238 COPE. [Vol. VII. 



The superior element is ilium, but the inferior does not appear 

 to be either pubis or ischium. Its position and direction are 

 not inconsistent with its identification with the femur ; but as it 

 occurs in snakes, which have a rudimental femur, it cannot be 

 that bone. 



Observations. The inferior element in the pelvis in this genus 

 is the same as that which I described as occurring in the African 

 form of this family, Feylinia {Attelytrops Hallow.), but the latter 

 differs in the absence of the rib-like ilium. It is interesting to 

 notice the resemblance between these genera, which are so 

 widely removed geographically. Feylinia, however, differs 

 further from Anelytropsis in the presence of a pair of clavicles 

 {loc. cit.). 



Feylinia currorii Gray. Described by me {Proceed. Acad., 

 Phila., 1864, p. 230). 



Scapular arch. This consists of a pair of osseous clavicles 

 which nearly meet on the median line. The anterior ribs to 



^Jj^ 



Fig. I. Fig. 2. 



Fig. I. Sternal region in Feylinia currorii Gray. From West Africa. CI, clavi- 

 cles; RR, ribs. Fig. 2. Pelvic element and adjacent part of vertebral column. 

 S, sacrum; Pv, pelvic element. 



the number of seven pairs meet on the median line by their car- 

 tilaginous haemapophyses, which are directed forwards at an acute 

 angle, the angle of the anterior pair intervening between the 

 clavicles. 



Pelvic arch. This consists of a single element lying on each 

 side of the vent antero-posteriorly, perhaps homologous with 

 the corresponding element in the Annulati. It is in contact 

 with the distal extremities of three ribs, and is connected by 



