A New Species of Trematode ly 



in the painted terrapin it will be seen that it conforms to Llihe's 

 genus Telorchis in the following points: both testes lie, one 

 behind the other, in the median line, at the posterior end of the 

 body ; the cirrus pouch is long and has its opening anterior to the 

 ventral sucker and removed more or less to the left; the ovary 

 lies in the same relative position in the body; the ovary is sepa- 

 rated from the testes by the mass of greatly coiled uterus, all of. 

 which lies in this position, in no case extending posterior to the 

 anterior testis; the yolk-glands with their many follicles fill the 

 sides of the body " sich dem Vorder- und Hinterende des Thieres 

 mehr oder weniger weit nahernd " ; it possesses intestinal caeca 

 which reach to the posterior end; the excretory system forks just 

 posterior to the ovary, thus becoming Y-shaped; and the acetab- 

 ulum is slightly smaller than the oral sucker. 



Looss describes the genus Telorchis as being either armed or 

 unarmed ("Haut mit Stacheln bewaffnet oder glatt (?)") and 

 he also describes the cirrus pouch as extending posterior to the 

 acetabulum as far as the ovary. He mentions, in addition, the 

 presence of the following organs : a pharynx, short esophagus, 

 Laurer's canal, and a receptaculum seminis. All of these organs 

 are present in my specimens. From this comparative study it is 

 evident that the trematode which I have described conforms to 

 the descriptions of both Liihe and Looss of the genus Telorchis 

 and should be placed in that genus. 



There is however one marked and important variation, in the 

 form which I have described, from the descriptions of the genus 

 Telorchis as given both by Liihe and Looss. This is the position 

 of the cirrus pouch which in my specimens never extends poste- 

 rior to the acetabulum and consequently also the position of the 

 genital pore which is on the dorsal surface, far anterior and to the 

 extreme left of the acetabulum. 



These differences will be considered more fully a little later in 

 the discussion. 



Liihe (1899: 529) in his description of T. clava, says: 



" Die grosste anatomische Diflferenz, welche sich innerhalb der Gattung 

 findet, betriflft den Oesophagus, welcher bei T. clava (Dies.) vollstandig 

 fehlt, bei T. nematoides (Miihl.) dagegen sogar recht lang ist. Diese 



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