REPTILIAN TAPEWORMS. 253 



A salient character of the uterus of this genus Solenotcenia is 

 afibrdecl by the diverticula. This character is shared by Ophido- 

 toenia, and the diverticula appear to me to be quite similar in 

 both of these genera of Ichthyotaeniidse. The peculiarity of 

 these diverticula is, first of all, their clear separation from the 

 uterine stem into which they open, often by a very narrow mouth, 

 and, secondly, the delicate long-stalked glandular cells which beset 

 them externally (text-fig. 51). As I have already pointed out in 

 the case of Ophidotcenia. these cells seem to be exactly like those 

 of the shell-gland in other tapeworms, and I can here say the 

 same of those of Solenotcenia. It appeared to me to be right in 

 the case of the allied form Ophidotcenia naice * to correlate the 



Text-fig. 51. 



* # 



■V 



'•>n. 



^i^ ^■■'■' 



I ^ 



A transverse section of one of the uterine diverticula of Solenotcenia viperis highly 

 magnified to show the long-stalked glandular cells which form the greater 

 part of its walls. 



presence of these cells, distinguishing the diverticula of the 

 uterus of this genus from those of Iclithyotcenia, with the absence 

 of a well-marked shell-gland, which is very conspicuous in many 

 species of Ichthyotcenm. I find, however, in Solenotcenia viperis 

 a short thick-walled region of the oviducal apparatus, which I 

 take to be the equivalent of the shell -gland. This is far less 

 conspicuous than the shell-gland of Ichthyotcenia, whei-e I have 

 seen it ; and the cells are not stalked, and have thus not the 

 characteristic appearance so well known in Cestodes. 



In less fully mature proglottids, where there is no ventral 

 groove upon the ventral face of the body, the uterus is a simple 



* P. Z. S. 1913, p. 33. 



