max. h. 5,2. — The Porte- 
zuelo quebrada, to 200 m, among leaves and on ferns, some shs., max. h. 
4,8. — Salsipuedes Ridge, about 350 m, on ferns and under leaves, 3 sps., max. 
