28 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.37. 



LARGE RIB. 

 Plate S, fig. 4. 



There is preserved on a block of soft coal a portion of a very large 

 rib, which, with its impress (Cat. Nos. 4489, 4490, U.S.N.M.), repre- 

 sents the possible presence of a labyrinthodont type of animal in the 

 Linton beds. The rib is very strong, slightly grooved, and is curved. 

 There is a tendency to a bicipital condition but the extreme head is 

 lost. The bone is solid and well formed and resembles no fish rib 

 with which the writer is acquainted. It may be tentatively asso- 

 ciated with the skull described elsewhere" as Macrerpeton huxleyi 

 Cope. 



I am under obligations to Mr. G. Dallas Ilanna, of the University 

 of Kansas, for the line drawings of Plates 2 and 4. 



EXPLANATIONS OF PLATES. 

 Pt.atk 4. 

 The type specimen of Isodectcft pinictiihitiis Cojie. Cat. No. 44.^7, TT.S.N.M., 

 about natural size. After Williston. 



Plate 5. 

 Outline drawing of the sl^eleton of Isodectva punctuhitim Cope, shown in pi. 

 4. About natural size. 



Plate 0. 

 Fig. 1. Type si)ecimen of Tuditauiis walcotii Moodie Cat. No. 4474, U.S.N.^L 

 Natural size. 

 2. Second si)ecinien of Tndit(uni>i iralcoHi Moodie, Cat. No. 44S1, U.S.N.M. 



Natural size. T=tarsus. 

 8. Type of Odoiifcrjicfon friannnlnris Moodie. Cat. No. 4-l(r), T\S.N.:M. X 3. 



Plate 7. 

 Fig. 1. Outline drawing of the type of Tuditaiiiis walcotti ^Moodie showing the 

 impression of the body and tlie muscle structure at " .1/." X 2.r). 



C7=clavicle; F=frontal; /'V=femur; //=humerus; »=uostril; 

 0=orbit; ^j=parietal; 72=rib; S=supra-occipital ; r=vertebra ; 

 ?/= pineal foramen. 

 2. The left leg of the second siiecimen of TiidUanin^ irulroiti Moodie. X 3. 



Plate 8. 

 Fig. 1. Type (Cat. No. 4545, U.S.N.M.) of Erpetosaurun minuiuH Moodie, X 5. 



2. Type (Cat. No. 4555, U.S.N.M.) of Tuditanus minimus Moodie. X 1. 



3. The skeleton (Cat. No. 4458, U.S.N.AL) of PtijoiiittK iiretiiiatus Cope. 



X 1. 



4. Large rib. X 1. (Cat. Nos. 4489, 4490, U.S.N.M.) 



Plate 9. 

 The skeleton of SaurvrpeUm latithora.P Cope. X l..^». (Cat. No. 4471, 

 U.S.N.M.) 



Plate K). 

 The skeleton of Ctrnrrpeton aJicohttum Cope. X 1. (Cat. No. 4475, 

 U.S.N.M.) 



"Moodie. Journ. Geol.. vol. 17, 1909, p. 72. 



