14 



EXPERIMENTS IN THE BREEDING OF CERIONS. 



are given on plates 7, 8, 9. These specimens are entered as Cat. 

 No. 234722, U. S. N. M., and No. 21 is selected to serve as the type 

 of this species. 



TABLE No. 1. Check series of Cerion viaregis. 



THE COLONY ON THE SECOND RAGGED KEY NORTH OF SANDS KEY. 



The northernmost colony is situated on the Second Ragged Key 

 north of Sands Key. Here 500 of Cerion viaregis were planted on a low 

 sandy ridge on the southeastern end of this small island in 1912. The 

 vegetation at this point is quite variable. Plymenocallis (commonly 

 called Amarillis in this general region) forms the most succulent portion 

 of the plant element, while Sporobulus virginicus and Gayoides imberbe 

 and a few scattered, shrubby plants furnish a scant covering for quite 

 a stretch of beach sand. The outer and inner edge of the dune is 

 fringed with a mangrove thicket. There is likewise a lot of piled-up 

 sea drift in places. 



