Grier: a New Rhynchocephalian. 89 



Measurements. 



Cm. 



Width of cranium 1.6 



Length of cranium 2. 



Length of mandible 1.8 



Length of humerus 7 



Length of ulna 7 



Length of radius 65 



Length of 4th metacarpal 2 



Length of finger 8 



Length of femur 1.15 



Length of tibia 95 



Length of fibula 9 



Length of 4th metatarsal 45 



Length of toe i.i 



Distance cranium to pelvis 7.3 



Length of whole skeleton 9.5 



Si.\ species of the genus Homeosaunis have been described, viz: 

 macrodactylus, maximiliani , pulcJiellus, neptunia, jourdani and rhodani, 

 the last having been unfortunately described from only the pelvic 

 and caudal portions of the skeleton. In the form digitatellus, however, 

 the position of the skeleton within the matrix, as well as injuries 

 received during imbedding, preclude the use of many osteological 

 characters, which were of advantage in the identification and descrip- 

 tion of the other species which have been cited. Still, as the accom- 

 panying plate shows, the outlines or impressions of the more important 

 bones are clearly defined for accurate measurement and comparison. 



Upon consultation of the appended table of measurements prepared 

 from the species already described, the relative resemblances and 

 differences will become apparent. 



This species has a length of cranium which is proportionately less 

 in comparison with that of the body than in any other species of 

 Homeosaunis, except H. maximiliani, which it but slightly exceeds 

 in this respect. On the other hand, however, the length of the cranium 

 compared with the width is shorter than in the latter form. 



The relative length of the cranium to the femur greatly exceeds 

 that of any of the described species, while that of the humerus bears 

 a similar relation, which is closely approximated by //. neptunia, a 

 species, however, which is excluded from comparison by its diminutive 

 size. The ulna and tibia likewise differ, the former most resembling 

 ;' n size that of //. pulchellus, the latter being less than that of any other 



