554 



DR. F, E. BEDDARD ON 



einzelne ein oder mehrere Eier einschliessende Siickchen auf." 

 These definitions are, as I presume, chiefly based upon the many 

 observations made upon the best-known species of the genus, 

 viz. Dipylidium caninum {=.Tainia cucitmerina, mult, auct.), 

 of which they are a correct restatement. But Fuhrmann has 

 himself described in an Avian Dipylidium * a series of sinuous 

 uterine tubes preceding a series of egg-capsules each containing a 

 single egg. Furthermore, although he gives no details, Diamare t 

 asserts that the development of the uterus in other species is as 

 in D. caninum. 



Text-fie-. 87. 



Dipi/lidium dongolense. 

 A portion of the section represented in text-fig. 86, more highly magnified 

 to illustrate the absence of a special lining membrane to the egg-holding spaces. 

 Lettering as in text-fig. 86. 



In the species of which the present paper is an account I can 

 find no confirmation of Diamare's statement concerning the de- 

 velopment of the uterus, though his figures of the completely 

 mature uterus of D. trinchesii and D. pasqualii agree very closely 

 with what I have seen in mature proglottids of D. dongolense (see 

 text-fig. 86). In the largest specimen which I have been able to 

 examine, in which the last nine proglottids were elongated, it was 

 only the last two which agreed really closely with the figures given 

 by Diamare and just referi'ed to. In these alone the embryos were 

 contained each in its own separate compartment, which it did not 

 by any means fill. I lay particular stress upon the fact that they 



* " Taenien der Raubvogel," CB. Bait. n. Paras, xli. 1906. 

 ■\ " II geuere Dipi/lidium," Atti R. Ace. Napoli (2) vi. 1894. 



