LEPTINARIA.—TORNATELLINA. 323 
supra n i : i : os - os . . “oye “ys 
sup on dilatatus ; paries aperturalis callo tenuissimo et in ejus medio plica spirali gracili profunde 
intrante circumvolutus. 
Long. 7, diam. 43-5; apert. long. 4, lat. 22 millim. 
Last whorl, seen from the dorsal side, to the whole length of the shell as 1:13. 
Hab. Centra Costa Rica: Santa Clara, at an elevation of 200 metres above the sea 
(Biolley, 1896). 
S.W. Costa Rica: Golfo Dulce (Pittier, 1896) ; Turubares, 500 metres above the 
sea, on the Pacific slope (Biolley). 
Beyond the spiral plate, the whole columellar margin is transversely rounded towards 
the interior, like a cornet or paper-bag, for which I use the term “convolutus.” The 
parietal plate is very low, and only to be seen by looking into the aperture from above 
(fig. 20 a). 
22. Leptinaria emmelinz. (Tab. XVIII. fig. 21.) | 
Leptinaria emmeline, Tristr. P. Z. 8.1861, p. 2811; Fisch. & Crosse, Miss. Scient. Mex., Mollusca, 
i. p. 625°. 
Tornatellina emmeline, Pfr. Monogr. Helic. Vivent. vi. p. 262°. 
Hab. N. Guatemata: Coban (Salvin 1°). 
The specimens which Mr. Salvin has sent me under this name are much smaller than 
the measurements given by Canon Tristram, and want the parietal tooth or plate 
mentioned by him; they are, probably, young individuals, and the typical 
one seems to have been lost. That which agrees best with the description 
is only 5 millim. long (instead of 15), its diameter 3 (instead of 5), the 
aperture 2 long and 14 in diameter; whorls barely 5 (instead of 7-8). The 
shell is distinctly perforate (this not being the case in L. elise), a character 
not mentioned by Canon Tristram; the columellar margin is much more feeble, and 
the spiral winding fold is separated by a light depression from the proper columellar 
margin. Although I am not quite sure that these specimens belong to the same 
species, I give, nevertheless, a figure of one of them. 
TORNATELLINA. 
Tornatellina, Beck, Index Moll. p. 80 (1837). 
Shell oval or oblong, solid, with yellowish-coloured glossy periostracum ; suture 
ordinarily linear, not deep ; aperture oval or oblong, with a very thick, white, distinctly 
twisted, strongly notched columellar margin, and in most species also with a strong 
compressed plate on the upper wall of the aperture, entering far within. 
This genus possesses most of the characters of Leptinaria, but differs from it in the 
solid, coloured shell. It is almost confined to the islands of the Pacific, from the 
Carolines to Juan Fernandez, only one species, the following, being said to belong to 
Central America. 
41* 
