SIR C. ELIOT—REPORT ON THE NUDIBRANCHS. 37 
adopted the latter course. Species possessing a labial armature are found in 
genera which are defined as being without this feature (e. g., Platydoris and 
Staurodoris) ; and though strong plates or real jaws are an important character, 
the difference between a labial cuticle with a vestigial armature and one 
which is totally unarmed is very small and does not necessarily entail other 
structural differences. 
Very curious are the specimens of Doridopsis rubra, in which, as testified 
by the notes on the living animals as well as by the condition of the preserved 
specimens, the pockets of the rhinophores and branchize have almost dis- 
appeared, causing those appendages to become practically non-retractile. 
The list of species is as follows :— 
PLEUROLEURA GLABRA, Sp. Nov. 
LOMANOTUS VERMIFORMIS, sp. NOV. 
. CROSSLANDIA FuscA, Eliot. 
. MELIBE BUCEPHALA, Bergh. 
ANOLIDIELLA ORIENTALIS, Bergh. 
. ELYSIA GRANDIFOLIA, Kelaart. 
HEXABRANCHUS SANGUINEUS (Riippell & Leuckart,. 
NEMBROTHA LIMACIFORMIS, sp. nov. 
TREVELYANA STRIATA, Sp. NOv. 
10. OnoLA pacirica, Bergh. 
11. PLocamopHerts OCcELLATUS, Leuckart. 
12. Gontoporis cASTANEA, Alder & Hancock. 
13. CHRoMODORIS DIARDI (Kelaart). 
14. Car. QUADRICOLOR, Riippell. 
15. Cur. macutosa, Pease. 
16. Cur. PALLIDA (Riippell & Leuckart). 
17. CHR. INORNATA, Pease. 
18. THoRUNNA FURTIVA, Bergh. 
19. PLATYDORIS INCERTA (?), Juv., Hliot. 
20. DIscODORIS AMBOINENSIS (?), juv., Bergh. 
21. KENTRODORIS LABIALIS, sp. Nov. 
22. PERONODORIS DENTICULATA, Sp. Nov. 
23. ASTERONOTUS HEMPRICHI, Khrenberg. 
24, ARTACHHA CLAVATA, Eliot. 
25. ARTACHZA VERRUCOSA, Sp. nov. 
26. Dortpopsis RUBRA (Kelaart). 
27. Doripopsis NIGRA (Stimpson). 
8. Doripopsis sp. 
9, PHYLLIDIA VARICOSA, Lamarck. 
30. MARIONIA CYANOBRANCHIATA (Riippell & Leuckart). 
OW bo ke 
CSm ATO 
