72 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.66 



It must be admitted that Boulenger's dictum that N. percarituita is 

 closely allied to xV. annularis is correct, but the characters, as indi- 

 cated above, seem to justify its retention as a distinct form. 



NATRIX PISCATOR (Schneider) 



To the synonymy in Herpetology of Japan, 1907, p. 288, add : 



Troijidonotus piscator Stanley, Journ. N. China Asiat. Soc, vol. 45, 1914, 

 p. 28 (Chekiang and Fukien) ; vol. 46. 1915, p. xiii (Swatow, Kv^'angtung). 



No less than ten specimens from Fukien, viz., Nos. 64643, from 

 Kuliang collected b}'^ C. R. Kellogg, Xos. 65381-4, from the Futsing 

 district, Nos. 65404-7 and 66437, from Foochow, all by Sowerby, 

 representing adults and young, testify to the uniformity of this 

 species in the region mentioned. Curiously enough, these are the only 

 specimens of true N. piscator^ which the National Museum has re- 

 ceived from China proper, with the exception of the type of Am- 

 phiesma flavlpunctatwin Hallowell, which is typical in scutellation 

 and structure, a remark perhaps not superfluous in view of the vari- 

 ous closely related forms which have been described since. 



NATRIX NUCHALIS (Bonlenger). 



1889. Tropidonotus swinhonis Guenther, Ann, Mag. Nat. Hist. (ser. 6), 

 vol. 4, Sept. 1889, p. 221 (Ichang, China) (not of 1868) ; in Pratt's To 

 Snows of Tibet, 1892, p. 241 (Ichang). 



1891. Tropidonotus nuchalls Boi'lenger, Ann. Mag. Nat. Hist. (ser. 6), 

 vol. 7, 1891, p. 281 (type-locality, Ichang, Hupeh, China; co types in 

 Brit. Mus. ; A. E. Pratt, collector) ; Cat. Snakes Brit. Mus., vol. 1, 1893, 

 p. 218, pi. 13, fig. 1 (Ichang). — Werner, Abh. Bayer. Akad. Wiss., 

 II Kl., vol. 22, pt. 2, 1903, p. 363.— Wall, Proc. Zool. Soc. London, 1903, 

 p. 86. 



Xatrix iriichalis Stejneger, Herp. Japan, Bull. U. S. Nat. Mus. No. 58, 

 1907, p. 294. 



Mr. Graham has sent no less than five specimens of this interesting 

 species from various localities about Moimt Omei, Szechwan. These 

 specimens show very little individual variation, and it is particularly 

 interesting to observe how constant is the consolidation of the long 

 fifth supralabial. The nuchal groove is also well marked. The in- 

 dividual scale formulas are shown in the appended table. 



