I IO 



directed somewhat frontally, with a distinct angle at its junction with the ovicell. The ooeciopore 

 is transversely elongated and it is bounded by fairly distinct lips. 



The ovicells of the specimens referred to the present species differ from one another; 

 luit this appears to depend largely on the nature of the growth of the fertÜe branch. In another 

 specimen (239. A. 1 ) from the same Station the ovicell is developed from a short thick branch, 

 which shows only a slight indication of bifurcating in the region of the ovicell, which is thus 

 considerably wider at its distal end than in the specimen shown in fig. 1 2 (the ovicell having 

 shared in the general widening of the branch which has taken place in this region). The 

 ooeciostome has, however, the same terminal position, although it is not quite so well developed 

 as in the branch figured. 



In the specimens from Queensland three ovicells are present, all of a more elongated 

 type than in fig. 12. One of these begins at a bifurcation and extends for some distance up 

 the inner side of one of the branches so formed. The branch in question is a slender one, and 

 the ovicell is correspondingly narrow. The other two ovicells begin before the bifurcation and 

 extend along one of the branches. In one of them the ovicell is on the side of the branch 

 facing the other branch, and is accordingly seen in side view with the bifurcation in the plane 

 of the slide. The other ovicell is quite similar, except that it is seen in frontal view with the 

 bifurcation in the same position. In all these cases the ooeciostome is terminal and is set at an 

 angle to the rest of the ovicell. 



The other specimens recorded above have no ovicells ; but, from their zooecial characters, 

 329. A. and the specimen from Torres Straits may be placed with the present species with 

 some confidence-, while 251.H. 1 is probably correctly determined and 449. B. — a fragment in 

 poor condition — is doubtful. Two specimens dredged by the 'Challenger' off the Marion Islands, 

 in the Cambridge Collection, and referred to E. proboscidioides, have some resemblance to the 

 'Siboga' specimens ; but their sterns are more regularly cylindrical ; and in the absence of ovicells 

 it would be unsafe to assume that they belong to the present species. 



Measurements, in <j. : 



Width of branch, at lower end of fig. 12, 850 ; 



Length of longest peristome, fig. 12, 1,400; diameter, 220 — 250; 



Length of ovicell, fig. 12, 2,280; 



Width of ovicell, at proximal end, fig. 12, 780; 



Width of ooeciostome, fig. 12, 250 ; 



Diameter of orifices, fig. 12, 150 — 200. 



Gregory (t. cit., p. 222) gives the diameter of the orifices of a recent specimen from 

 Naples as 210 u.. 



2. Entalophora delicatula Busk. (PI. X, fig. 11). 



Pustulopora delicatula Busk, 1S75, -'Cat. Mar. Pol. Brit. Mus.", III, p. 20, Tl. VLB, fig. 3 

 (Queensland). 

 ? Pustulipora delicatula Haswell, 1SS0, "Pol. Queensland", 1'roc. Linn. Soc. N. S. Wales, V, p. 35. 



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