242 NILS HJ. ODHNER 
Fernandezia tryoni Pilsbry. — Masatierra, Aug. 1917: El Puente, dead 
in sand, 1 sh., h. 5,8, wh. 6. — Centinela Ridge, about 500 m, in ferns and 
under leaves, I sp., h. 4, wh. 5. 
Fernandezia cylindrella n. sp. Pl. 9, fig. 49. — Shell produced turrite- 
conic, with straight or somewhat concave outline above the middle, convex 
midway and cylindrical or slowly widening in its lower part. Two apical whorls 
faintly convex, smooth, the subsequent ones flattened, last whorl well-rounded, only 
in young shells with an obtuse angle in periphery. Sculpture consisting of fine 
irregular oblique growth-lines, colour grayish horn-brown, here and there with 
indistinct spiral streaks, paler and darker ones. Aperture semi-oval, columella 
straight or slightly convex, truncate (not sinuous) below and carrying a very 
faint spiral fold. Dimensions: H. 5,3, br. 1,6, h. of aperture 1, br. of ap. 0,8 mm. 
Whorls 1113/2. Nepionic shells (text-fig. 18, Z) entirely lacking folds; larger ones 
with only a faint columellar convexity. 
The shell varies rather considerably in the ratio height to breadth, thus 
h. 4,5, br. 1,6; h. 4,3, br. 1,35; when slender,’ their base is always rounded. 
Localities. Masatierra, Aug. 1917: Rabanal, about 300 m above sea, nu- 
merous sps., max. h. 5,3 (fig. 49), and about 400 m, under leaves, many shs., 
max. h. 4,5. — Below Damajuana, thick. forest, about 300 m, some sps., max. 
h. 4,3. — Centinela Ridge, about 500 m, on ferns and under leaves, many shs., 
max. h. 4,5, and 350 m, thick forest, many sps., max. h. 4,2 mm. 
In its polygyrate shape this species is similar to the Hawaiian genus 
Leptachatina, but the structure of its radula is like that of Zornate/lina, and the 
viviparity as well as the shape of the young ones prove that it belongs to 
Fernandezia. No shells with the animals preserved are present, thus, the anatomy 
is unknown. 
General Remarks on Fernandezia. 
Fortunately, I have had at my disposal a sufficient material preserved in 
alcohol of Fernandezia bulimoides, a circumstance which has enabled an examina- 
tion of its organization given below. As a result of this examination, it is 
evident that the fam. Tornatellinidae has differentiated into several directions 
in Juan Fernandez, which seems to speak in favour of the supposition of a long 
isolation of its habitat, and a previous relation or connection of it with a more 
extensive Pacific centrum, from where the original stock of Tornatellina has 
radiated before the isolation of the genus. 
The mantle is furnished with an inferior right lobe, like that of Zornate/- 
lina. Also, the pallial organs are similar, showing a stretched kidney, but this 
is, in the species examined, much shorter, and occupies only half the last whorl. 
No trace of a jaw is present. 
The radula has the same shape as in Tornatellinidae, thus, it is reflected 
circularly in its front end; otherwise, it is achatinelloid in being longitudinally 
folded, and carrying rastroid teeth. The salivary glands are coalesced above 
and below the oesophagus, as in Achatinellidae. The nervous system (fig. 16) 
is more concentrated than that of Pacificella variabilis, though of the same type, 
