190 TORNATELLINA. 



Strobilus conicus ANTON, Verzeichiiiss, etc., 1839, p. 46, no. 

 1696. 



Said by Pfeiffer to be the young of T. trochiformis if so, 

 the name canica has priority. 



51. T. TROCHIFORMIS 'Beck' Pfeiffer. PI. 53, fig. 14. 



" Shell conic, subtrochiform, striate, a little shining, cor- 

 neous ; whorls 10, flat, the last cariiiate, scarcely one-third the 

 total length ; aperture short, lunate ; columella having a double 

 lamelliform tooth at the base ; peristome simple. Length 4^, 

 diam. 2% mm. Opara, Anton (Pfr., 1842). 



' ' Shell conic, subtrochiform, thin, striatulate, pellucid, 

 glossy, brown-corneous ; spire conic, apex acute ; suture linear, 

 submargined ; whorls 10 to 11, narrow, flat, the last not half 

 the total length, carinate, the base a little convex. Aperture 

 depressed, lunar, having a low lamina on the parietal wall and 

 a horizontal fold winding inwards on the very short colu- 

 mella; peristome acute. Length 5 to 6, diam. 3 to 3^4 mm., 

 oblique length of aperture 2 mm. Island of Juan Fernan- 

 dez " (Pfr., 1848). 



Tomatettina trochiformis BECK, Index Molluscorum, p. 80, 

 no. 2, 1837, nude name. PFR V Symbolae, 1842, ii, p. 55; 

 Monographia, ii, p. 392; iii, p. 525; iv, p. 651; vi, p. 263. 

 KUESTER, Conchylien Cabinet, Pupa, p. 154, pi. 18, figs. 28, 29. 

 -E. A. SMITH, P. Z. S., 1884, p. 280 (Juan Fernandez, Chal- 

 lenger Exped.). Strobilus fissidens Miihlf., Anton, Verzeich- 

 niss, p. 46, no. 1695, undescribed, according to Pfeiffer. 

 Elasmatina cumingiana PETIT, Proc. Zool. Soc. Lond., 1843, 

 p. 2 (July, 1843). 



This species was first defined by Pfeiffer, who gave the 

 locality Opara, on Anton's authority. Subsequently he cor- 

 rected it to Juan Fernandez, and gave a new description. He 

 also, in the Monographia, stated that Strobihis conicus An- 

 ton was the young of trochiformis, doubtless from an exami- 

 nation of Anton's type. E. cumingiana, which Pfeiffer con- 

 sidered a synonym of trochiformis, is thus described. 



"Elasmatina ciimingiana. Shell ovate-conic, pyramidal, 

 pellucid, dilute corneous-brownish; whorls 10-11, subplanu- 



