Dr. A. Giinther on a new Species of Frog . 387 



arenaceous recent Lituolce. which m j deep-sea explorations have 

 supplied, — the sand-grains of Parheria^ however, chiefly 

 consisting of phosphate and carbonate of lime, whilst those 

 of Lituola are of quartz cemented with phosphate of iron. 

 I must own myself unable to understand Mr. Carter's hypo- 

 thesis of a " reticulated fibre converted by fossilization into 

 calc-spar,and coated with a granular crystallization of yellowish 

 calcareous material,^^ and submit that no inferences from the 

 appearances presented by a wholly or partially infiltrated 

 specimen should be set against the facts readily discernible in 

 one which shows every indication of having remained, save 

 as regards the disappearance of the animal, exactly as it was 

 when first formed. 



XLI. — Description of a new Frog from North-eastern Asia. 

 By Dr. Albeet Gdnther, F.R.S. 



Rana DyhowsMi. 



Allied to R. esculenta. Snout depressed, rather pointed, 

 of moderate length, with the canthus rostralis very obtuse. 

 Tympanum indistinct^ much smaller than the eye. The 

 vomerine teeth form two short, distinctly convergent rows 

 between the inner nostrils. A very faint glandular fold on 

 each side of the back ; otherwise the skin is smooth. Hind 

 limbs of moderate length, the distance between vent and 

 knee being half the length of the body. Tips of the 

 fingers and toes not swollen ; the latter broadly webbed, the 

 web extending nearly to the tips of the fifth and third toes. 

 No cutaneous fringe along the outer margin of the fifth toe. 

 Metatarsus without lateral fold, but with two tubercles, the 

 inner of which is oblong, the outer very small and scarcely 

 distinct. The fifth toe is a little longer than the third, and 

 the fourth much longer than either. Thumb of the male with 

 two large swollen callosities. Vocal sacs small, internal, one 

 below each angle of the mouth, with very small openings. 



The specimen is nearly uniform olive-green above, with a 

 few irregular black specks in the middle of the back. Lower 

 parts white ; throat and abdomen finely mottled with olive- 

 green. 



Length of the body 63 millims., of the hind limb 110, of 

 the fourth toe 37. 



We have received one adult male from the Warsaw 

 Museum, which obtained it with other objects collected by 

 Dybowski in Abrek Bay, near Wladiwostok, in lat. 43° N. 



