Barbour — A New Rock Iguana from Porto Rico. 147 



C. collet Gray, Jamaica and surrounding cays (extinct?). 



C. comuta (Bonnaterre), Haiti and neighboring islets. 



C. nigerrima Cope, Navassa Isl. (extinct?). 



C. stejnegeri Barbour & Noble, Mona Isl. 



C. portoricensis Barbour, Porto Rico (extinct). 



C. mattea Miller, St. Thomas (extinct). 



C. pinguis Barbour, Anegada (extinct?). 

 The existing place names and early literature and tradition prove that 

 Cyclura was previously found upon many other Bahaman Islands where it 

 has completely disappeared. 



Explanation op the Plate. 



A. Ventral view of left femur. 



B. Ventral view of left tibia. 



C. Dorsolateral view of left ulna. 



D. Dorsolateral view of right ulna. 



E. Posterior view of first sacral vertebrae. 



F. Dorsal view of distal extremity of left humerus. 



G. Dorsal view of proximal extremity of left humerus. 



