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Zoarium delicate. Internodes consisting of one, two or three zooecia, giving off a branch 

 on one or both sides. Peristomes very long and delicate, not much less than half the length 

 of the entire zooecium. Ovicells wanting. 



The specimen described is from Torres Straits, and I have not found this species in the 

 'Siboga' Collection. In its zooecial characters it agrees closely vvith European specimens, except 

 that the peristomes are perhaps rather longer. In the absence of ovicells the determination 

 cannot be regarded as certain. 



By most authors C. geniculata lias been regarded as a form of C. cornuta. I have 

 attempted, in an earlier paper ! ), to show that this view is incorrect, and that the species is 

 characterised by the relations of the ovicell 2 ), which is not free distally but is adnate on its 

 basal surface to one or two zooecia. As no ovicells are present in the Torres Straits specimen 

 it is impossible to say whether the form here considered would have been found to agree with 

 European specimens in the characters of the ovicell. 



The zooecial characters are illustrated by fig. 12. The internodes commonly consist of a 

 single zooecium, though two zooecia may occur, and the internode at the upper end of the left 

 side of the figure has three, the largest number observed. An internode may give off one or 

 two lateral branches, in the latter case not quite at the same level, even in internodes consisting 

 of a single zooecium. The basis rami is short and does not reach the preceding joint. An 

 axial joint is formed in such a way as to leave the proximal part of the zooecium across which 

 the joint runs as a sort of basis rami which is situated in the anode between the two divereine 

 peristomes of the distal zooecia (where the internode consists of more than a single zooecium), 

 as shown in the lowest internode of the figure. The peristomes are of great length and are 

 curved both in a frontal and in a lateral direction. 



Measurements, in u. : — 



Length of zooecia, 700 — 950 ; 

 Width of zooecia, 50 — 60. 



Fam. Extalophoridae Reuss. 



Entalophoridea (pars), Reuss, 1869, "Pal. Stud. alt. Tertiarsch. Alpen"', II, Denkschr. k. Akad. 



Wiss. Wien, math.-naturw. CL, XXIX, p. 2S5. 

 Entalophoridae Pergens & Meunier, 1887, "Faune Bry. Garumniens Faxe", Ann. Soc. Roy. 



Malacol. Belg. XXI, Ann. 1886, p. 19 = 201. 

 Entalophoridae Gregory, 1896, "Cat. Foss. Bry. Brit. Mus.", "Jurassic. Bry.'', p. 137. 

 Pustuliporidae auctt. 

 Idtnoneidae (pars), auctt. 



Entalophora Lamx. 



Entalophora Lamouroux, 1821, "Exp. Méthod.", p. Si. 



Entalopliora Lamouroux, 1824, "Encycl. Méthod.", "Zooph.", p. 122. 



1) l. cit. 



2) Miss Robertson, t. cit., p. 234, desenbes a transverse septum passing across the ovicell in its proximal half, in this and 

 certain other species of Crisia. 



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