368 LEWIS HKNRY GOUGH. 



them as occui'ring in Stilesia centripunctata (Rivolta) 

 and Anoplocephala magna (Abilgaard), (Gough, 1909). 

 I have recently also observed similar cells in Taenia, only 

 in Ttenia they are smaller than in Anoplocephala or 

 Avitellina^ agreeing in this respect with the other scolex 

 ganglion cells. Recently, similar cells have been observed 

 by Spiitlich (1909), in the bothi-idia of Tetrabot lirium 

 laccocephalus and T. macrocephalu s ; he describes 

 them as being large cells with granular plasma, which stains 

 deeply with hasmatoxylin, and with a large nucleus in which 

 several large chromatin masses are visible. These colls have 

 branched processes and form a reticulation between the 

 muscle-fibres by the anastomosing of the processes. These 

 branched cells are more or less restricted to the middle of 

 the bothridia, keeping distance from either surface. Spatlich 

 thought that they might be glands, but states that his material 

 was not sufficiently well preserved to allow definite con- 

 clusions. 



It is strange that nobody has yet looked for ganglion cells 

 in the suckers, as they could be expected to exist in order to 

 control the working of those complicated muscular organs. 



The Genital Organs. Figs. 1-4 and 41-65 ; Text-tig. 2. 



When the genital organs are in full activity, the recep- 

 taculum serainis is filled Avith spermatozoa and the oocytes 

 are passing from the ovarium into the uterus; the genital 

 organs are disposed as shown on Text-fig. 2 or fig. 1. The 

 position of the cirrus pouch to the vagina is extremely 

 variable, as shown on fig. 43 ; it can lie anterior or posterioi", 

 dorsal or ventral to the vagina. The figure shows a sagittal 

 section through about nine sections, passing through four 

 cirri and vagintc ; it will be seen that the utmost possible 

 irregularity has been realised. 



The vagina leads into the spermiduct, which shortly after 

 having crossed the ventral canal widens and forins the pear- 

 shaped receptaculum seminis (Text-fig. 2) ; from the wider 



