Eugasterella aranea nov. 



Page 57 



(See pi. 15, fig. 1) 



1 Portion of abactinal view of disk and proximal part of ray, 



showing the columns of ambulacrals continuing to the oral 

 frame with its small syngnaths ; the columns of semitubular 

 adambulacrals ; and the scaly covering of the. disk, x 5. From 

 gutta-percha squeeze. 



2 Actinal view of ray in distal portion, showing the overlapping 



adambulacrals ; ambulacrals not exposed, x 5. 



3 Abactinal view of ray near tip, showing very slender ambulacrals 



and similar adambulacral ossicles, x 5. 



4 Actinal view of portion of ray, with ambulacral groove and 



ambulacral plates well exposed, x 5. 

 Devonian: Upper Portage (Wiscoy shale) near Park Station, 

 N. Y. 



Eugasterella bicatenulata nov. 



Page 56 



(See pi. 14, fig. 5) 



5 Oral portion of actinal side, 'showing the syngnaths and their 



relation to the ambulacral and adambulacral columns, x 5. 

 From a gutta-percha squeeze of the type. 



6 Actinal view of distal portion of ray, showing the wide ambu- 



lacral groove, the alternating ambulacral ossicles and the 

 narrow column of spiniferous adambulacrals. x 5. From a 

 gutta-percha squeeze. 



7 Actinal view of a proximal portion of a ray, showing more 



distinctly the podial pits, x 5. From a gutta-percha squeeze. 

 'Devonian: Portage (Grimes) sandstone, near Naples, N. Y. 

 The originals of the figures are in the New York State Museum. 

 The enlargements are made with the camera lucida. 



