3 4 Kept. 
IV, RE1TIL1A AND HATH AC ill A. 
position of the anus in certain Tadpoles. [Overlooking previous 
literature on the subject. — R ec.] 
W. Roux, Anat. Anz. viii, 1893, pp.C05-G09, writes on the first cleavages 
of Frogs’ eggs. G. Bohn, t. c. pp. 609-627, figg., remarks on the 
effects of pressure on the segmenting eggs of Frogs. 
T. H. Morgan & U. Tsuda, Quart. J. Micr. Sci. xxxv, 1894, pp. 373-405, 
pis. xxiv & xxv, contribute a paper on the orientation of the 
Frog’s egg. 
On the methods for obtaining half-embryos of the Frog ; W. Roux, 
Anat. Anz. ix, 1894, pp. 248-262 & 265-283. 
On the development of the endothelium of the heart in the Frog ; V. 
Roudnev, C.R. Congr. iut. Zool. Moscou, 1892, pp. 101-103. 
On the sphincter pupillas of the Frog ; A. Grukniiagen, Arch. ges. Phys. 
liii, 1893, pp. 421-427, pi. xiii. 
Phisalix & Bertrand, O.R. cxvi, 1893, pp. 1080-1082, O.R. Soc. 
Biol. (9) v, 1893, pp. 477-479, and Arch. Phys. norm. path, xxv, 1893, 
pp. 511-517, compare the toxic characters of the blood and dermal 
secretions of the common Toad. 
On the respiration of the Frog ; A. Dissard, C.R. cxvi, 1893, pp. 1153 
& 1154. 
On the action of running wator and light on Frog-tadpoles ; Camerano, 
Boll. Mus. Torino, viii, 1893, No. 140. 
On Frogs’ endurance of cold ; physiological experiments by M. M. Lund, 
Yid. Medd. 1893, pp. 125-165. 
RANIDiK 
Rana. On the Tadpoles with a ventral disk ; Boulenger, P. Zool. Soc. 
London, 1893, p. 526, pi. xliii, figs. 2-4. R. esculenta , var. rkli- 
bunda, Pall.: on Syrian larvae ; Camerano, Boll. Mus. Torino, viii, 
1893, No. 162, p. 2. R. temporaria , L. : on remarkable specimens 
from Scotland ; Boulenger, Scott. Natur. 1893, p. 202. R. agilis , 
Thom., recorded from Jersey by Boulenger, Zoologist (3) xvii, 1893, 
p.355 : from Linz, on the Rhine, by Melsiieimer, Yerh. Ver. Rhein- 
land, 1, 1893. Korr. p. 44: from E. Switzerland by O. Stoll, Viertei- 
jahrschr. Ges. Zurich, xxxvii, 1892, p. 337. R. aurora B. & G., boylii, 
Baird, and dray tout , B. & G.: notes by Stejneger, North Amer, 
Fauua, No. 7, 1893, pp. 225-227. R. areolata cesopus , Cope : note on 
the habits; Test, Science, xxii, 1893, p. 75. R. trinodis, Bttg. : a 
variety fromMozambique described by Pfeffer, Jahresber. Hamburg. 
Anst. x, 1893, p. 90. R. aspera, Blgr., femoralis , Blgr., and cowanii , 
Blgr., redescribed by Peracca, Boll. Mus. Torino, viii, 1893, No. 156, 
pp. 4-6. R. dorm , Blgr., p. 328, pi. viii, fig. 1, limborgii , W. Sclater, 
p. 329, pi. x, fig. 1, granulosa , And., p. 333, pi. viii, fig. 2, and 
nigrovittata , Blyth, p. 334, pi. viii, fig. 3, redescribed and figured by 
Boulenger, Ann. Mus. Genova (2) xiii, 1893. R. guentheri , Blgr., 
p. 331, and jerboa, Gthr. (= masotiii, Blgr.'), p. 335 : notes ; id. ibid. 
