382 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



George's Banks !, and east of Banquereau!, or Quereau, latitude 40° 36' 

 north, longitude 57° 12' west, where seven fine specimens were taken 

 from a halibut {Hippoglossus), June 2, 1879, by Capt. J. W. Collins. It 

 appears to replace the preceding species at the north. 



Specimens examined. 



X.— ^GID^. 



Front formed of the approximate basal segments of the antennulae, 

 which are not covered by an anterior i) rejection of the head ; antennulse 

 and antennfe presenting an evident distinction into peduncular and 

 flagellar segments; maxillipeds operculiform ; mandibles formed for 

 piercing, palpigerous, mouth suctorial ; first three pairs of legs ancoral, 

 last four ambulatory ; epimera distinct behind the first thoracic segment; 

 uropods lateral, biramous, ciliated, and flattened. 



This family was represented within our limits by a single species of 

 the typical genus until the summer of 1879, when a single specimen was 

 collected of a second genus belonging to the ^gldce, but having evident 

 relations with the next family, and in many characters intermediate be- 

 tween ^ga aud the Gymofhoidcv. The two genera by which the family 

 is at present represented on our coast may be further characterized as 

 follows : Both the antennuloB and the antennfe are directed laterally, the 

 former arising near together on the anterior margin of the head and 

 forming part of the outline of the animal as seen from above. The}", 

 as well as the antennae, present an evident distinction into peduncular 

 and flagellar segments. The maxillipeds are operculitbrm, and have 

 the palpus armed with short hooks for adhesion to the surface of the 

 fish on which they may be feeding. The mandibles are armed with a 

 horny point, but not toothed as in the Cirolanidm, and, while fitted for 

 piercing, are not cajjable of lacerating and biting off pieces of flesh as in 

 that family. 



The first three pairs of legs are ancoral, or armed with strong curved 

 dactyli, which, once imijlauted iu the body of a victim, retain their hold 

 without effort — a structure which attains its fuUest development in the 



