CESTODE AND NEMATODE PARASITES. 57 



Oceans. They belonged to the form enclosed in a bladder, e.g., T. efinaceus. They 

 are small, measuring '2 millims. by 1 millim., and the head is extremely minute and 

 rather coiled. We figure the cyst on Plate III., fig. 44. 



LUTJANUS ANNULARIS, P.locii and SCHN. 



Tetrarhynchus, sp. Cysts. 



A few small cysts of Tetrarhynchus were found in the tissues of this fish, one 

 of the Serranidse, but little could be made out of them. The same tissue contains 

 a number of oval, brown, glistening, granular-looking bodies, which may have been 

 a species of Sarcocystis. 



MYLIOBATIS MACULATA, Gray and Habdw. 



This common Eagle-ray is known m Tamil as " Panjadi " or " Panchadi tirikkai," 

 also " Neduvali tirrikai," or the long-tailed Ray, and in Sinhalese as " Panjadiya 

 maduwa." 



The food of this fish consists of Crustaceans (hermit crabs) and the feet of Molluscs, 

 chiefly Turbinella and Murex, also Strombus, whose opercula were found in the 

 stomach. 



Anthobothrium crispum, n. sp. Plate III., figs. 45 and 46. 



A few specimens of this species were taken from the intestine of Myliobatis 

 metadata. For Elasmobranch Cestodes they are large tapeworms, reaching a length 

 of 8 centims. or 9 centims. The head is 35 millims. in diameter. It is produced into 

 bothridia whose edges are much crumpled, frilled, fringed and subdivided. In some 

 cases the subdivision extends a good way towards the pedicel, and gives the head the 

 appearance of consisting of six or eight bothridia. The pedicels are very short and 

 the bothridia seem to be almost sessile. No myzorhynchus was visible. 



The neck is very long, and even quite posteriorly the proglottides show very little 

 demarcation. There is no indentation of any sort. The line which separates one 

 proglottis from its neighbour is usually clear and sharp in the centre, but it hardly 

 reaches the sides of the tapeworm. These latter are quite smooth, and, except that 

 the body slightly increases in thickness, they would be quite parallel. The neck is 

 about 07 millim. in width, the posterior part of the body I millim. in width. 



The specimens did not stain well, and all that could be made out was an L-shaped 

 structure, of which one arm represents the reproductive ducts running to the pore 

 and the other arm the uterus. The reproductive pores are irregularly alternate. 



This form is much more slender than the A. rugosum of Trygon walga and the 

 bothridia are less stalked. 



The diagnosis of Anthobothrium crispum is as follows : 



Length, 8 or 9 centims. Head with four fringed bothridia, somewhat sub-divided 



