9 6 



Station 133 occur in both the large areas. The species which were obtained most frequently 

 are scattered throughout the region from which Ctenostomes were obtained. This is the case, 

 tor instance, with Valkeria atlantica, which was found at 14 of the 29 Stations at which the 

 group was represented; while Nolella papuensis occurred at 12 Stations, Buskia setigera at 7, 

 and Valkeria tuöerosa at 6. It may be noted, however, that Arachnidiiuii irregulare, Arach- 

 noidea protecta and Victorella sibogae were only found at Stations 64, 71 and 213, three 

 localities lying close together off the S. end of Celebes. But as the first two of these species 

 were each obtained at only one Station, and the third at only two Stations, the number of 

 records is insufficiënt to prove much. 



There is perhaps sufficiënt evidence to warrant the general conclusion that Ctenostomes 

 do not fiourish where they are exposed to the full force of the open ocean. The headquarters 

 of this group in the Archipelago seem to be, as has already been pointed out, round the 

 W. end of New Guinea and from Celebes to the Islands from Java to Flores. Their absence 

 from the more exposed S. coast of Timor, and the fact that there is only one record of their 

 occurrence in the Sulu Sea ; — in both of which localities a considerable number of dredgings 

 were made; — may be significant. It is probable that the clistribution of the group depends 

 more on the nature of the locality (depth, character of bottom, etc.) than on any Geographical 

 considerations which are perceptible in the area investigated. 



It has been pointed out above that the distribution of the Entoprocta conforms in general 

 to that of the Ctenostomata. It may be remarked, however, that three species of this group 

 were obtained off the coast of Timor (Stations 60, 282, 285) and that none were found in 

 the Sulu Sea. 



Sub-Order II. CYCLOSTOMATA Busk. 



Cyclostomata Busk, 1852, J. MacGillivray's "Voy. 'Rattlesnake'", I, p. 346. 

 Cyclostomata Busk, 1859, "Monogr. Foss. Pol. Crag", Palaeont. Soc, p. 9. 



Fam. Crisiidae Johnston. 



Crisiadae (pars), Johnston, 1838, "Hist. Brit. Zooph.", Ed. 1, p. 260. 

 Crisiadae Johnston, 1847, Ibid., Ed. 2, p. 282. 



Crisia Lamx. 



Crisia (pars), Lamouroux, 1812, "Mém. class. Pol. coralligènes", Nouv. Buil. Sci. Soc. Philomat., 



III, p. 183. 



Crisia (pars), Lamouroux, 18 16, "Hist. Pol. Cor. Flex." p. 136. 



Crisia (pars), Lamouroux, 1821, "Exp. Méthod.", p. 6. 



Crisia (pars), Lamouroux, 1S24, "Encycl. Méthod.", "Zoophytes", p. 224. 



1. Crisia elongata Milne Edwards. (PI VIII, figs 1 — 8). 



Crisia elongata Milne Edwards, 1838, "Mém. Crisies", Ann. Sci. Nat., Zool., (2) IX, p. 203, 

 PI. VII, fig. 2 (Red Sea). 



96 



