PLATE XLIL 
riO&. 1-5. Fragments of lower jaw and dentil,ion of Calamodou arcaniccnvs, natural size. 
Fig. 1. Left mandibular ramus, outer side; a portion of the external wall wanting, displaying the inner 
sides of the alveoli; a, the same, viewed from above; h, inferior view' of the same. 
Fig. 2. A xiortion of the inferior border of the right ramus, view'ed from above, so as to display the fuudus 
of the incisive alveolus. 
Fig. 8 . Extremity of the left inferior incisor, front view; a, internal aspect; b, i>osterior as{)ect; c, ex¬ 
ternal view. 
Fig. 4. A fragment from the inner side of the right inferior incisor. 
Fig. 5. An inferior molar tooth; a, lateral view ; b, anterior view ; c, superior view. 
Fig. 6. Condyle and adjacent part of the mandibular ramus of the specimen of Calamodon simplex figured 
on the nexExilate, natural size; a, from front. Page 166.. 
Fig. 7. Base of coronoid i)rocess and adjacent part of ramus, of the same specimen, outer side. 
Fig. 8. Fragment of the same specimen, of uncertain reference; a, lateral view. 
