Microcotyle macroura n. sp. 



, Several examples of this species were found clinging- to tlie 

 gills of tlie striped bass (Roccus lineatus). 



The worm is large and stout, measuring 1,2—1,5 cm in lengtli 

 and 2—3 mm in breadtli (Fig. C). It is somewhat lancet shaped 

 with a broad leaf like caudal sucker bearing appendage which may 

 project straight in the long axis of the worm or be twisted from 

 side to side. It is, however, ordiuarily to be regarded as a con- 

 tinuation in the long axis of the worm and does not appear, as in 

 sorae species, as a tiansversely placed foot. 



The suckers vary in number; in two of the larger specimens 

 there are fifty while a somewhat smaller example has only forty. 

 This variability is recognised in other forms and it seems quite 

 possible that the number increases with the age of the worm. The 

 suckers which have a skeletal framework of chitinous rods vary in 

 size also; starting at the root of the suckiug foot, they are small 

 but gradually they become very large along the sides only to 



