148 
MOLLUSCA. 
radula, though there are more teeth in each row, and the labial 
palpi are less developed. The species of this genus are thoroughly 
separable from Spiraocis, which is a heterogeneous assemblage. 
The Central- American and Mexican species are arranged as follows : — 
Sect. 1. spp. striatae ; *rdcoleti (Sliuttl.), hotterianu (Or. & Fisch.). Sect. 2. 
spp. subla3vigatie : Chersomitra (Martens): pfeifferi (new name for Pfeiffer’s 
Achatina streptostyla) y *hlandiana, and *binneyana (0. & F.), cylindracea 
(Pfr.), meridana (Morelet), hiconica and *delattrii (Pfr.), * edioardsiana and 
*sallai (0. & F.), irriyua, limncBiformisy and Jlavescens (Shuttl.), *cingidata 
(0. & F.), * shuttleioorthi and houcardi (Pfr.), coniformis (Shuttl.), delihuta and 
^abida (Morelet), *boyeriana and *bocourti (C. & F.), *lurida (Shuttl.), *ful- 
vida, * glandiformisy and * cornea (0. & F.), cobanensis (Tristram), *sololensis 
(0. & F.)ypbysodes (Shuttl.), auriculaceay hidlacea, oblonga, parvida, *turgidxday 
and *nigrieans (Pfr.), *mitr(Bformis (Shuttl.), and catenata (Pfr.). All de- 
scribed, 1. 0 . pp. 14-64 'y those marked * figured, pi. 1. figs. 2-16, and pi. 3. 
figs. 1-6 ; the living animal of S. nigricans, pi. 1. fig. 15 b. 
Ennea bicolor (type of the section Huttonella) . Its anatomy 
exactly corresponds with that of Streptaxis. Stoliczka, J. A. 
S. B. xl. p. 170, pi. 8. fig. 7, living animal. 
Ennea cylindrelloideay id. ibid. p. 171, pi. 7. fig. 4, Moulmein; batalhana, 
Pfeiffer, Mai. Bl. xviii. p. 71, pi. 1. figs. 17 & 18, Batalha, W. Africa: 
spp. nn. 
Streptaxis. The anatomy of S. obtusus, sp. n., and burmanicus 
(Blf.) is given by Stoliczka, 1. c. pp. 161-163, pi. 8. No jaw ; 
radula resembling that of Testacella ; generative organs of 
simple form, vas deferens without any appendages j a few large 
eggs. 
Streptaxis solidulus, obtustis, and hanleyatius, spp. nn., id. 1. c. pp. 166-168, 
pi. 7. figs. 10-16, Moulmein j the differences of burmanicus (Blf.) and blan- 
fordianus (Theobald) are discussed, ibid. pp. 163 & 164, pi. 7. figs. 6-9 j san- 
keyanus (Bens.), ibid. p. 167, fig. 14. S. pellucens (Blfd.), Cambodja, and 
exacutus (Gould), Mergui : Pfeiffer, Nov. Conch, iv. pp. 29 & 30, pi. 115. 
figs. 11-J4, 
E alula gradatci (Mouss.) agrees with the Testacellidce in the 
radulff and ip wanting a jaw. Perhaps the whole section Cha- 
ropa and some Endodontm are to be transferred to this family. 
Semper, Nffchp. malak. Ges. iii. pp. 124 & 125. 
OxYGNATHA (ZoNITIDiE) . 
Heynbmann, Nadir, malak. Ges. iii. p. 92 et seq., refers to the American 
spp. of Umax. 
Leydig (JH. Ver. Wiirtt. 1871, pp. 210-228, 271) gives some useful notes 
concerning the specific distinctions and occurrence of various European 
dugs. 
