IO = 



been for the account of the ovicells, which are said to be "shortly pyriform". Waters' figure 

 (PI. XXV, hg. 15) gives little indication of the remarkable elongation of the ovicell which is 

 so characteristic a feature of the Japanese specimens. 



Mr Waters : ) has just described, under the name of C. circinata, a species from Zanzibar 

 which he thinks may be identical with C. cuneata Mapl. It appears to me probable that this 

 form and those here recorded belong to the same species, as is shown particularly by the form 

 of the ovicell and of the ooeciostome. 



Measurements, in u. : — 



Diameter of orifices, 90 ('Siboga'); 120 (Japan); 



Distance apart of zooecia of the same side of the branch, 300 ('Siboga'); 240—400 (Japan); 



Width of branch, 145 — 200 ('Siboga'); 200 — 250 (Japan); 



Length of ovicell (projection from frontal surface of branch), 650 — 700 (Japan); 



Diameter of ovicell, 350 (Japan). 



o- 



Crisia kerguelensis Busk. (PI. VIII, figs 9 — 1 1). 



Crisia kerguelensis Busk, 1876, "Descr. Pol. Kerguelen's Island", Ann. Mag. Nat. Hist. (4) 



XVII, p. 117. 

 Crisia kerguelensis Busk, 1879, "Zool. Coll. Kerguelen's Land", "Pol.", Phil. Trans. CLXVIII, 



p. 197, PI. X, figs 17, 18. 

 Crisia kerguelensis Studer, 1879, "Fauna Kerguelensland", Arc'h. f. Naturg. Jahrg. XLV, Bd I, 



pp. 124, 133. 

 Crisia kerguelensis Studer, 1889, "Forschungsreise Gazelle", III Theil, pp. 140, 145, 158. 

 > Crisia eburnea, var. laxa Busk, 1886, Challenger Rep., L, p. 4, PI. II, figs 1, \a (Kerguelen). 



37. S. Stat. Jj. Borneo Bank, 3°27'S., ii7°36'E., 59Metres; fine grey coral-sand (fragments). 

 41Ó. K. Stat. 321. 6°S'.SS., U3°30'E., 82 Metres; fine grey mud (one fragment). 



Zoarium delicate, the branches narrow and the zooecia of the same pair in lateral contact 

 with one another on the frontal side of the internode. Lower internodes consisting of a single 

 zooecium, the number increasing from the proximal end of the colony and becoming fairly large 

 in the peripheral internodes. Internodes with an odd or even number of zooecia, a branch 

 commonly given off by the lowest zooecium, and another, on the opposite side of the branch, 

 from the second zooecium of that side. Basis rami very short, not nearly reaching the 

 preceding node or zooecium. Peristomes long, abruptly bent frontally at their base. Ovicell with 

 its inflated region entirely free and set at an acute angle to the surface of the branch ; the 

 ooeciostome near the distal end, on the side facing the fertile internode. 



One ovicell is present (tig. 11) on the specimen from Stat. jj. It agrees with those 

 described by Busk sufficiently well to make the determination probable. 



At the proximal end the present form has considerable resemblance to C. geniculata, a 

 species which C. kerguelensis was said to resemble by Busk. This is shown in fig. 9, where 

 the first five internodes consist each of a single zooecium. The next two internodes in the same 



1) Waters, A. W., 1914; see synonymj'. 



SIBOGA-EXrEDITIE XXVIII a. 1 A 



