18' 



I found two as figured in the eye of one Sprat. The neck 

 is not only long, so as to penetrate deep, but notched to 

 secure it, in addition to the barbs on the sides of the head. 

 It does not seem to have any eyes, but has a mouth appa- 

 rently formed for sucking, rather large, and under the 

 head. 



The peculiar worm added to the plate was found on an 

 oyster-shell, and is therefore figured as a curiosity. We 

 think of describing it with others that we may hereafter 

 meet with. 



