HIGHER CRUSTACEA OF NEW YORK CITY 



^7Z 



Aegathoa loliginea llargcr 



A e g" a t h o a 1 o 1 i g i n e a Harger. Am. Jour. Sci. Ser. 3, 1878. 15 1376. 

 Harger. /. c. 1880. p. 393, pi. 10, lig.66. Richardson. /. c. 1901. p. 526. 



Front of head evenly rounded, eyes 

 \^\-\ large. Antennae 10 jointed. First 

 thoracic segTiient longer than others, 

 which are equal in length. Leg's armed 

 with strong- curved claws. Pleon long- 

 and large, uropoda slightly ciliated. 

 (The uropoda in the specimens taken 

 were Hke the right uropod in the figure.) 



Parasitic in the month of the squid 

 usually, but taken on bluefish in Great 

 South bay. 



Length 13 mm, breadth 3.6 mm. 

 Color in alcohol, yellow^ with minute 

 black spots. 



Fig. 43 Aeg-athoa loliginea 

 Hi 



(After Harger) 



Livoneca ovalis (Say) 



C y m o t h o a oralis Say, T. /. c. 1818. 1 1394. 

 Cymothoa triloba DeKay. /. c. 1844. p. 46, pl.io, lig.40. 

 Livoneca ovalis Verrill. I.e. 1874. P-572. Harger. /. c. 1880. p. 395. 

 Richardson. /. c. 1901. p. 531. 



A parasitic Isopod, with body broadly 

 oval and more or less distorted. Dorsal 

 surface moderately convex. Feet pressed 

 ckDsely to the body and concealed; the 

 first three pairs pointing forward, the 

 last four backward. 



They are found clinging to the roof 

 of the mouth or to the gills of fishes. 

 The bluefish is the usual host, but it 

 occurs on other forms, such as the scup. 



Length 15-22 mm, breadth 10-12 mm. 

 Color light with minute, short, dark 

 lines, which may be numerous enough 

 to give the animal a very deep color. 



Fig. 44 Livoneca ovalis 



