the processes and protuloerances, which give to th« 

 fully developed adult its peculiar and ahnormal ap- 

 pearance,and present an almost typical crustacean or 

 copepod form. vmat we nave nere discovered wit: 

 reference to the development of tne horns and tne 

 otner processes of tne head lead us to the conclusi® 

 that these structures may fairly De compared wit* 

 the Knohs and cushions so often noted in the Panda- 

 rinae.and otner analogous structures on the under 

 side of the shield.to which we have often had oeea- 

 sion to call attention in what has preceded. 



The males of Pennella.as of the whole Lernasan 

 groixp.have hitherto escaped the attention of inves- 

 tiga'tors. To oe sure we have thi s hy Milne Edwa: 

 (p.522) »The male is very small, almost spherical, 

 and carries on its anterior end a conical sucKer 

 armed with some styliform appendages.and on its 

 ventral surface two pairs of very large suochell- 

 form hånds ,hy the aid of whieh it attaches itself 

 to the female«. But since this statement is 

 so totally unique and neither coincides with any 

 citation from other authors nor is supported hy a 

 closer investigation of those species of Pennella 

 on which males should he found.we are inclined to 

 *elie*e that this is only hased on Hordmann's figu: 



