74 Zoological Society : — 



the two suckers in the form of an elevated papilla. Length from 6 to 8 

 lines, greatest breadth 1^ line. 



Hub. Stomach of the Spinous Shark, Acanthias vulgaris^ from 

 Falmouth Harbour. Brit. Mus. 



Order Cestoidea. 

 Genus Tetrarhynchus. 



1. Tetrarhynchus rugosus. 



Tetrarhynchus ruyosus, Baird, Cat. Entoz. Brit. Mus. 69, t. 2. f. 3. 



Body flattish, thick, exceedingly rugose, almost tuberculated, the 

 rugae extending right across the body, which is of a white colour. 

 Head conical, thicker than the body and about one-fifth the length 

 of it. Bothria inversely heart-shaped (the broader part being at the 

 lower margin), deep, divided at the bottom by a narrow septum ; 

 edges thick and raised. Proboscides round and club-shaped at their 

 tips. Inferior extremity of body, as it were, truncate. Total length 

 (in spirits) 10^ lines, breadth of head 2\ hues, of lower part of body 

 3 lines, bothria 2 lines in length. 



In one specimen the head is much broader than the inferior extre- 

 mity of the body, being about 3 lines broad, while the inferior extre- 

 mity is only 2 lines and is terminated by a heart-shaped appendage 

 of about 1^ line long and of a light rose colour (the male?). 



Hah. Taken alive from the lower intestine of a salmon. Brit. 

 Mus. 



2. Tetrarhynchus strangulatus. 



Tetrarhynchus strangulatus^ Baird, Cat. Entoz. Brit. Mus. 69, 

 tab. 2. f. 4. 



Body flat, of a Hght yellowish colour, thickish, elegantly and mi- 

 nutely striated across and marked with slight longitudinal sulci, which 

 run the whole length of the body. The head is narrower than the 

 portion of the body which immediately succeeds it, is about 4 lines 

 in length, longitudinally sulcated on the sides, smooth on the two 

 faces, and distinctly separated from the body by a contraction 

 which gives the appearance, as it were, of a shoulder to the com- 

 mencement of the body. The bothria are shallow, oval-shaped and 

 divided at the bottom by a septum, which, at about the half of its 

 length, divides into two portions; the edges are raised and thickened. 

 Proboscides short and stout ; the inferior part of the body terminates 

 in a blunt conical papilla. Length from 1^ to 2| inches ; breadth 

 from 2 to 3|^ lines. 



Hab, ? From Chusan. Brit. Mus. 



Genus T^nia. 

 1. T^.nia Bremseri. 



Tcenia Bremseri, Baird, Cat. Entoz. Brit. Mus. 73, t. 2. f. .5. 



Head of a moderate size, surrounded with a double crown composed 

 of upwards of twenty small hooks ; neck very short. Articulations 

 of body numerous, at first very small and nearly oblong, gradually 



