HERPETOLOGY OF JAPAN. 



List of speciviens of Natrix i^iscator. 



291 



o Type of A. flavipunctatum. b Description p. 



c Sci. Coll. Tokyo No. 16 b. d Figs. 250-252. 



NATRIX ANNULARIS" (Hallowell). 



1856. 



Tropidonotus annularis Hallowell, Proc. Phila. Acad., 1856, p. 151 (type- 

 locality, Ningpo, China; type in Mus. Phila. Acad.; Doctor McCartee, 

 coll.).— SwiNHOE, Ann. Mag. Nat. Hist. (3), XII, 1863, p. 225 (Tamsui, 

 Formosa). — Guenther, Rept. Brit. India, 1864, p. 261 (Ningpo; Chikiang; 

 Formosa); Ann. Mag. Nat. Hist. (6), I, 1888 (p. 171) (Mts. N. of Kiuki- 

 ang). — BouLENGER, Cat. Snakes Brit. Mus., I, 1893, p. 233 (China, 

 Formosa). — Boettger, Ber. Senckenberg. Naturf. Ges., 1894, p. 146 

 (Chinhai, near Ningpo). — Wall, Proc. Zool. Soc. London, 1903, p. 86 

 (Yangtse Valley). 

 1859. Tropidonotus chinensis Berthold, Nachrichten Ges. Wiss. Goettingen, 1859, 

 p. 180 (type-locality, China; tyjje in Goettingen Mus.). 



A nearly related form has recently been described by Doctor Wer- 

 ner as Natrix hahereri ^ from the Ningpo Mountains, near Shanghai. 

 It has practically the same scale formula as N. annularis (viz, 163- 

 164 ventrals and 53-65 pairs of siibcaudals), but the three outer scale 

 rows are said to be smooth and the eye larger ; the keels on the scales 

 are not so strong. Above plumbeous, below red; markings as in 

 N. annularis. Boulenger regards them as identical. "^ 



Description. — Adult male; U.S.N.M. No. 34044; northern Formosa, 

 May 25, 1903; A. Owston, collector (figs. 253-255). Rostral much 

 wider than high, just visible from above; internasals narrow, espe- 



o Signifying with small rings, referring to ventral black half-rings. 



b Tropidonotus habercri Werner, Abh. Bayer. Akad. Wiss. (Muenchen), II Klasse, 

 XXII, Pt. 2, 1904, p. 354, pi. i, figs. 1-2 (type-locality Ningpo Mts., near Shanghai; 

 types in Mus. Munich; Doctor Haberer, collector). 



cZool. Rec, 1903, Rept. p. 24. 



