CONTENTS 
PAGE 
Distribution of the Nudibranchiate Gasteropoda in the Oceans, . . .1 
List of Hudibranchiata dredged by H.M.S. Challenger, ...... 2 
I. N udibranchiata Kladohepatica, Bergh, . . . . . . .2-51 
Family Phylliroid.®, . . . . . . . . . .3-8 
Phylliroe, Peron et Lesueur, . . . . . . .4-6 
atlantica, Bergh, . . . . . . . .5-6 
bucephala, Peron et Lesueur, ....... 5 
• Acura, H. and A. Adams, . . . . . . . .7-8 
pelagica , Adams, . . . . . . . .7-8 
lanceolata, Bergh, ........ 8 
Family -ZEolidiad.®, . ... . . . . . .8-30 
Fiona, Alder and Hancock, . . . . . . . .8-10 
marina (Forskal), . . . . . . . . .9-10 
(glandules ptyalinie), ....... 10-124 
Glaucus, Forster, .......... 10- 18 
atlanticus, Forster, . . . . . . . .16-18 
longicirrus, Reinhardt, Bergh, . . . . . .18 
Glaucilla briareus (Reinhardt), Bergh, . . . . . . .18 
Janolus, Bergh, . . . . . . . . . .18-23 
australis, Bergh, . . . . . . . .19-23 
Cuthonella, Bergh, ......... 23- 26 
abyssicola , Bergh, ........ 24- 26 
(Splanchnotrophus, Alder and Hancock), . . . . .26 
Rizzolia, Trinchese, ......... 27- 30 
australis, Bergh, . . . . . . . . .27-30 
Family Scyll^ada:, . . . . . . . . . .31-34 
Scyllcea pelagica, Linn6, . . . . . . . . .33-34 
Family Bornellid.®, . . . ' . . . . . . . 34- 43 
Bornella excepta, Bergh, ......... 36- 43 
Family Tritoniad.®, .......... 43- 51 
Tritonia, Cuvier, .......... 44- 47 
challengeriana, Bergh, ........ 45- 47 
Marionia, Yayssiere, ......... 48- 51 
occidentalis, Bergh, ........ 49- 51 
(ZOOL. CHALL. EXP. PART XXVI. 1884.) 
Cc 20 
