yo 



A. brasiliensis Busk (1886, p. 34, PI. VII, figs 2 — 2e) resembles A. distans in many 

 of its characters, but is a more robust species, its sterns being about twice as broad as those 

 of A. distans. The respective diameters are given by Busk as '3 mm. and -15 mm. 



It is not impossible that the present species is identical with A. accrvata, described by 

 Lamouroux (1824) from Japan. 



Bowerbankia Farre. 



Bowerbankia Farre, 1837, Phil. Trans., p. 391. 

 Bowerbankia Hincks, 1880, "Hist. Brit. Mar. Pol.", p. 51S. 



Bowerbankia Waters, 1910, "Rep. Mar. Biol. Sud. Red Sea", "Bry. II", J. Linn. Soc. Zool., 

 XXXI, p. 240. 



Zooecia arising irregularly from an erect or creeping axis, commonly in definite groups. 

 Tentacles 8 — 10. Gizzard present. 



Mr Waters 1 ) regards Bowerbankia as a synonym of Zooèotryou Ehrenberg, 1831. In 

 this conclusion I am not at present prepared to follow him ; as it seems to me that the zoarial 

 characters are sufficiently distinct to warrant the separation of the two genera. I am, however, 

 in agreement with him in thinking that Bowerbankia biserialis Hincks 2 ) is a synonym of Z. 

 pellucidum ; that Vesicularia bilateralis MacGillivray 3 ) and an unnamed form described by 

 Macdonald 4 ) belong to the same genus, if not to the same species ; and that Dedalaca 

 manritiana Quoy and Gaimard 5 ) is probably also referable to Zoobotryon, as was suggested 

 by de Blainville °). 



It may be noted that "Zoobotryon sp." has been recorded by Whitelegge 7 ) from the 

 neighbourhood of Sydney ; and that Z. pellucidum has been described by Miss Philipps s ) from 

 the Isle of Pines, New Caledonia. From the Atlantic region the same species has been recorded 

 from Brazil (F. Muller, 1860), Florida (Osburn, 1914) and Bermuda (Smallwood, 19 10). In 

 spite of its wide distribution I have not, however, found it among the 'Siboga' dredgings. 



1. Boiverbankia imbricata Adams 9 ) (? sp.). (PI. VII, figs 15, 16). 



Sertularia imbricata Adams, 1800, "Descr. Mar. An. Wales", Trans. Linn. Soc., V, p. 11, 



PI. II, figs 5— 11. 

 Bowerbankia imbricata Waters, 1910, "Rep. Mar. Biol. Sud. Red Sea", "Bry. II", J. Linn. 



Soc. Zool., XXXI, p. 248, PI. XXV, figs 6—10. 



1) Waters, A. W., 1910, t. cit., pp. 240, 244. 



2) Hincks, T., 1887, Tol. Adriat.", Ann. Mag. Nat. Hist. (5) XIX, p. 309, PI. IX, figs 6, 6 a. 



3) MacGillivray, P. H., 1889, "S. Austr. Pol.", Trans. Proc. R. Soc. S. Austr., XII, p. 30, PI. II, fig. 4. 



4) Macdonald, J. D., 1857, "Brief Descr. Cten. Pol.", Proc. Roy. Soc, VIII, p. 383 (reprinted, under the same title, in Ann. 

 Mag. Xat. Hist. (2) XIX, 1857, p. 390). 



5) QüOY and Gaimard, "Voy. Astrolabe", "Zool.", IV, 1834, pp. 299 — 301; III, 1835, p. 952 (expl. of Plate); Atlas, "Zooph.", 

 PI. XXVI, figs 1, 2, 2 1 . For dates of publication see Siiert.orn and Woodward, Ann. Mag. Nat. Hist. (7) VIII, p. 333. 



6) Blainville, H.M.D. de, 1834, "Man. Actinol.", pp. 679, 680; see also pp. 493, 494, PI. LXXXI, figs 6, 6a. De Blainville's 

 actual words are "Il faut sans doute rapprocher de ce genre (Dctfalaea) celui que M. Ehrenberg nomme Zooiotrion". 



7) Whitelegge, T., 1889 (1890), p. 293. 



8) Philipps, E. G., i899,pp. 441, 450. 



9) The description and figures of this author are hardly recognisable ; but in view of the desirability for stability in nomenclature, 

 it seerns to me best to assume that Adams' species was the one generally known as Bowerbankia imbricata. 



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