. The Canadian field-naturalist. Natural history. B Fig. la. Side and crown views of tooth of Desmostylus sookensis n. Fig. lb. Side and crown views of tooth of Desmostylus sookensis n. sp. rows of appressed columns with a single column at the posterior end. Each of these columns shows the characteristic round pit in the centre. The length of this tooth is 34 mm.; width: 24 mm.; height of columns: 17mm.; diameter of largest column: 15mm.; diameter of smallest column: 10mm. The second tooth was found in 1921 in a large block of sandstone which had been dis- lodged from the cliff and had fa
. The Canadian field-naturalist. Natural history. B Fig. la. Side and crown views of tooth of Desmostylus sookensis n. Fig. lb. Side and crown views of tooth of Desmostylus sookensis n. sp. rows of appressed columns with a single column at the posterior end. Each of these columns shows the characteristic round pit in the centre. The length of this tooth is 34 mm.; width: 24 mm.; height of columns: 17mm.; diameter of largest column: 15mm.; diameter of smallest column: 10mm. The second tooth was found in 1921 in a large block of sandstone which had been dis- lodged from the cliff and had fallen to the beach. The number of columns and their arrangement is the same as in the first tooth, but the second tooth in age, older than any of the formations in which D. hesperus has been found.^ The only other species in the genus Desmostylus is D. watasei Hay,'"' from Japan.^ This species is represented by one skull which was collected from sandstone situated some distance above a Miocene deposit. Taking into consideration the greater age of the Sooke formation, and also the presence of cingula on these teeth, they are, tentatively, named Desmostylus sookensis n. sp. The specimen in the Provincial Museum is the type Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa
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