Plate X. 



Figure!. — Pasiphae tarda Kroyer ; from the Gulf of Maine; lateral view, three- 

 fourths natural size. 



Figure 2. — Hippohjte Grcenlandica Miers; female from the Ba.y of Fundy; lateral 

 view, one and a half times natural size. 



Figure 3. — Eippolyie securifrons Norman ; female from off Massachusetts Bay ; lateral 

 view, one and a half times natural size. 



Figure 4. — Axius serratus Stimpson; dorsal view of the original specimen in the col- 

 lection of the Peabody Academy of Science, Salem. Figure 4a, lateral view of the 

 right cheliped. 



