1869. | CLASSIFICATION OF 'THE HELICTERIN#. 645 
character), no species is common to any two of the islands, and but 
few analogous ; most of the genera are not only confined to one 
island, but to a certain district on that island. The localities re- 
corded are in many cases incorrect, especially of those species fur- 
nished to the late H. Cuming by Dr. Frick. 
Ten subgenera of Helicterine have been proposed by authors, all 
of which, with slight modifications, I retain as genera, adding three. 
388 species have been described, 166 of which I class as synonyms 
or varieties ; 222 consequently remain distinct. The following Table 
furnishes the area of each island in square miles, and the number of 
species and genera described from each * :— 
| | : 
Kauai. |- Oahu. Motokai Maui. Lanai. Hawaii, | 
| 
| 
——— 
Area.. .| 630 610 | 220 650 | 150 3800 
Species} 21 | 128 | 24 31 | 12 6 
| Genera . 2 9 Tes | 8 6 3 
1 introduce only such synonyms as have not been recorded here- 
tofore. They are explained below. 
Family Hevicip. 
Subfamily HELicrerin”. 
Testa imperforata vel subperforata ; sinistrorsa vel dextrorsa ; co- 
lumella plica torta munita, rarius Bulimi- vel Achatiniformi; /a- 
bro intus plus minusve incrassato, rarius tenui; s@pe magis mi- 
nusve expanso, 
Animal ovoviviparum, 
Genus 1. Hexicrer (Fér.).° 
T. crassa, solida, polita, globoso-conica; apice acuto; plica colu- 
mellari valida ; labro incrassato. 
Helicter aptycha (Pfr.). Helicter multilineata (Newe.). 
bicolor (Gul.). ovum (Pfr.). 
cestus (Newc.). pulchella (Pfr.). 
— decora (Feér.). perversa (Swains.) = 
lugubris (Chem.). “ cinerosa’’ (Pfr.). 
—~—- lorata (Fér.). swiftt (Newc.). 
mustelina (Migh.). turgida (Newe.). 
morbida (Pfr. ). vittata (Kve.). 
I retain the generic name given by Férussac to the whole subfamily 
* The small islands of Kahului, 40 square miles, and Niihau, 10 square miles, 
have not been examined. - They have a scanty growth of low bushes over a por- 
tion of their surface, where one or two species of Leptachatina may possibly be 
found. [For a recent Map of the Sandwich Islands, see Journ. R. Geograph, 
Soc. 1868, p. 361.—P. L. 8.] 
