1018 MISS R. HARRISON AND PROF. S. J. HICKSON ON 



general form of tlie body and the segmentation is not inilike in 

 the two genera ; and especially to be noted is a resemblance in 

 the scolex. In the present genns as in the Oochoristica from 

 Tamandua tetradacti/ki, described by myself* some months since, 

 the strobila, as it were, invade the scolex. On the other hand, the 

 earh/ disappearance of the uterus and the imbedding of the ova 

 singly in the medullary parenchyma is a character of Oochoristica 

 which distinguishes it from the genus which I propose to call 

 Anoplokenia. The peculiar cirrus sac and the very complex 

 genital cloaca are points in which Aiioplotceida differs from all the 

 genera with which I here compare it. 



There now remains the genus Tceniia (sensu stricto) to which the 

 present species shows a certain amount of likeness in the uterus, 

 which is rather pronounced in certain proglottids. There is in 

 fact occasionally a quite distinct median .stem with branches. 

 Tcenia, however, has an armed rostellum which is sometimes not 

 armed as in T. {Tmiiiarhynchus^ saginata, where the hooks drop out 

 early and ai'e replaced by a sucker-like structure!'. There is 

 nothing of this kind in the present species, which moreover bears 

 no such close likeness to Tcenia saginata as would warrant its 

 inclusion in the same genus or subgenus. Another genus in 

 which the uterus has a marked median stem and lateral branches 

 is CatenotcB7tia,t the species of which occur in the mouse and in 

 the squiiTel. In this genus, however, the testes and ovaries have 

 a, different position from that which is met with in the tapeworm 

 dealt with in the present memoir, and the relation of the genital 

 duct to the exci-etory tubes is also different. 



46. Some Madreporaria from the Persian Grulf. By Huth 

 Haerison, Oxford §. With a Note on the Memoir and 

 some Further Notes on PyropliyJlia iuflata by Sydney 

 J. HicKsoN, M.A., D.Sc., F.R.S., F.Z.S. 



[Received May 19, 1911 : Read June 27, 1911.] 



(Plates LVII. & LYIII. )! and Text-figures 216-221). 



This collection of Madreporarian corals was made by Mr. F. W. 

 Townsend, and entrusted to me for identification and description 

 by Professor Hickson. I should like to take this opportunity of 

 tlianking Professor Hickson for putting this interesting piece of 

 work in my hands. My thanks are also due to Pi'ofessor Bourne 

 for allowing me to carry on the work in his laboratory and placing 

 all its resources at my disposal, and for help and advice during the 



* P. Z. S. 1911, p. 627. I ought to have nientioned in that paper that something 

 of the same kind appears to occur in O. rostellata (see Zsehokke, Zeitschr. wiss. 

 Zool. vol. Ixxxiii. 1905). 



t Cf. Bronn's " Thierreich," Vol. iv. Ahth. 15. p. 1720. 



X Janicki, Zeits&hr. wiss. Zool. 1906, vol. Ixxxi. p. 505. 



§ Communicated by Prof. S. J. Hickson, F.K.S., F.Z.S. 



II For explanation of the Plates see p. 1044. 



