Plate VII. 



TTynlnf^rvf^ fiar/nmiens/-^ It. P. 88. 



V\'j;. 1. The tyiie-s]x>cimen, which i-^ ]trol);il)ly to lie tntiiid proRervpcl at 

 Amherst Colleor,. (Pn,f. ]>,. K. Emkhkox), Mass., U. S. A. About 

 1 nat. tize. 



Fio's. 2, 3. Dermalia. 300 x . (Fig'. 3 is not gnod, tlu- rays Ix-iiig ihawii 

 relatively too short or too thick). 



Fig. 4. Gastralia. 300 x . (This figure is again not good, the rays l)oing 

 drawn relatively too sliort or too thick). 



Fig. .5. Discohexaster. 300 x . 



Fig. 6. Ilypoderinal oxypentactin, TOO x . 



Figs. 7-10. Oxvhexasters. 300 x. Fig. 7, a hexactinose form. Fig. 8, 

 an exceptional degenerate I'orm in which the rays are reduced to 

 only four in number. Figs. 9 and 10, hemihexactinose forms. 



