PART III.] Echinorhynchus front Walls of Stomach of Pariah Dog. 541 



found that the most marked discrepancy exists, for all writers, as far as I am aware, 

 with the exception of Czernay,* appear to speak of them as confined to the walls of 

 the stomachf of the dog or wolf. This writer, however, has drawn attention to the 



* Bulletin de la Soc. Imp. des Naturalistes de Moscow, Tome xxxviii. 



f With regard to the statement made by writers generally, that the FUaria xanguinolenta is 

 principally found in the walls of the stomach, it may be remarked that on no occasion have I observed 

 any such occurrence in India. The only parasite with which I am acquainted, located in this situation, 

 is one which I am unable to refer to any described species. It is lodged in a tumour, generally of the size 

 of a small horse chestnut, continuous with the walls of the stomach. The tumour presents a hard fibrous 

 texture, and communicates with the interior of the stomach by a small orifice into which a portion of the 

 lining membrane of this viscus appears to be reflected. When cut into, two, or more, worms will be 

 seen coiled in a hollow in the centre of the tumour. 



These worms vary in length from fths of an inch to an inch, with an average diameter of about j^jth 

 of an inch. When placed under a microscope, the anterior half of the body is seen to be covered with 

 sharp spines; and rows of tsenia-like booklets (Fig. 35, 5) encircle the dome-shaped " head." The "head," or 

 rather proboscis, is frequently so completely retracted as to be altogether invisible (Fig. 35, 2). When 

 protruded, two prominent "lips" of complex conformation project beyond the globular "head," disposed 

 laterally, each being surmounted by a papilla permeated by a duct— not a nerve, as particles may 

 occasionally be observed to escape from these two papillae (Fig. 35, 3). 



The upper portion of the body is covered with chitinous spines, arranged like plates of armour, each 



Fig. 35. ECHINORHTNCHUS FBOM THE WALLS OP THE STOMACH OF A PARIAH BOG. 

 The parasite entire: proboscis exserted (Male) 

 Anterior portion of parasite ; proboscis retracted ... 

 Ditto ditto ditto exserted ... 



Posterior portion of parasite... 

 Hooks surrounding proboscis ... 



Prickly plates covering the anterior portion of the body 

 Small hooks arranged in rows on posterior portion of the body 



