SPIRAXIS.—TORNAXIS. oll 
12. Spiraxis linearis. 
Spirazis linearis, Pfr. Malak. Blatt. xiii. p- 84 (1866) *; Monogr. Helic. Vivent. vi. p. 193°; 
Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 616 (t. 25. figg. 7, 7a, 5?) °. 
Volutaxis linearis, Strebel, Beitr. Mex. Land- und Siissw.-Conch. v. p- 124, t. 12. fig. 10*. 
Hab. E. Mexico: Vera Cruz, on the beach, under pieces of wocd cast ashore (Strebel 
and Berendt \~4), 
The figure given by Fischer and Crosse is remarkably different from that given 
by Strebel, which was probably drawn from a not full-grown specimen. 
13. Spiraxis blandi. | 
Spiraxis blandi, Crosse & Fisch. Journ. de Conch. xxv. p- 271 (1877)*; Fisch. & Crosse, Miss. 
Scient. Mex., Mollusca, i. p. 616, t. 25. figg. 11, lla, 5’. 
Hab. E. Mexico: State of Vera Cruz (coll. Crosse) 12. 
14. Spiraxis scalella, sp.n. (Tab. XVIII. fig. 5.) 
Testa conoideo-turrita, costulis rectis confertis compressis sculpta, flavescenti-albida, diaphana; anfr. 5, 
regulariter crescentes, infra suturam perconvexi, ultimus basi concaviuscule attenuatus ; apertura ovata, 
subtus angustata, mergine columellari modice torto, tenui. 
Long. 23, diam. 3; apert. long. 2, diam. 4 millim. 
Hab. S.W. Costa Rica: El Pital, at an elevation of 250 metres above the sea, in the 
valley of the Rio Naranjo (Pittier). 
In the very convex whorls this species resembles S. scalartopsis, and it might also be 
compared with a Scalaria, but the costes are much more numerous and more feeble. 
As I have seen only one specimen, and the number of the whorls is rather few for this 
~ genus, it may perhaps be not full-grown, but I know no other species to which it could 
be referred. 
TORNAXIS, gen. nov. 
Shell turrite, imperforate, vertically costulated, not shining, many-whorled, not 
keeled ; aperture ovate, external margin simple, arcuate ; columellar margin very thick, 
strongly twisted, separated by a deep and narrow notch from the basal margin. 
Anatomy not yet known. 
This genus possesses to a certain extent the characters of both Subulina and Spiraais 
as regards the form of the aperture, but in its general aspect it approaches nearer to 
Rhodea, H. & A. Adams, from which it only differs in the absence of the prominent 
spiral keel in the terminal whorls. _ 
Named from axis, and tornare, to turn on a lathe; analogous to Spiraxis. 
1. Tornaxis singularis, sp.n. (Tab. XVIII. fig. 6.) 
Shell cylindrically turrite, rather solid, with vertical narrow coste, separated by interstices which are from two 
to four times as broad as the coste, of dull greyish colour. Whorls very convex, with simple linear 
sutures, six in number in the only specimen obtained, which is broken above (there are, no doubt, 
considerably more in perfect examples); last whorl rounded in the periphery, somewhat concavely 
attenuated and produced at the base. Aperture distinctly oblique, asymmetrically ovate, acute above, 
