1915] 



MacCallum: Ectoparasitic Trematodes 



399 



a 



b c d 



FIG. 134. CIRRI OF SEVERAL SPECIES OF DIPLECTANA 



seems to form part of the ejaculatory apparatus. The organ 

 itself is a hollow tube, much bent and composed of yellow chitin- 

 ous material (Fig. 134b). 



The female genital apparatus consists of a reniform ovary 

 situated about the middle of the body. The oviduct is short and 

 the genital junction is a short distance anterior to the ovary. 

 On the right side of the worm may be seen the opening of a 

 vagina which joins the seminal reservoir near the genital junc- 

 tion. 



The vitellaria are plentiful and extend on each side of the 

 body near the pharynx to a short distance anterior to the disc; 

 small vitelline ducts are sent almost horizontally to the genital 

 junction from each side. 



The uterus extends from the ootype near the genital junc- 

 tion to an atrium near the base of and to one side of the cirrus. 



Measurements of Diplectanum teuthis: 



Length 75 mm. 



Width 10 mm. 



Length of cirrus 04 mm. 



Diameter of disc 08 mm. 



Diplectanum lactophrys, nov. sp. 

 (Fig. 133) 



On February 19, 1915, there were found on the gills of a 

 cow fish, (Lactophrys tricornis), a colony of small Diplectana 



