MOLLUSCA. 
197 
Conch, ii. p. 63. G. Tryon adds that this variety or species has been ob- 
served also in New. Jersey, Maryland, North Carolina, and even, according to 
Dr. Gould, from Georgia to Texas. 
[Group Arionta.'] Only six North- American species are recognized as be- 
longing to this group, and figured by Tryon, Am. Journ. Conch, ii. pp. 316- 
318, pis. 22 & 23, all from Southern California and Northern Mexico, among 
which also Helix humholdtiana, which is placed by most other authors in the 
group Pomatia. 
Group Aglaja. Eighteen species inhabiting the west coast of North Ame- 
rica are distinguished, and most of them figured by Tryon, Am. Journ. Conch, 
ii. pp. 309-316, pi. 22. They are distinguished from Arionta by the more de- 
pressed form, open umbilicus, and malleate surface, Helix arrosaf nicldiniana^ 
and tudieulata being transferred into this group. 
Group Polymita. To this West-Indian group ^ire referred by Tryon, Am. 
Journ. Conch, ii. pp. 318-321, the following six Californian species, figured 
on pi. 23 : — Helix tryonii (Newc.), intercisa (Binn.), areolata (Sow.), redimita 
(Binn.), pandorce (Forb.), and levis (Pfr.). 
Cochlostyla ( Corasia) halichlora and elisahethcey sp. n.. Semper, Journ.' Conch, 
xiv. pp. 261-263, pi. 8. figs. 1, 2, Philippines. — Coch. dattaensis, Semper, ibid, 
p. 162, pi, 6. fig. 1, Philippines. — Bulimus porteiy Pfr. [^Coc1dostyla~\y from the 
Polillo Islands, figured Novitat. Conchol. pi. 74. f. 1-3. 
Bulimus (Amphidromm) formosensis, sp. n., H. Adams, Proc. Zool. Soc* 
1866, p. 317, pi. 33. fig. 6, Tamsui Mountains, Formosa. — B. comes and B, 
dohrm (Pfr.), Cambodja and Cochinchina, fig. Novitat. Conch, pi. 74. figs. 10, 
11, 12, 13, 
Bulimus artensis, sp. n., Gassies, Journ. Conch, xiv. p. 60, New Caledonia. 
Achatina {himicolaria) numidica (Reeve) described and figured from 
Guinean specimens, very variable in the diameter of the shell, Martens, Mai. 
Blatt. xiii. pp. 105, 106, pi. 4. figs. 6-8. — Ach, (X.) Iieuglmi, sp, n.. Martens, 
ibid. p. 94, pi. 4. figs. 1-4, Southern Abyssinia. — Bulimus {lAmicolaria) cliro- 
matcllus and jaspideus, sp. n., Morelet, Journ. Conch, pp. 164, 166, Equatorial 
Africa. 
Achatina hicarinata (Brug.) observed alive on Prince’s Island. The ma- 
jority of specimens were without epidermis, and never so glossy as they are 
found (after artificial preparation) in European collections. Eggs described, 
Dohrn, Mai. Blatt. xiii. pp. 121, 122. 
Achatina bandeirana, welwitschi, tavaresiana, bayoanUj colubrina, paivanuy ze- 
briolata, polychroa, hortensiccy specularisy barbigerUy strigosUy monticolay and 
petrensis, sp. n., Morelet, Journ. Conch, xiv. pp. 156-161, Equatorial Africa. 
Achatina vignoni (Morelet) from Guinea, allied to the subgenera Perideres 
and Pseudachatina, described and figured by Martens, Mai. Blatt. xiii. pp. 107, 
108, pi. 4. fig. 9. 
Achatina histrioy sp. n., Pfeiffer, Mai. Blatt. xiii. p. 86, Haiti. [ Glandina ?] 
Perideres alabaster (Rang) observed alive on trees and shrubs of Prince’s 
Island. The bands belong to the epidermis, and offer many variations. Ani- 
mal ovoviviparou 9 , Dohrn, Mai. Blatt. xiii. p. 123. 
Carelia olivaceuy sp. n.. Pease, Am. Journ. Conch, ii. p. 293, Sandwich 
Islands. 
, Columna Jlmmma (Martyn) observed alive on Prince’s Island, Eggs bean-, 
shaped. Dohrn, 1. c. p. 124. 
