XXXV111 



INDE} 



PAGE 



k.. 





Onchidium 



. 34 







Onchidoridse 



. 37 







Onchidoris . 



. 37 







Opisthobranches 



. 10 







Opisthobranchiata 



1 







Organs of hearing 



6, 19 







Organs of smell 



6, 19 







Otolith.es . 



. 19 







Ova 



. 25 







Ovarium . 



. 14 







Ovate vesicles 



6, 13 







Parasites . 



. 26 







Pavois 



. 36 







Pelagella=Qomodoris. 









Pelta 



6 







Pennant, T. 



. 3 







Peplidia 



. 22 







Periodical appearance . 



. 23 







Phidiana 





App. 



xxii 



Phlebenterata 



6, 36 







Phlebenterism 



6 







Phosphorescence 



. 22 







Phyllidia . 



. 38 



App. 



xix 



Phyllirrhoe 



. 38 



App. 



xxiv 



Placobranchus 





App. 



xxiv 



Placomopherus 





App. 



xix 



Polybranches 



. 36 







Polybranchiata 



1 



App. 



xiv 



Polycera 



. 45 







citrina = Lessonii . 









cornuta = quadrilineata. 









cristata (Ancula). 









flava = quadrilineata. 









Lessonii 



. 45 







lineata= quadrilineata. 









modesta= Lessonii. 









ocellata 



. 45 







quadrilineata . 



. 45 







typica = quadrilineata. 









Polycerinae 



. 43 







Portal heart 



10, 15 







Prehensile collar 



. 12 







Proctonotus 



. 53 







mucroniferus 



. 53 







Progression 



. 20 







Pterochilus pule her =J&mbletoma, pulchi 



'a. 







Gen. 6, Desc. Fam. 1, PI. 17 



Fam. 



1, 



PI. 



24 



>} 





PI. 



23 



}) 





PI. 



22 



Gen. 18, Desc. Fam. 3, PI. 43 

 „ PI. 42 



