HELIX. 159 
aperture a trace of a second, corresponding to nos. 1 and 2 (see Martini & Chemnitz, 
loc. cit. fig. 6). 
There is a curious resemblance between these shells (nos. 27, 28, 29) and some from 
the Moluccas, viz. H. costaricensis to H. scheepmakeri, Pft., H. quillarmodi to H. bicon- 
vera, v. Mart., and H. adela to H. aurita, v. Mart. (see Die Preuss. Exped. nach Ost- 
Asien, ii, Landschnecken, pp. 316-318, t. 16. figg. 12, 13); but I suppose this may 
be rather an analogy than a true affinity, and only the knowledge of the anatomy (jaw, 
radula, and genital organs) can decide the point. 
Subgen. SoLARopsis, Beck. 
Solaropsis, Beck, Ind. Moll. p. 164 (1838) ; Albers, Die Helic. ed. 1, p. 127, ed. 2, p. 164. 
Shell depressed, beneath more convex than above, finely granulated, variegated with 
reddish-brown, umbilicated or perforated; aperture nearer to the perpendicular than 
ordinarily in Helix, narrow lunate; peristome mostly reflexed, not very thick. Jaw 
nearly smooth. 
This is a very characteristic subgenus of South America, where it is spread from 
Colombia to the southernmost provinces of Brazil; it has only one certain represen- 
tative in Central America. 
CoMPARATIVE TABLE OF THE SPECIES OF THE SUBGENUS SOLAROPSIS. 
Nomen. Forma. Umbilicus. | Sculptura. | Coloratio. ere Diam. Alt. Anfr, Patria. 
mm. mm. 
tiloriensis, Angas] inflato - de- | angustus, piloso-granu-) fulva, fasciis | tenuis, sub- 9 5 43 S.E. Costa Rica. 
pressa, spi- | semiobtec- lata. et maculis| reflexus. 
ra concavi- | tus, rufis. 
uscula. 
sigmoides, More/.| inflato - de- ” ” pallide fla- | tenuis,rectus.| 13-19 7-9 34-4 | N. Guatemala. 
pressa, spi- vescens, 
ra concava. concolor. 
30. Helix tiloriensis. 
Helix (Solaropsis) tiloriensis, Angas, P. Z. 8. 1879, p. 477, t. 40. fig. 2°. 
Hab. 8.E. Costa Rica: hills between the rivers Tilorio and Zhorquin (Gad '). 
