Further observations on the nervous system of the American leopard frog (Rana pipiens) compared with that of the European frogs (Rana esculenta and Rana temporaria) / Henry H. Donaldson.

  • Henry Herbert Donaldson
Date:
1910
Catalogue details

Licence: In copyright

Credit: Further observations on the nervous system of the American leopard frog (Rana pipiens) compared with that of the European frogs (Rana esculenta and Rana temporaria) / Henry H. Donaldson. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    this treatment reduces the length of the femur by 0.70 per cent making it 99.30 per cent of the fresh length, the tibia by 0.73 per cent making it 99.27 per cent of the fresh length; the foot (tarsus-pes) by 1.54 per cent making it 98.46 per cent of the fresh length. These corrections were applied before the data were used in tables 7 and 8. TABLE 6 Body weight per millimeter of total length. Averages from groups of three BODY WEIGHT PER MILLIMETER, IN GRAMS .102 .135 .168 .218 f15.9 .114 R. esculenta 1904 J 22.0 .134 j 35.0 [2]* .199 [40.2 .208 f 23.4 .146 R. esculenta 1909 ) 32'1 177 143.8 .225 [55.2 [2] .262 f15.9 .107 R. temporaria 1904 I 23.1 .137 ^ j 28.0 .162 [31.3 .177 18.0 [4] .116 25.2 .151 R. temporaria 1909 • 26.9 .159 29.5 .173 34.8 .191 (A) AVERAGE AMOUNT OF BODY WEIGHT FOR EACH MILLIMETER OF TOTAL LENGTH The general form of the specimens examined is obtained by dividing the body weight by the total length (table 6). The data in this table are given in Chart 1 and show that in the years R. pipiens. BODY WEIGHT IN GRAMS 14.9 23.2 30.8 43.2