Explanation of Plate H. 



Fig. 1. Di/ityonema (rassibnsale, new species 19 



(See also text figs. 21-25. ) 

 A portion of the rhabdosome, X 2, figured in text fig. 23. 



2. Dictyonema stenactinotuyn, new species 30 



(See also text figs. 34, 35. ) 

 View of the specimen, X 1-5, illu.^trated in text fig. 35. 



3. Callograptiis stricius, new species 15 



(See also text fig. 17. ) 

 The type-specimen, X 2. 



4. Acanthograj)tns granti Spencer 56 



(See also PI. 2, fig. 1, and text figs. 72-74. ) 

 Photograph by Gurley, with rhabdosome retouched in black. 



5. Acantltograptim chaetophorus, new species ." 61 



(See also text fig. 84.) 

 Photograph of the type specimen. X 1-5. 



70 



