NO. 15 



SMITHSONIAN EXPLORATIONS, I92I 



51 



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

 there were placed the following combinations : 



No. 47, 25 each of Ccrion incanum and Cerion viaregis. 



No. 48, 25 each of Cerion incanum and Ccrion casablancac. 



No. 49, 25 each of Cerion incanum and Ccrion nva. 



No. 50, 25 each of Cerion incanum and Ccrion crassilabris. 



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



experiments. 



No. 51, 25 each of Ccrion viaregis and Cerion nva. 



No. 52, 25 each of Ccrion viaregis and Ccrion crassilabris. 



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



No. 54, 25 each of Ccrion casablancac and Ccrion crassilabris. 



No. 55, 25 each of Ccrion nva and Ccrion crassilabris. 



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 Ccrion niayori, as above stated, and the second, Cerion 

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



