238 NILS HJ. ODHNER 



general. No cases were found in which these advanced neanic no more than 

 normal neanic ones, were fertile; the strong lamellae seem to prevent the 

 breeding of young ones. In the complete absence of lamellae, except the colu- 

 mellar one, the ephebic stage resembles the gerontic, in opposition to the fol- 

 lowing species. 



Localities: Masatierra, Aug. 1917: Round Portezuelo, 570 m above sea, on 

 ferns, some sps., max. h. 4 (neanic), and 5,1 (gerontic st.). — The Portezuelo 

 quebrada, about 300 m, on ferns, many sps. (all stages, figs. 38 — 40, with varying 

 dentition of aperture), max. h. 3,7. — Centinela Ridge, about 500 m, under 

 ferns, numerous neanic shs. (figs. 41, 42), max. h. 2,85, and 5 small gerontic, 

 max. h. 4, and 350 m, 3 small neanic shs. — Rabanal, about 300 m, 3 neanic 

 and I small gerontic sh.; in the quebrada, under leaves, i neanic and i ephebic 

 (h. 4) sh. — Puerto Ingles, about 400 m, thick forest, i neanic sp., h. 2,4. — 

 Below Damajuana, thick forest, i neanic sp., h. 2,4. — Piedra Agujeriada Valley, 

 I neanic sp., h. 2,4. 



Tornatellina callosa n. sp. PI. 9, figs. 43, 44. — Shell turriform, with 

 slightly convex whorls, shining and smooth, except irregular fine growth costellae 

 and faint traces of spiral striae; last whorl well rounded. Aperture about a 

 third of the shell height, narrowly semilunate; columella short, with a thick 

 projecting, entering lamella, above and beneath it callous; the sinus beneath the 

 columella filled with a callus and furnished with a small tooth. Aperture in the 

 neanic and the ephebic (fig. 43) stages with a very strong parietal lamella 

 bent upwards with its edge, as well as a strong palatal lamella opposite to the 

 columellar fold. Colour horn-brown, suture margined with a red-brown line. 

 Dimensions of gerontic stage: h. 3,6, h. of ap. 1,3; br. 1,7, br. of ap. 0,9 mm. 

 Whorls 6^'2. 



Localities: Masatierra, Aug. 1917: Centinela Ridge, about 500 m above sea, 

 on ferns and under leaves, 4 gerontic (fig. 44) and some neanic and i ephebic 

 (fig. 43) sps., max. h. 3,6; 350 m, thick forest, 3 gerontic shs., max. h. 3,5. — 

 Rabanal, about 300 m, 3 gerontic shs., max. h. 3,8, and about 400 m, under 

 leaves, i gerontic sh., h. 3,5. 



Remarks: In this species the young shell seems to be equipped with 

 lamellae even up to the ephebic stage: in one specimen (fig. 43) examined for 

 young ones one small nepionic shell was found having a small columellar and 

 a parietal tooth, but only some faint traces of palatal ribs (fig. 18,/). The 

 scantity of material makes it impossible to state whether this stage is a true 

 ephebic or a transition from the neanic stage. 



Tornatellina aperta n. sp. PI. 9, figs. 45, 46. — Shell small, with slightly 

 convex whorls, the last one flattened above and below the middle, with a blunt 

 angle in the periphery; spire turrited, aperture shorter than half the shell, 

 rather wide and almost rhomboidal, columella with a short slightly prominent 

 fold in the middle, deeply sinuous in its lower part. Colour grayish horn-brown 

 with stripes of light yellowish gray. Sculpture: only oblique and irregular lines 

 of growth, here and there acquiring the shape of fine costae. Dimensions: height 3, 

 h. of aperture 1,4, br. 1,8 mm; whorls 5. 



