REPTILIAN TAPEWORMS, 257 



no details or figures are given. Dr. Zschokke has not given 

 any figures of transverse sections thi-ongh tliese pores, which 

 are represented in his drawings of them in full face as rather 

 slit-like, and thus suggestive of a tear due to the pressure of eggs. 

 There has been some criticism of the conclusions which I have 

 just briefly abstracted. 



Pintner, criticising* these statements as embodied in an 

 earlier paper f of a preliminary nature, definitely denies their 

 truth. " Fiir sammtliche mir bekannte Arten," he writes, " der 

 Gattung Calliohothriuin, fiir Anthohothrium rmisteli, fiir Fhyllo- 

 hothrium gracile, fiir Echeneibothrium und noch fiir manche andere 

 von mir untersuchte Tetrabothrien, trifi^t das ganz entschieden 

 nicht t zn." Pintner goes on to observe (and his remarks are 

 given by Brann) that a definite slit is formed on the ventral 

 surface of the proglottid shaped' like a " gothic door," out of 

 which the eggs pour. This is an artefact due to the internal 

 pressure of the swollen uterus, which lies nearer to the ventral 

 than to the dorsal surface. This slit can be recognised in carefully 

 handled proglottids as a median line. Doubtless, this latter 

 may be a vestige of the uterine opening of the Pseudophyllidea ; 

 but that there is no actual natural pore Pintner is satisfied. 



The existence of uterine pores has also been dealt with by 

 Kraemer§, and in forms more nearly allied to Ophidotcenia and 

 Solenotasnia, viz, in Ichthyotce/iiia itself. For to this genvis (at any 

 rate seiisio lato) we are, I believe, to refer Tcenia filicollis, 

 T. ocellata, and T. torulosa, the anatomy of which is described by 

 . Kraemer. Of the first-named species the author remarks that 

 the eggs are divided by a break in the body-wall, that is to say, 

 through a secondarily appearing uterine opening, which is 

 illustrated by a figure || very like those given by Zschokke and 

 referred to above. A more elaborate account is given of " Ttenia " 

 tortdosa. But the secondarily formed slit appears to be formed 

 in the same way as that of the other species, and no suggestion is 

 made that it is in any way a permanent structure, or even a last 

 vestige of the real uterine pore of the Bothriocephalids, Kraemer 

 investigated the slit-like pore by means of sections, and traced it 

 into continuity with the cavity of the uterus, observing (if I 

 understand him rightly) that there is no difiference in form which 

 would imply a differentiated duct. 



Prof. Braun does not accept the views of Zschokke with 

 reference to a uterine pore % in Ccdliohothrmm, etc., and in the 



* " Neue Untevsuchungeu iiberden Ban des Baudwurmkovpers," Arb. Zool.Iiist. 

 Wien, viii. 1889, p. 6 (of memoir) footnote. 



t " Studien liber den aiiatomisclien und histologischen Bau der Cestodeu," 

 Centralbl. Bakt. u. Paras. Bd. i. 



X Italics, author's. 



§ " Beitrage zur Anatomie und Histologic der Cestoden der Siisswasserfische," 

 Zeitschr. wiss. Zool. liii. 1892, p. 617. 



II Loc. eit. Taf. xxviii. fig. 42. 

 ^ Brouu's Klassen und Ordnungen des Tliierreiclis, Bd. iv. Abtli. 1 B, p. 1411. 



