1913.] T. SouTHWEivL : Parasites from Fish. loi 



specimen of fish in which were found specimens of Ophryocotyle 

 bengalensis , n. sp. and Bothriocephahis {Anchistrocephalus) polyptera 

 (Leyd.). They measured 9 mm. long and were club-shaped. The 

 breadth at the posterior is 2-5 mm. and at the anterior extremity 

 I mm. The oral sucker is '6 mm. in diameter. The ventral 

 sucker is situated 4 mm. from the anterior extremity and has a 

 diameter of -85 mm. The pharynx is small and no oesophagus is 

 present. The two rami of the intestine are sinuous, terminating 

 blindly at the posterior extremity. The inwardly directed loop 

 of one ramus of the intestine is situated opposite to the laterally 

 directed loop of the other ramus. Reproductive organs were not 

 developed. It is impossible at present to identify this immature 

 form, but it bears a strong resemblance to the immature 

 form of Isoparorchis trisiinilitubis , n. sp., obtained from the 

 muscles of the Mahseer {Barbus tor) and already described. 



Anaporrhutum largum, Liihe. (5) 



This Trematode was first obtained by Prof. Herdman in 

 Ceylon from the coelom of Rhirwptera javanica. He only obtained 

 a single specimen. Large numbers of this species have since 

 been obtained by Southwell in Ceylon, from the coelom of Chilos- 

 cylliiim indicum, Giiiglyjjiostoma concolor and Aetobatis narinari. 



A species of Anaporrhutum was also obtained by Dr. Jenkins 

 from the coelom of Stegostoma tigrina, caught off the Orissa coast 

 on December 15th, 1910. 



It differed from the Ceylon specimens of this species in the 

 following points : — 



Orissa specimens. Ceylon specimens, 



{a) Leaf-like in outline. {a) More circular in outline. 



{b) Internal wall ot the gut {b) Ridges not well marked. 



thrown into steep 



ridges. 



Besides the preceding points the testes and vitteline glands in the 

 specimens collected by Dr. Jenkins were but feebh^ developed. 

 At first, this seemed a striking difference, but I am inclined to think 

 that the species are the same in spite of the differences named. 



The three species of Anaporrhutum^ viz. A. largum, A. albidum 

 and A. richiardii, appear to be widely distributed amongst 

 Klasmobranchs in Indian waters. 



Anaporrhutum albidum, Ofenh. 



Large numbers of this Trematode were obtained in 1911 from 

 the surface of the liver of a Chiloscyllium indicum, caught on the 

 Ceylon Pearl Banks. They differed from Ofenheim's description 

 and figure (7) in (i) having the ventral sucker much larger than 

 in Ofenheim's specimens and (ii) in having the testes less scattered. 

 This latter fact may, however, be due to the testes not being 



