﻿NO. 15 



SMITHSONIAN EXPLORATIONS, I92I 



51 



the middle, thus making them 3 by 6 feet, and 3 feet high. In these 

 there were placed the following combinations : 



No. 47, 25 each of Cerion incanuvi and Cerion viarcgis. 



No. 48, 25 each of Cerion incanum and Cerion casablaiicac. 



No. 49, 25 each of Cerion iiiccDitiiii and Cerioi irca. 



No. 50, 25 each of Cerion incanum and Cerion crassilahris. 



Fig. 50. — A portion of the monel metal wire cages used in Cerion breeding 



experiments. 



No. 51, 25 each of Cerion viaregis and Cerion uzv. 



No. 52, 25 each of Cerion z'iaregis and Cerion crassilahris. 



No. 53, 25 each of Cerion casablancae and Cerion nva. 



No. 54, 25 each of Cerion casablancae and Cerion crassdabris. 



No. 55, 25 each of Cerion nva and Cerion crassilahris. 



In cage 56 there were placed 203 young of various sizes of the huge 

 new form collected in Middle Bight, Andros, which Doctor Bartsch 

 has called Cerion may on. 



Two additional species were introduced this year on Loggerhead 

 Key, one Cerion niayori, as above stated, and the second, Cerion 

 incanum, as also stated above, but of this species a large colony was 



