642 



THE LERN^EA. 



Fig. C shows the Cecrops, a creature that is found upon the sunfish, and adheres 



to the gills. It is not always fixed to this habitation, but floats about by thousands 



in the Mediterranean, where it is preyed upon by many fishes. 



Fig. D shows the female of the 

 SHARK-SUCKER, a species that is 

 found adherent to the eyes of the 

 Arctic shark, and appears to blind 

 it. The sharks to which this un- 

 pleasant appendage was attached 

 seemed to be quite destitute of 

 sight, and did not flinch in the 

 least when a blow with a lance 

 was aimed at them. The arm- 

 like appendages of this creature 

 are inserted into the corner of the 

 eye for nearly one-fourth of their 

 length. This parasite attains to 

 the length of three inches. Fig. E 

 represents the male of the same 

 species. Fig. F is the male of an 

 allied species found on one of the 

 common dog-fishes known by the 

 name of tope, and described on 

 page 208 of this volume. Fig. G 

 is the female of the same species. 

 At fig. H is seen a strange elon- 

 gated creature called Pcnellajilosa 

 from its extreme length. This 

 species is found to penetrate into 

 the flesh of the sword-fish, the 

 tunny, and the mole-fish, all of 

 which have been described in this 

 volume. It is said to cause them 

 considerable pain. At fig. I is 

 seen a parasite of even stranger 

 form, but belonging to the same 

 genus. This is Penella sagittata. 

 At fig. K is shown the head of 

 the sprat, having one of these 

 parasites, called the SPRAT-SUCKER, 

 affixed to its eye. Sometimes 

 this creature is tolerably common, 

 many specimens being obtainable 



A. Chalimus scombri. at a single fishmonger's shop, 



B. Chalimus scombri. Attached to a Caligus.) while for several years hardly one 



C. Cecrops Latreillii. D. Lernsedpoda elongdta. (Female.) w jH fog seen. The color of this 



E. Lernaedpoda elongata. (Male.) F. Lernse6poda galei. (Male.) parasite is pale sea-green with a 

 G. Lernaeopeda galei. (Female.) H. Penella fllosa. slight bluish cast. The eggs are 



I. Penella sagittata. K. Lern4ntoma spratti. (Natural size.) n A magnified figure o f 



L. Lernentoma spratti. (Magnified.) thij rrMhirp U sppn at fi<r T 



T . . . vr T /n -it r ja i. t inis creature is seen at rig. .L., 



M. Lernaeocera cvpnnacea. N. Lernsea. (From gill of codfish.) , . , ' 



and is given in order to show the 

 O. Lernsea gobma. P. Lernsea radiata. , ... & , , , . . , . 



barb-like head by which it adheres 



to the eye of its victim. 



At fig. M is shown a strange and seemingly shapeless parasite that is found to affix 

 itself to the carp tribe, and at N a creature of somewhat similar form is notable for being 

 found upon the gills of the codfish. This creature belongs to the typical genus. At 



