472 



MICHAEL F, GUYER, 



The second speciraen is tlie ono whicli bears the heacl *). The 

 total length is 5.2 m and the whole number of proglottids, about 775. 

 The proglottids extend quite up to the head and uo special, unseg- 

 niented neck region is present. The first few are broader than long 

 but change after about the twelfth. The following table gives the 

 measurements of the various parts of the body. 



Head to 50 cm, number of proglottids 290, the last 3.2 mm long by 4.6 wide 



. „ 7 „ 



„ 8.2 „ 



., 9 „ 



„ 10 „ 



, „ 7.8 „ 



, „ 7 „ 



, „ 5.4 „ 



, „ 4.8 „ 



In general contour the proglottids havo soniewhat the shape of 

 a flattened cylinder, with the exception of some near the anterior 

 end, and the ones immediately following the sexually mature. The 

 former in many cases show considerable tendency to taper toward the 

 head, and in the later, where the branching of the uterus is well 



1) A description of this structure has been purposely oinitted for 

 reasons given elsewhere (Ward, 1897 a) from whicli the following re- 

 marks are quoted: 



"The head wliich was attached to the one specimen of T. confusa 

 was cut off and after having been stained was mounted in baisam in 

 the ordinary manner. There was, furthermore, a label accompanying 

 the specimen throughont the entire series of transfers and it is difti- 

 cult for me to believe that it could have been confused with any other 

 specimen, especially since to my knowledge there were no other tape- 

 worms on the table at the same time. . . . It has not escaped any who 

 have examined the figure and description that there exists between the 

 head as described and that of Dipylidium a great similarity. . . How- 

 ever, the general form appeared to us remarkable on first study, and 

 I am able to say positively, from having studied the head und er a 

 lens when still attached to the entire chain, that the head of T. con- 

 fusa was remarkably small, approximately of this same size and shapo, 

 and that there was within the head and beneath the apex, a dark ob- 

 ject corresponding to the general position of the inverted rostelbim 

 with hooks, which was figured from the specimen as mounted and now 



in my possession But since a confusion may possibly have 



arisen and since I do not wish to prejudice the work of my student 

 by allowing him to incorporate in it any dnubtful pai'ticulars, I have 

 Lad him complete bis paper omitting an 3^ reference to the structure of 

 the head." 



