OXYGNATHA. 153 
European .species of Helix, pp. 57-GO. Also Helix eonoidali», Adams and 
Rv., may possibly belong to this section. 
h. Shell-lobes tongue-shaped, left cervical lobe divided into two. Shell 
helicoid. X. mimlanacnsis, sp. n., p. 61 (the living animal pi. 1. fig. the 
shell pi. 2. fig. 1), Mindanao, lives on the ground ; a variety, or perhaps di- 
stinct species, p. 62. A", distincta (Pfr.), Cochinchina and Mindanao [is also 
abundant in Siam], citrina (L.), Moluccas. The genital apparatus, jaw, and 
dentition described and figured pi. 3. figs. 13 & 14, pi. 6. figs. 27 & 30, and 
pi. 7. fig. 12. The folloAving species, known from the shell only, probably 
belong also to this section : nohilis, Pfr., and ohliquntn, Reeve, both from 
Zamboanga, Mindanao, horncenfsis, Pfr., schumacheriana, Pfr., donovani, Pfr., 
and soidcyctiana , Pfr., from Borneo. 
c. Shell-lobes rudimentary or wanting, left cervical lobe not divided. 
A", histrialis, Beck, ligulata, Fer., tranqueharica, Fabr., helangeri, Desh., and 
maderaspatana, Gray, all from S. India ; the sexual apparatus, jaw, and den- 
tition of them described and figured pi. 3. figs. 15, 16 & 26, pi. 6. fig. 4, 
pi. 6. figs. 25 k 29, pi. 7. figs. 9-11. Semper, 1. c. pp. 45-66. — The living 
animal of Nanina ligulata (Fdr.) is also described and figured b3^ A. Craven, 
Ann. mal. Belg. vol. iv. 1869, p. 93, pi. 3. According to this figure the 
hinder end of the foot is broad and flat, as the Recorder has observed it in 
N. {Ilhysota) ovum, Val., and different from the elevated truncated extremity 
of N. citrina (L.). 
Ariophanta, Desmoulins. C. Semper characterizes this genus 
in the following manner : — Both shell-lobes of the mantle 
present in most species; a female appendicular gland, composed 
of single lohiili, and connected with a calcareous sagitta ; no 
appendicular glands on the male sexual organ. This genus is 
represented by the following species : — rump hit, v. d. Busch, 
Java; martini, Pfr., Sumatra ; nemorensts,^ivi\\., Celebes; rare- 
guttata, Mouss., Adenare; striata. Gray, Singapore; and atro- 
fusca, Albers, Singapore [and Borneo] . Genital apparatus, 
sagitta, jaw, and dentition of some of the species described and 
figured pi. 3. figs. 17-20, pi. 5. figs. 14 and 24, pi. 6. fig. 31, 
pi. 7. figs. 5-8. No species known from the Philippines. Sem- 
per, 1. c. pp. 50-54. 
Kanina (Arioqyhanta) immerita, sp. n., Blanford, J. A. S. B. xxxix. p. 17? 
South Canara. 
Khysota, Albers ; also elevated to the rank of a genus by 0. Semper. 
Shell-lobes quite absent; left cervical lobe divided into two parts. Sexual 
apparatus simple, without appendicular glands. All known species belong to 
the Philippines, and can be arranged according to the sculpture of the shell. 
a. Shell wrinkled, li. ovum, Val., Luzon ; maxima, Pfr., E. and N. Min- 
danao; porphyria, Pfr., Burias Island; and dvitija, 0. Semper, Luzon. The 
sexual apparatus, jaw, and dentition of these four species described and 
figured pi. 4. figs, i, 6 & 8, pi. 5. fig. 22, pi. 7. figs. 15 & 16. A new species 
belonging to this section, but known only from the shell, is It. antonii, 
sp. n., Semper, 1. c. p. 72, pi. 2. f. 2, Luzon. 
h. Shell decussated. JR. bulla, Pfr., Luzon; semiglobosa, Pfr., Southern 
Luzon, Bohol, Leyte, Samar, Mindanao, and Basilan ; the shell vaiies much, 
1870. [vol. VII.] M 
