MOODIE: MAZON CREEK, ILL., SHALES. B47 
MEASUREMENTS OF THE SPECIMEN OF AMPHIBAMUS GRANDICEPS COPE. 
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isength of skull -......... pyosz9a9500000R000000 15 
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Transverse diameter of the orbit................. 
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Diameter of the pineal foramen................. 
Length of cervical series of vertebre............. 
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Length of centrum of the dorsal series............ 
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Number of ventral scutelle in 1 mm.............. 
The specimen, with obverse, is No. 794 (1234) of the Yale 
Museum. 
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Amphibamus thoracatus Moodie, 1911. 
(Plate 5, fig. 2.) 
The chief diagnostic characters which will at once distin- 
guish the species are: the elongate arm, the large inter- 
clavicle, the shape of the vertebra, and the triangular skull. 
The portions of the animal which are preserved are: the 
impression of the skull with one orbit, the right humerus and 
radius (ulna ?), the interclavicle, the left clavicle, a single 
vertebral centrum with portions of others, and traces of the 
scutelle. These remains are so intermingled with the remains 
of plants that it has been quite difficult to distinguish bone 
impression from that of plants. This, however, has been 
done by whitening the fossils with ammonium chloride, when 
the texture of the fossils serves to distinguish the one from 
