It will l from the table that of the thirteen species collected, thrt-<- v 



iously known, t\\<> are represented by material insufficiënt for identification, and èight are 

 ribed as new. 



Systematic description oi genera and species oi Isn.i 

 11 1' the Siboga collection. 



Isidinae. See the definition of this subfamily on p. 3 



Isis Linnaeus. 



[sis (in part) Linnaeus. Hortus Cliffortianus, 1737. p. 479. 



in part Linnaeus. Systema Naturae, 1758, p. 1287. 



in part Pallas. Elenchus Zoophytorum, [766, p. 220. 



m part) Ellis and Solander. Natural History of Zoophytes, 17.S6, p. 104. 

 /sis (in parti Esper. Die Pflanzenthiere, Vol. I, 1791, p- 27. 

 [sis Lamouroux. Hist. Polypes coral. flexibles, 18 16, p. 4687. 

 /.<:.< Lamouroux. Exposition Méthodique, 1821, p. 39. 

 [sis Lamarck. Hist. Nat. Anim. sans Wit., 1856, p. 473. 



[sis (in part) Milne Edwards et Haime. Hist. nat. des Coralliaires, Vol. 1, [857, p. 193. 

 [sis Gray. Proceedings Zool. Society of London, 1857. 

 Isis K<dliker. Icones Histiologicae, II. 1865, p. 140. 



/sis Dana. Synopsis Report on Zoophytes of the Wilkes Expedition, 1859, p. 144. 

 Isis Studer. Versuch eines Systemes der Alcyonaria, [887, p. 46. 

 Isis Wright and Studer. Challenger Reports, the Alcyonaria, 1889, p. XLV. 

 /sis Thomson and Simpson. Alcyonarians of the Indian Ocean, 11, Alcyonarians of the Deep 

 Sea, 1909, p. 1S0. 



The original genus Isis included not only all of the present Isida, but also certain of 



MelitodicLe, and resulted in the same confusion as in the synonymy of the family Isidee. 



Lamouroux (1S16) appears to have used the name in almost its modern signification ; but 



subse(]uent writers included many other forms, until Grav (1857) restricted the genus. Kölliker 



1865) was the fust to carefully describe the spicules and use them in his generic definition, 



and subsequent writers have used the name as understood in the present work. 



This being the only genus of the subfamily Isidina, the definition already given for the 

 Isidinae will serve for the genus. 



The type species of this genus is Isis hippuris Linn., and the only other known species 

 in the Isis reticulata described beyond. 



1. Isis hippuris Linnseus. (Plate I. figs. 1, \a, \l>-. Plate V, tig. 1). 



hippuris (in part) Linnseus. Systema Naturae, [2'h Edition, p. 12S7. 



Isis hippuris (in part] Pallas. Elenchus Zoophytorum, 1766, p. 233. 



Isis hippuris Kllis and Solander. Natural History ol Zoophytes, [786, p. 105. 



/sis hippuris (in part) Esper. Die Pflanzenthiere, Vol. I, 1791, p- 279. 



/sis hippuris Lamouroux. Histoire Polypiers coralligènes flexibles, 1816, p. ., 



Isis hippuris Lamouroux. Exposition Méthodique, [821, p. 39. 



Isis hippuris Lamarck. Histoire Naturelle des animaux sans vertèbres, 1836, p. 475. 



