22 PROCEEDINGS OF THE NATIONAL MV8EVM. vol. 37. 



maiiider of the skull the supraoccipitals, the epiotics, the parietals, 

 the squamosals, and a portion of the right frontal can be detected, 

 although the boundaries of but three can be accurately defined. The 

 depression bounding the anterior outline of the skull is taken to be 

 the impress of the mandible, in which case this structure would be of 

 some depth, as in the case of the mandible associated with E. tahu- 

 latus Cope, to be described elsewhere. 



The present specimen is of interest in respect to the presence of 

 the lateral line canals, its small size, and its generic identity with 

 forms from Ohio. There is still another form known from the 

 Cannelton slates Erpetosaurus {Tuditanus) sculptUis Moodie. It 

 is No. 12315 of the University of Chicago collection. 



Measurements of Erpctosdunis mi nut us Moodie. 



mm. 



Length of skull 18 



Posterior width of skull !'<' 



Width of skull across orbits 1-1 



Length of orbit 4.5 



Width of orbit 3.5 



Interorbital width 3.5 



This specimen forms part of the Lacoe collection and is Cat. No. 

 4545 of the U. S. National Museum. 



Pectoral girdle provisionally associated with Erpetosaurus sculptUis 

 Moodie. 



The present specimen is preserved on a block of slate from Can- 

 nelton, Pennsylvania. It is associated with the previously described 

 Erpetosaurus (Tuditanus) sculptUis Moodie on account of its size 

 and the character of the sculpture. It may pertain to an unknown 

 species. There are preserved on the block of slate, besides the three 

 element of the pectoral girdle, other remains, but they are, for the 

 most part, too imperfectly preserved for recognition. Some of them 

 are phalanges, and I believe I detect a scapula in the rounded curved 

 plate lying near the right clavicle. The three pectoral elements, the 

 interclavicle and the two clavicles, are preserved intact with the 

 ventral surface uppermost. There are no evidences of pectoral ele- 

 ments other than the scapula. 



The specimen is particularly important as furnishing further evi- 

 dence of the simplicity of the microsaurian pectoral girdle, which 

 has been regarded by Jsekel as being extremely complex, in one 

 species at least, Diceratosaurus punctolineatus Cope. The three ele- 

 ments are broken, but either the elements or their impressions are 

 present, so that identification is possible. The elements are sculp- 

 tured with radiating grooves and ridges as in so many of the Micro- 

 sauria. The interclavicle is spatulate and bears a general resem- 

 blance to the same element of Mctoposanrus fraasi Lucas from the 



