Elzerina blainvillii Lamx, 1824, "Encycl. Méthod.", "Zoophytes", p. 317. 



Elzèrina blainvillii Blainville, 1S34, "Man. Actinol.", p. 453, PI. LXXX, figs 2, 2 a. 



Elzerina blainvillii Milne Edvvards, 1836, LAMARCK's "Hist. An. s. Vert.", 2 Ed., II, p. 240. 



Elzerina blainvillii Gray, 1843, DlEFFENBACH's u Ne\v Zealand", II, p. 293. 



Verrucularia dichotoma v. Suhr, 1834, Flora, XVII. Jahrg., I. Bd, p. 725, PI. I, figs 9, a, b. 



Verrucularia dichotoma Busk, 1SS4, Challenger Report, Pt XXX, p. 48. 



Verrucularia dichotoma MacGillivray, 1887, "Cat. Mar. Pol. Victoria", Trans. R. Soc. Vict.i 



XXIII, pp. 189, 205 (Sep., 3, 19). 

 Verrucularia dichotoma MacGillivray, 1890, McCov's 'Trodr. Zool. Vict.", II, Dec. XX, 



p. 348, PI. 195, figs 6— ja. 

 Verrucularia dichotoma Whitelegge, 1890, "List Mar. F.-W. Fauna Port Jackson", J. Proc. 



R. Soc. N. S. Wales, XXIII, p. 123. 

 Farciminaria dichotoma Busk, 1S61, Quart. J. Mier. Sci., (N. S.), I, p. 155, PI. XXXV, 



figs 1 — 1 b. 

 Farciminaria blainvillii Hutton, 1891, "Rev. List Mar. Bry. X. Zealand", Trans. Proc. X. /.. 



Inst., XXIII, p. 104. 

 Flustrella dichotoma Hincks, 1884, Ann. Mag. Nat. Hist. (5) XIII, p. 366, PI. XIV, figs 2— 2b. 

 Flustrella dichotoma Hincks, 1893, Ibid-, (6) XII, p. 141. 



Torres Straits, A. C. Haddon Coll., Mus. Zool. Cambridge, Reg. Feb. 24, 1898; now trans- 

 ferred to the British Museum. 



Timor , Australasia (Lamouroux) ; Algoa Bay (v. Suhr) ; \ T ictoria (Busk: , Hincks , 

 MacGillivray); Port Jackson, Sydney (Whitelkgge and Mus. Zool. Cambr.) ; New Zealand 

 (Gray , Hutton). 



Zooecia constituting erect cylindrical branches, arranged in 4, 6 or more series, and 

 opening all round the branch. In 4-serial specimens the arrangement is Farcimznaria-like., the 

 branch being a 4-sided prism, each surface formed by one of the rows of zooecia. Most of the 

 free surface of the zooecia constituted by a frontal membrane, into which the parietal muscles 

 are inserted; the frontal membrane not extending to the proximal end, which is the "peduncle" 

 of Hincks (1884). Orifice resembling that of Flustrella hispida, but without a clistinct upper 

 lip. The lower lip is well marked, and lateral lips are indicated. Spines absent. 



The specimens described by Hincks were 6-serial. In colonies in the Cambridge Museum 

 which had formed part of Mr Hincks' collection I find this arrangement in most of the branches ; 

 but one branch is 4-serial. In a specimen from Port Jackson, in the same Museum, some of 

 the branches are also 6-serial ; but just before a bifurcation the branch may be widened and 

 flattened, as many as 5 rows appearing on each of the flat surfaces. But even in this colony 

 one of the branches is 4-serial. If thus appears that, although six rows are commonly present, 

 the number may be either greater or less. The Torres Straits specimen here described shows 

 an increase in the number of the rows to 8 in one place, just before a bifurcation. 



The diameter of the branch drawn (fig. 2) is 600 u.. The middle zooecium is 1030 u> 

 long, and its frontal membrane is 370 u. broad at its widest part. 



The present species has not been found in the 'Siboga' dredgings ; but I include it here 

 on the evidence of a single fragment obtained by Dr A. C. Haddon in Torres Straits. It belongs 

 to a series of species, of erect habit and with more or less cylindrical branches, which appear 

 to be characteristic of Southern waters. In addition to the species here described, this assemblage 



39 



