116 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



longer, slender, slightly curved spine; and close to it 

 there is another long spine, club-shaped at the base, and 

 sharply pointed at the apex. 



(c) Between these two groups of spines are other two, 

 each group consisting of three. One of these is rather 

 long and nearly straight, except for its sharply bent tip. 

 The base is swollen. The other two are slender, gently 

 curved spines. 



All these groups of spines are arranged along the 

 length of the proboscis with great regularity ; and between 

 each two of the consecutive groups (c) there is a very 

 small, slightly curved spine which lies nearly flat on the 

 surface of the proboscis. 



These characters correspond fairly well to those of 

 T. benedeni (Crety) as described by Vaullegeard, and I 

 identify the worm as this species. 

 The Proglottides. 



Segmentation is very obscure for some considerable 

 distance behind the scolex. In the single specimen 

 obtained none of the proglottides is mature. The terminal 

 one is represented in Text-fig. 3 (5) and it will be seen 

 that it has the characteristic structure of a T etrarhynchus 

 segment, resembling those of T. erinaceus very closely 

 except that it is relatively longer and narrower. It is in 

 the functional male phase, and the uterus is represented 

 only by a long narrow tube lying in the axial part of the 

 proglottis. The testicular follicles are very numerous, 

 and are rather small. The genital apertures are lateral 

 and may be situated on either side of the segment, there 

 being no definite order in, their alternation. 



3. Gyrocotyle urna, Grube and Wagener. 



Two specimens of this interesting Cestodarian were 

 found in the large intestine of a Chimera monstrosa, 



