122 COLLECTIONS FROM MELANESIA. 



and that the last-named naturalists were followed by Dujardin and 

 Hupe. I am led to make these remarks from the fact that through- 

 out the ' Eevision of the Echini ' the mode of spelling which is both 

 etymologically and historically incorrect is not only adopted, but is 

 ascribed to Valenciennes, to Liitken, and to Verrill, and is, curiously 

 enough, carried on into the lately published Report on the Echi- 

 noidea collected by the ' Challenger ' Expedition. 

 Port Jackson. 



13. Echinometra luciinter. 

 A. Affassiz, Rev. JEch. p. 431. 



Port Molle (beach) ; Levuka, Fiji. 



14. Fibularia volva. 

 A. Affassiz, Rev. JEch. p. 509. 

 Prince of Wales Channel. 



15. Clypeaster humilis. 

 A. Affassiz, Rev. Ech. p. 510. 



Port Molle (4 fms.). 



16. Lagarmm depressum. 

 A. Affassiz, Rev. Ech. p. 518. 



Torres Straits ; Prince of "Wales Channel. 



The British Museum contains specimens collected by H.M.S. 

 ' Challenger ' in the Arafura Sea. 



17. Laganum decagonale. 



Peronella decagonalis, A. Affassiz, Rev. Ech. p. 520. 

 Laganum decagonale, Bell, Ann. cy Mag. N. H. (5) xi. p. 130. 



The investigations which I have been able to make into the value 

 of the generic and specific characters of the Laganidas (Ann. & Mag. 

 Nat. Hist. (5) xi. p. 130) have led me to the conclusion that no 

 valid grounds exist for the generic or subgeneric separation of 

 " Peronella " from Laganum. 



Prince of Wales Channel ; Thursday Island. 



This appears to be one of those species around which misappre- 

 hensions have collected ; the earlier and not ungraceful method of 

 registration which induced De Blainville* to associate with this 

 species the name of the naturalist to whom he owed his specimen 

 has, no doubt in haste, been regarded by Professor Alexander 

 Agassizf as indicating Lesson to be the author of the species. 



* Diet. Sci. Nat. vol. xlviii. p. 229; Man. d'Act. p. 215. 

 t Rev. Ecii. p. 47, and much less accurately on p. 148. 



