130 
Philippine Journal of Science 
1920 
and Nias, Natuna Islands, Banka, Malay Peninsula, Burma, 
Siam, Annam, and northern India. 
Genus HEOSEMYS Stejneger 
Geoemyda Gray, Proc. Zool. Soc. London (1834) 100, part; Cat. Tort. 
(1844) 14; Cat. Shield Kept. (1855) 16; Gunther, Kept. Brit. 
India (1864) 18; Gray, Suppl. Cat. Shield Rept. 1 (1870) 25; An- 
derson, Zool. Res. Yunnan (1879) 716; Boulenger, Cat. Chel. Rhyn. 
Croc. Brit. Mus. (1889) 135; Fauna India, Rept. (1890) 23; 
Strauch, Mem. Acad. Sci. St.-Petersburg 38 (1890) 15; SiEBENROCK, 
Sitzb. Akad. Wiss. Wien 112 (1903) 340; Mocquard, Rev. Colon. 
(1907) 11; DE RooiJ, Rept. Indo-Aust. Arch. 1 (1915) 298. 
Emys Dumeril and Bibron, Erp. Gen. 2 (1834) 232, part. 
Clemmys Strauch, Chel. Stud. (1862) 28, part. 
Heosemys Stejneger, Proc. Biol. Soc. Washington 15 (1902) 238; 
SiEBENROCK, Zool. Jahrb. Suppl. 10 (1909) 506. 
Neural plates mostly hexagonal, short-sided behind; plastron 
extensively united to carapace by suture ; entoplastron intersected 
by humeropectoral suture; skull lacking a bony temporal arch; 
anterior part of hea'd covered with undivided smooth skin, pos- 
terior occipital and temporal regions with skin divided into scale- 
like elements; triturating surface of upper jaw rather narrow, 
without a median ridge; digits fully or partly webbed; five 
clawed digits on forefoot, four on hind foot; tail very short. 
The generic name Heosemys was made by Stejneger to include 
the three species long known under the generic name Geoemyda. 
The latter name, as shown by Stejneger, must stand for the 
species associated under the name Nicoria Gray. 
There are three well-known species belonging to the genus 
Heosemys; namely, H. spinosa Gray, widely distributed from 
Burma to the Malay Peninsula and Archipelago; H. grandis 
Gray, found in Burma, the Malay Peninsula, and French Indo- 
China; and H. depressa Anderson, known from Arrakan. A 
fourth species, from Leyte, Philippine Islands, is here described. 
Key to the species of Heosemys Stejneger. 
o'. Anterior margin of carapace serrated. 
6’. Plastron strongly narrowed in front, with a strong notch between 
gular and humeral shields; plastron uniform yellow or reddish 
brown H. leytensis sp. nov. 
Plastron moderately narrowed in front, with no notch or only a slight 
one between gular and humeral shields ; plastral shields with radiat- 
ing lines H. spinosa Gray. 
a’. Anterior margin of carapace not serrated. 
b\ Carapace arched or tectiform in a transverse section. 
H. grandis Gray. 
Carapace depressed, flat on vertebral region. 
H. depressa Anderson. 
