Plate 1. 



Figs. 1, 2. Malthopsis si)ii)ulos.'i Ganiian. 



Fig. 1. The ventral side of a specimen. Drawing; slightly reduced ; o, doubtful bnd-like 



marginal organs. 

 Fig. 2. Ventral side of the left half of a specimen. Photograph ; slightly magnified ; o, 



doubtful bud-lil<e marginal organs. 



Figs. 3-5. Ipnops agassizii Garmau. 



Fig. 3. The head seen from above. Drawing; natural size; d, radiating discs. 



Fig. 4. The head seen from above. Photogiai)h ; slightly magnified; d, radiating discs. 



Fig. 5. The fish seen from the side. Drawing; natural size; d, radiating disc. 



