46 ON TBEMATODE PAEASITES EKOM BOLPHINS. 



March 1873. In this case there does not appear to have been 

 more than one parasite present in the intestine. There is cer- 

 tainly something very peculiar about the head and neck of this 

 fluke ; but assuming that it was not in any way injured before the 

 drawing was executed, I offer provisionally for its recognition the 

 fullowiuo: nomenclature and characters. 



DiSTOMA Andersoni, n. sp. Body oblong, smooth externally, uni- 

 form in thickness, six times as long as broad ; head with lateral pro- 

 jections ; ventral sucker large and prominent; neck much constricted ; 

 tail evenly rounded off, blunt. Length |", breadth about ■^". 



In addition to the above-mentioned characters, the drawing 

 shows that the testes are globular and placed high up in the middle 

 line of the body. The small lobed gland immediately above them 

 is probably the ovary. The clear narrow line extending from the 

 border of the lower testis to the end of the tail seems to mark 

 the limit of the viteUigene organs on either side below. These 

 glands in all likelihood extend upwards to the neck, being appa- 

 rently very largely developed in this species. 



EXPLANATION OF PLATE X. 



Fig. 1. JDistoma lancea, X 70 diameters. 



2. D. cam^pula (^ = Campula oblong a, Cobbold), X 50 diam. (The small 



letters refer to the same parts in these two different species.) a, oral 

 sucker; h, ventral sucker; c, reproductive papilla; d, oesophageal 

 bulb ; e, oesophagus ; /, intestinal tube ; g, csecal end of the same ; 

 h, testes ; i, ovary ; Tc, vitelligene gland ; I, uterine canal ; m, trunk of 

 the water system. 



3. D. Andersoni, X 28 diam. a, oral sucker ; b, lateral prominence of the 



head ; c, ventral sucker ; d, neck ; e, oesophageal bulb ; //, body ; 

 g, ovary ; h, testes ; i, central clear line ; Ic Jc, vitelhgene gland of 

 one side ; I, water-vascular outlet. 



