202 REPORT OF NEW JERSEY STATE MUSEUM. 



pair of maxillae with masticatory lobe coarsely spinous at tip, 

 basal lobe small unisetose, palp of moderate size, and terminal 

 joint slightly expanded. Second pair of maxillae with outer lobe 

 much larger than inner. Maxillipeds with masticatory lobes 

 large and dentate inside, palp comparatively short. Gnathopoda 

 distinctly subcheliform, in female not very strong and in male 

 much more powerful, especially posterior ones, but otherwise of 

 same structure as in female. Perseopoda rather stout, three 

 posterior pairs successively increasing in length, and with pro- 

 podal joint simple, basal joint of antepenultimate pair short and 

 broad, that of last two pairs oval in form. Last pair of uropoda 

 with basal part rather massive, rami subequal in length, outer 

 one lamellar and armed with two recurved hooks, inner one 

 conical in form. Telson of moderate size, with small tuberculi- 

 form projection on either side of tip. 



Species few. Characterized by the long slender body, strong 

 development of inferior antennae in male, shape of mandibular 

 palps and posterior lip. structure of gnathopoda in both sexes, 

 and form of telson. 



Key to the species. 



a. Second antennas with flagellum generally longer than last joint of pe- 

 duncle ; first gnathopods with carpus and hand narrow and very much 

 elongated: palm very short, transverse; dactyl, when closed, projects far 

 beyond end of palm ; length nine mm. ; common ; color variable. 



longimana 

 aa. Second antennae subpediform, flagellum often shorter than last joint of 

 peduncle ; first gnathopods with short stout hand ; length eighteen mm. 



rubricata 



Ampithoe longimana (S. I. Smith). 

 Plate 59. 



Amphithoc longimana (S. I. Smith) Verrill, Rep. U. S. F. Com., I, 1871-72 



(1873), p. 370. Among eel-grass. 

 — S. I. Smith, Rep. U. S. F. Com., I, 1871-72 (1873), P- 563. Neiv Jersey; 



Great South Bay, Long Island; Vineyard Sound. 

 Holmes, Biol. Bull.. II, 1901, pp. 165-193, fig. i. Provincetown to 



New Jersey. 

 Holmes, Bull. Bur. Fisher., XXIV, 1904 (1905), p. 509, figs. New 



Jersey to Massachusetts. 



