NUDIBRANCHIATA. 541 



to whicli I hesitate to give generic rank and somewhat doubtfully refer to Staurodoi'is, 

 liberally interpreted : and a remarkable specimen of the Hexabranchidae, which has been 

 greatly distorted, but seems at least specifically distinct. The rediscovery of Pleuroleura 

 striata, v. Hass., is also interesting. 



The list of genera and species is as follows : 



HOLOHEPATICA. 



1. Marionia arborescens B. 15. Discodoris nieta B. 



2. * Doridomorpha gardineri nov. gen., nov. sp. 16. Platydoris eurychlamys B. 



3. Hexabranchus faustus B. 17. „ scabra (Q. and G.). 



4. „ digitatus nov. sp. 18. „ sp. 



5. Notodoris gardineri nov. sp. 19. Dictyodoris maculata nov. sp. 



6. Trevelyana crocea B. 20. Staurodoris pecten nov. sp. 



7. Nembrotha nigerrima B. ? var. 21. Trippa ornata B. 



8. Chromodoris elizabethina B. 22. Doridopsis nigra Stimpson, var. nigerrima B. 



9. „ rosans B. 23. „ apicalis B. ? 



10. „ pustulans B. 2i. Phyllidia varicosa Lam. 



11. Ceratosoma trilobatum Gray. 25. „ elegans B. 



12. „ gracillimum Semper. 26. Fryeria riippelii B. 



13. Discodoris concinna (A. and H.). 27. Phyllidiopsis striata B. ? 



14. „ pardalis (A. and H.) ? 



CLADOHEPATICA. 



28. PhurophyUidia gracilis B. 32. Madrella ferrugiuosa (A. and H.). 



29. *Pleuroleura striata (van Hass.). 33. Hermaea viinor B. ? 



30. Doto indica B ? 34. Cyerce nigra B. 



31. Phidiana unilineata (A. and H.)? 



Of these nos. 2 and 29 {Doridomorpha and Pleuroleura), both starred, are not from the 

 Maldive or Laccadive Islands. 



I have left undescribed eleven specimens which were too much injured to admit of 

 identification. Six were Dorids of soft consistency, without jaws, and with simply hamate 

 teeth: the remaining five were a small species of Chromodoris, possibly scurra, though, if 

 so, all trace of the characteristic coloration had disappeared. 



Though one of the best works ever published on the Nudibranchiata (Alder and Hancock's 

 Monograph of British Nudibranchiate Mollusca) is in English, little has been written in our 

 language on the group, and the exotic forms have received scant attention from our naturalists, 

 the greater part of what is known of them being due to the fruitful labours of Prof. Bergh'. 



' The reference letters S. R. stand for Prof. Bergh's " Malaoologische Untersuchungen, " published in Semper'a 

 Reisen im Archipel der Philippinen. 



