I20 REPORT OF NEW JERSEY STATE MUSEUM. 



mm. thick. Length, 5 mm. In my description given above, I 

 have largely followed the points giver by Wilson in his exhaus- 

 tive account of the species.^ My examples, eight in number, were 

 all taken from the caudal fin, belly and hind portion of the body 

 of an example of Eulamia niilberti secured at Corson's Inlet, 

 September, 1910, by Dr. R. J. Phillips These parasites were all 

 females, and were' found clinging tenaciously to their host, which 

 after being placed in alcohol were easily removed. Where each 

 one was attached a small swelling was noticed on the host. 



Sub-Famly Caugin.i;. 



Carapace broad, always flattened dorso-ventrally. Free thorax 

 segment without plates or appendages of any sort except fourth 

 pair of legs. Genital segment enlarged, but usually smaller than 

 carapace, and seldom much larger. First and fourth thoracic 

 legs uniramose, second and third biramose, fifth pair rudimen- 

 tary, but often visible as pair of small papillae at hind corners of 

 genital segment. Adults active, most of females, as well as 

 males, capable of swimming about freely. 



Key to the genera. 



a. Frontal plates without lunules ; second maxillae bifurcate or simple ; genital 

 segment simple, without plates or processes. lepEophtheirus 



aa. Frontal plates with lunules ; second maxillae simple, spine-like ; genital 

 segment usually smaller, never much larger than carapace, and flattened. 



CALIGUS 



Genus LEPEOPHTHEIRUS Nordmann. 



Lepeophtheirus Nordmann, Mikrog. Beitr., II, 1832, p. 30. Type Lerncca pec- 



foralis Miiller, monotypic. 

 Pupulina Van Beneden, Bull. Acad. Roy. Belg., (3) XXIV, 1892. p. 254. Type 



Pupulina Aores Van Beneden, monotypic. 



Carapace large, shield-shaped. Basal joints of first antennae 

 without sucking-disks characteristic of Caligus, and terminal 

 joints free. MandiVjles toothed only on inner margins. Second 



' Proc. U. S. Nat. Mus., XXXIII, 1908, p. 354. 



