84 THE COAL MEASURES AMPHIBIA OF NORTH AMERICA. 



the mandible and the cranial bones have the same slightly waved surface as in the 

 other species. Mandibles 3 cm. long and the teeth, which are about 15 in each 

 ramus of the lower jaw, are simple, with large pulp cavities, those of the maxillary 

 bone slightly enlarging upwards, and intermediate in form between the long, 

 slender teeth of H. longidentatum and the thick, obtuse teeth of H. dawsoni. 



Coal formations, South Joggins, Nova Scotia, in erect tree, discovered by 

 P. W. McNaughton, 1893. 



Genus FRITSCHIA Dawson, 1882. 



DAWSON, Phil. Trans. Roy. Soc. London, 1882, pt. n, p. 634. 

 LYDEKKER, Cat. Fossil Reptilia and Amphibia, pt. iv, p. 225, 1889. 



Type: Fritschia curtidentata Dawson. 



Body lizard-like ; limbs large and well-ossified, mandibular and maxillary teeth 

 conical, grooved at the apex. Abdominal scales slender and rod-like. 



Fritschia curtidentata Dawson. 



DAWSON, Phil. Trans. Roy. Soc. London, 1882, pt. n, p. 641, pi. 43, figs. 110-128. 

 DAWSON, Am. Jour. Sci. (3), xn, p. 444, 1876. 



Type: Specimen No. 3061-7, Peter Redpath Museum, McGill University. 

 There is also specimen No. R 449, in the British Museum (393, pt. iv, p. 225). 



Horizon and locality : Coal formation at the South Joggins, Nova Scotia. 



Represented by 2 specimens (plate 8). Bones of the head very smooth, only 

 a few microscopic punctures. Teeth conical, somewhat obtuse, striated at the inner 

 side of the apices; there are about 30 in each ramus of the mandible, and about 27 

 in the maxillary bone. Teeth implanted in a furrow. Vertebrae short and well 

 ossified, 3 in I cm. Ribs strong, curved, about I cm. in length. Limbs robust, 

 the bones better ossified than in any other known species from Nova Scotia. Toes 

 of foot probably 5, central ones long and slender. Interclavicle of moderate size 

 and somewhat rounded. Ventral scutellae needle-like. 



Length of mandible (imperfect) 2.1 cm. Length of femur 2.4 cm. 



Length of maxilla 2 cm. Length of radius and ulna i cm. 



Length of rib i cm. Length of toe in foot 7 mm. 



Length of humerus 2 cm. 8 teeth in 5 mm. 



