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and found to hear many points of resemManco with T. proUfera ; 

 the spicules, for instaiice, agree well with those ilgnred hy 

 Lsiackmann for that species (oji). clt. p. 87), and the stem walls 

 are very thin. At the same time, it was taken from the same 

 locality (Pulo Bra-ni) as one of the larger specimens which ini- 

 donbtedly belongs to the species T. rwpicola. Moreover, another 

 specimen was intermediate in every particular between the 

 above exceptional form and the larger examples, Avhich had been 

 assigned without difficulty to T. rupicola. As this small specimen 

 was evidently very young, one would not wish to attach too deep 

 a significance to the observations made or to draw any hasty 

 conclusions from them. At the same time, it is well within the 

 range of possibility that the accumulation of such knowledge 

 may lead eventually to a reduction in the number of species of 

 Telesto. 



An Historical Summary of the Genern. JVephthj/a, DendronejyJdhya, 

 and Stereo)iephthi/a, with reasons for i'eta,ining the definitions 

 of these genera of the family Nephthyidje as enumerated 

 by Kiikenthal. 



Genus Nephthya Savigny. 



1817. Nepldhee Savigny, Descr. de I'Egypte, Hist. Nat. Suppl. i. 



Atlas, Polypes, tab. 2. fig. 5. 

 1828. Neplhihea Audouin, Ex})lication sommaii'e dcs Planches de 



polypes de I'Egypte et de la Syi'ie, ])ubliees par Jvdes- 



Cesa.r Savigny dans : Description de I'Egypte, vol. xxiii. 



Paris. 

 1834. Nephthya Ehrenberg, Die Corallenthiere des Eothen 



Meeres, p. 284. 

 1846. Nephthi/a Dana, 'Zoophytes,' Philadelphia, p. 610. 

 1857. Nephthya Milne-Edwards, Histoire Naturelle des Coral- 



laii-es, vol. i. p. 127. 

 1877. Nephthya Klunzinger, Die Korallthiere des Ilothen Meeres, 



Th. l,p. 33. 

 1887. Nephthya Studei-, in Arch. Naturg., Jg. 53, vol. i. pp. 19, 



20. 

 1887. Nephthya (paivs), Danielssen, in Norskc Nordhavs Exp. 



vol. v. p. 82. 

 1889, Nephthya and /.V^^ov^c/OfZes (pars) Wright & Studer, 'Chal- 

 lenger' lleports. Zoology, vol. xxxi. p. xxv, 

 1895. S'pomjodes (pars) Holm, in Zool. Jalirb., Bd. 8, p. 24. 



1895. ISpongodes (pars) Kukeuthal, in Zool. Anz., Jg. 18, ]). 428. 



1896. Nephthya Kiikenthal, in Abh. Senckenb. Ges. Frankfurt, 



vol. xxiii. pp. 89-91. 

 1899. Nephthya May, in Jena Zeitschr. Naturw. vol. xxxiii. p. 156. 

 1903. Ne2>hthya Kiikenthal, in Zool. Jahrb., Bd. 19, p. 141. 



In 1817 Savigny described two genera of Nephthyida) to which 

 he gave the names Amwothee and Nephthee. Audouin (1828), 



