AMPHIPOD GENUS PARATHEMISTO BOWMAN 



349 



Figure l.—Parathemisto pacifica Stcbbing: a. Three stages in the development of male an- 

 tenna 1, from specimens 3.8, 4.5, and 5.0 mm. in length, off California; b, antennae 1 

 and 2 of very young female; c, same of very young male; d, four stages in the develop- 

 ment of oostegites (unshaded outline) showing size relative to gills (shaded outline); e, 

 dorsal (above) and dorsolateral views of portion of digestive system, showing origin of 

 digestive caecae from anterior part of midgut. Parathemisto japonica Bovallius:/, La- 

 bium; g, maxilla 1; h, palp of maxilla 1, flattened; i, maxilla 2;;, maxilliped, inner plate 

 and left outer plate omitted; k, uropods and telson; /, uropod 3, distal end. Scale ap- 

 plies to/-;. 



