6O THE COAL MEASURES AMPHIBIA OF NORTH AMERICA. 



stoma punctatnm, Necturus maculosus, Diemyctylits torosus, D. I'iridcscens, etc.) is 

 much more complex than that exhibited by the specimen under discussion. A very 

 near approach to the condition found in Eumicrerpeton parvum is found in an imma- 

 ture branchiate individual of Diemyctylits torosus, 56 mm. in length, from a fresh- 

 water pond on Mount Constitution, on Orcas Island, Puget Sound, Washington. 



The similarity of the intestinal structure is of considerable importance to our 

 understanding of the relationship existing between the Carboniferous Branchio- 

 sauria and the modern Caudata, and only confirms other arguments, offered in 

 another place (459), concerning their immediate relationship. 



The branchiosaurian affinities of the present species are almost too evident to 

 need discussion. The entire structure is essentially similar to that of other genera 

 of the order. 



The third specimen of this species (No. 4400 of the U. S. National Museum) is 

 almost as perfectly preserved as were the other two specimens. The skull structure, 

 the intermediate position of the pineal foramen, the epiotic notch, and the shape of 

 the skull are essentially similar to the described specimens of the species. The 

 present specimen is more developed than the other two and probably represents 

 an adult. The alimentary canal is perfectly preserved. 



It is nearly half again as long as the smallest of the above-described specimens, and 

 the skull is proportionately longer and wider. There is preserved also an impression 

 of the anterior ends of both clavicles. The right humerus is imperfectly preserved, as 

 is also the right femur and tibia; other than these the fossil is merely an impression. 



The skull is so similar to those described above that additional description is 

 unnecessary. The pineal foramen is quite large and lies on a line which cuts the 

 orbits into equal longitudinal parts. The interorbital space is about equal to the 

 long diameter of the orbit. Traces of sclerotic plates are observed in the left orbit, 

 but they are quite imperfect. 



The alimentary canal (fig. 140) is unlike the previously described structures, in 

 that the intestine is longer and more convoluted. It lies in five longitudinal folds and 

 ends in an enlarged cloaca, near which there are impressions of two glands, or the pos- 

 terior ends of the oviducts, as was suggested for the Yale specimens. The creatures 

 undoubtedly fed on small plants and animals much as do the recent salamanders. 



MEASUREMENTS OF EUMICRERPETON PARVUM MOODIE. 



No. 803 (222), Yale University Museum: mir >- No. 4400, U. S. National Museum: mm. 



Length of animal ........................... 37.5 Leng th of entire animal ....... 4.=, 



Length of skull ............................ 4.5 Length of skull ............. ... 6 



Posterior width of skull at table .............. 6 ' Width of skull ................. ..... 9 



Long diameter of eye ....................... 1.75 Transverse diameter of orbit .... ..... 1.50 



Transverse diameter of eye ................... 65 Long diameter of orbit ...................... 2.25 



Length of left humerus ..................... 1.50 Interorbital space .................... 2.50 



Number of ventral armature rods in i mm .... 10 Diameter of pineal foramen ................. 50 



Length of femur ........................ 1.75 Length of body from back of skull to pelvis . . 22 



Width across base of tail impression .......... 3.5 Greatest width of body ..................... 9 



Length of tail from base to tip .......... . 17 Length of tail ............................. 1 



NO 8o 1 ' Yale University Museum: 



i . 3 



3 ? Length of femur . ... 2.50 



of skull.. 

 Length of oesophagus .... 3.5 S s oach . 



< 33 (estinu,,,, 



Estimated length of intestine . . 18 



Width across base of tail impression .......... 2.5 



Length of tail from base to tip ............... 7 



