DOEIDID^. 



105 



** Gill-plumes retractile within separate cavities : 



D. Ulidiana. D. sparsa. _ 

 muricata. inconspicua. 



aspera. proxima. 



bilamellata. diaphana. 



depressa. oblonga. 



pusilla. 



■^^* Gill-plumes not retractile : 



D. pilosa. D. subquadrata 





i"^ 



#• 

 ■^ 



-'^(Swy- 





144 



145 



146 



Goniodoris (Foxho^^). Oblong; mantle small, 

 not covering tlie head and foot, simple ; tentacles 

 club-shaped, laminated, not retractile. 



G. nodosa. 



castanea. Fig. 144 ; f . 



Triopa (Johnst.). Oblong ; mantle margined 

 with filaments ; tentacles club-shaped, retractile 

 within sheaths. 



T. clavigera. Fig. 145 ; n. s. 



jEgirus (Loven). Oblong, covered with large 

 warts ; no mantle ; tentacles slender, retractile 



