SYSTEMATIC LIST OF SPECIES. 
xv 
alabastmm, Pf. t. 144, f. 5. 
altivagus, Bn. t. 34, f. 2, 3, 6. 
annnlatns, Tros. t. 143, f. 1, 4. 
artbriticns, Th. t. 1, f. 4. 
aurantiacus, Sebum, t. 33, f. 4. 
Aurora, Bn. t. 3, f. 4. 
Bairdi, Pf. t. 4, f. 1. 
balteatus, Bn. t. 3, f. 1. 
Bensoni, Pf. t. 34, f. 5. 
cadiscus, Bn. t. 105, f. 10; t. 3, f. 8, 
as Thwaitesii. 
calyx, Bn. t. 4, f. 4. 
Ceylanicus, 1 Pf. t. 33, f. 2. 
casloconus, 2 Bn. t. 4, f. 5. 
cornu-venatorium, Bn.t. 104, f. 5, 6. 
cratera, Bn. t. 47, f. 8. 
cryptompbalos, Bn. t. 3, f. 7. 
cytopoma, 3 Bn. t. 47, f. 9. 
deplanatus, Pf. t. 3, f. 10. 
expansus, Pf. t. 2, f. 3, 4. 
exul, Bn. t. 47, f. 10. 
eximius, Mous. t. 33, f. 1. 
flavilabris, Bn. t. 1, f. 1. 
foliaceus, 4 Chem. t. 2, f. 5, 6. 
fulguratus, Phil. t. 144, f. 1; t. 3, 
f. 3 ; t. 3, f. 2 ? 
Haughtoni, 5 Th. t. 1, f. 3 ; t. 3, f. 6; 
t. 48, f. 6. 
Himalayanus, Pf. t. 34, f. 4. 
hispidulus, Bl. t. 47, f. 5, 6. 
Indicus, Desb. t. 48, f. 3. 
Inglisianus, Sfcol. t. 143, f. 8, 9. 
involvulus, Mull. t. 2, f. 1. 
Jerdoni, Bn. t. 33, f. 5, 6. 
Layardi, Ad. t. 104, f. 2, 3. 
loxostoma, 6 Pf. 
Malayanus, Bn. t. 48, f. 4. 
Menkeanus, Phil. t. 33, f. 3. 
Nilagiricus, 7 Bn. t. 1, f. 5. 
opkis, Hanl. t. 144, f. 0. 
parapsis, 8 Bn. (Ceylon), 
parma, Bn. t. 143, f. 2, 3. 
patens, 9 * Bl. t. 3, f. 5. 
Pearsoni, Bn. t. 48, f. 5 (not t. 1, 
f. 5 *°). 
pernobilis, Gould, t. 1, f. 7. 
Phayrei, Th. t. 144, f. 3, 4. 
phsenotopicus, Bn. t. 4, f. 3. 
pinnulifer, Bn. t. 4, f. 2. 
polynema, 11 Pf. t. 2, f. 8. 
porphyriticus, Bn. t. 105, f. 4. 
pyrotrema, 12 Bn. t. 2, f. 9, 10. 
ravidus, Bn. t. 105, f. 5, 6. 
scurra, Bn. t. 105, f. 2, 3. 
serratizona, Thorpe, t. 144, f. 7. 
Shiplayi, Pf. t. 143, f. 7, 10. 
Siamensis, Sow. t. 48, f. 7. 
speciosus, Ph. t. 104, f. 4, 7. 
stenomphalos, Pf. t. 34, f. 1. 
stenostoma., Sow. t. 105, f. 7, 8; 
var? f. 9. 
sublsevigafcus, Bl. t. 34, f. 7. 
subplicatulus, Bedd. t. 145, f. 5, 7. 
Theobaldianus, Bn. t. 1, f. 2 ; var. 
t. 144, f. 2. 
Thwaitesii, Pf. t. 3, f. 9 (not 8). 
tristis, Bl. t. 143, f. 5, 6. 
tryblium, Bn. t. 48, f. 1; var. t. 47, 
f. 10. 
zebrinus, Bn. t. 2, f. 2. 
Otopoma. 
Hinduorum, Bl. t. 6, f. 5, 6. 
Helicina. 
Andamanica, 13 Bn. t. 6, f. 10. 
Arakanensis, Bl. t. 6, f. 9. 
scrupulum, Bn. t. 133, f. 8, 9. 
Neritina . 14 
coluber, Thorp, t. 157, f. 10. 
FRESHWATER SHELLS. 
fuliginosa, Th. t. 157, f. 8, 9. ; Perotetiana, Reel. t. 157, f. 2, 3. 
obtusa, Bn. t. 157, f. 7, 10. | reticularis, Sow. t. 157, f. 5, 6. 
1 The reference to Sowerby by Pfeiffer, -who at first (in 
Kuster’s Chemnitz) attributed the species to Sowerby, was f. 320, 
321; the latter was omitted by our printer ; the former is, how¬ 
ever, the less like our ideal. 
2 The fine white basal groove which indents the inner lip is 
a useful distinguishing characteristic. 
3 Having washed the type, the band alluded to by Benson 
proved to be mere dirt, and in place of paler flames near the apex 
there were red wavy lines on a paler ground. 
4 The C. Leai of Tryon (Amer. J. C. vol. 5, p. 111. pi. 10, f. 
6), who doubts its identity with the Chemnitzian species. 
5 Reeve, who did not know this shell, quotes it as a synonym 
of excellens {said to come from Birmah), the single type of which 
is much nearer his labiosus. 
6 Proc. Zool. Soc. 1852, p. 146: Kust. Chemn. Cycl. pi. 49, 
f. 12, 13, as Cyclost.; Mon. Pneum. vol. 1, p. 93. Ceylon. 
Reeve’s figure (C. Icon. Cyclop, f, 83) looks very different from 
Kuster’s, yet both were from Cuming’s types. 
7 Found also in the jungle of Coorg. 
8 An. Nat. 1853, ser. 2, vol. 12, p. 96.—Pf. Moa. Pneum. 
Tol. 2, p. 66. Reeve's figure is not our ideal. 
8 This species is figured in Pfeiffer's “ Novitates,” pi. 98, 
f. 3. 4. 
10 This appears either a form of Theobaldianus (?), or possibly 
an unrecognised species. 
11 Cyclostoma, f. 115, of Sowerby’s Thesaurus (vol. 1) seems 
identical. 
12 In Benson’s manuscript I note that he regards this species 
as identical with the torquatus of Hutton (J. Asi. Beng. vol. 
3, p. 82) from Rajmahal. 
13 According to Sowerby, this is the Merguiensis of Pfeiffer 
(Pr. Z. 1857, p. Ill, and Mon. Pneum. vol. 2, p. 216); if so, 
that name would have priority, but he is wrong. 
14 To limit our work, we have excluded the estuary species 
(of course the marine), and, perhaps, a few fluviatile ones, at 
least such as are found far off from the sea. The omitted shells 
are N. Peguensis, Bl. (? = Bengalensis, Potiez); N. rostrata. 
Reeve; N. crepidularia, Lam.; N. violacea, Gmel. (depressa. 
Bn.): N. cornucopia, Bn. (melanostoma, Tros. and Indica Soul.); 
with which estuary shells may be compared N. pileolus, Reel. 
N. intermedia, Desh., and N. mitrula, Beck (in Gal. Douai); N. 
Layardi, Reeve; N. Colombaria, Reel.; N. triserialis, Sow.; N. 
Smithii, Gray (tigrina, Benson, hamuligera, Tros.); and N. 
Cpromandejiana of the Conchological Illustrations. 
