Plate 2. 

 1—4. Dorocidaris panamensis A. Ag. ; all figures natural size ; Station 3368. 



1. Seen from the abactinal side to show the denuded abactinal system, the odd anterior 



ambulacrum, and the left anterior iuterambulacrum and ambulacrum. 



2. The same specimen, showing the same denuded parts of the test, seen from the actiual 



side. 



3. The same specimen, seen in profile, showing part of the denuded test facing the left 



anterior iuterambulacrum. 



4. The same specimen, seen in profile, showing part of the denuded test facing the odd 



anterior ambulacrum. 



