File:Image from page 260 of "Bulletin of the Department of Geology" (1902).jpg

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Title: Bulletin of the Department of Geology Identifier: bulletinofde919151916univ Year: 1902 (1900s) Authors: University of California, Berkeley. Dept. of Geology Subjects: Geology Publisher: Berkeley : The University Press Contributing Library: Smithsonian Libraries Digitizing Sponsor: Biodiversity Heritage Library


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Text Appearing Before Image: 1916J Merriam: Fauna of Cedar Mountain Region 177 Rodentia DIPOIDES, near TORTUS (Leidy) Several specimens from Stewart Valley (locality 2027) represent a form near this species. (See figs. 11 to 13.) Measurements No. 19802 D. tortus D. curtus Length of lower premolar series 17.5 19.5 14.5 Pi, greatest anterposterior diameter 6.5 5.5 4.6 P4, greatest transverse diameter 4.8 4.7 3.8 Depth of jaw below M„ 9.5 14. 8.5

Text Appearing After Image: 13 Figs. 11 to 13. Dipoides, near tortus (Leidy). Cedar Mountain beds, Stewart Valley, Nevada. Fig. 11. Mandible with P4, no. 19802, X 2; tig. 12, P4, no. 19804, X 2; fig. 13, P4, no. 19803, X 2. MYLAGAULTJS ?, sp. A fragment of a large molar (no. 19801) from Stewart Valley (locality 2027) represents a mylaganlid form, but the tooth is too imperfect for specific determination. The specimen does not appear to differ distinctly from the fourth premolar of Mylagaulus, and may be referred provisionally to that genus. APLODONTIA ?, n. sp. A single upper premolar, no. 19798 (fig. 14), from Stewart Valley, (locality 2027) represents a rodent evidently belonging in the group of the Aplodontidae, but not corresponding exactly to any form known to the writer. It shows resemblance both to Meniscomys and to Aplodontia, but does not duplicate the characters of either. The crown of the tooth is worn down close to the large, very slightly divergent roots upon which it is supported. On the occlusal face there are at least four enamel lakes, which extend down almost to the lower end of the crown. The form of the crown, taken with the depth and the tendency to cylindrical form of the enamel lakes, suggests that the normal unworn crown was short hypsodont.


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current14:47, 20 February 2019Thumbnail for version as of 14:47, 20 February 2019680 × 494 (53 KB)Geo Swan (talk | contribs)=={{int:filedesc}}== {{Information |Description='''Title''': Bulletin of the Department of Geology '''Identifier''': bulletinofde919151916univ '''Year''': [https://www.flickr.com/search/?tags=bookyear1902 1902] ([https://www.flickr.com/search/?tags=bookdecade1900 1900s]) '''Authors''': [https://www.flickr.com/search/?tags=bookauthorUniversity_of_California_Berkeley_Dept_of_Geology University of California, Berkeley. Dept. of Geology] '''Subjects''': [https://www.flickr.com/search/?tags=booksu...

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