524 



APPENDIX. 



AMP HI POD A. 



HYP ERIN A. 



HYPERIIDM. 



(Vol. II. p. 19.*) 



Genus VIBILIA. 



Vibilia. Edwards, Ann. des Sci. Nat. t. xx. p. 386. Hist, des Crust. 



t. iii. p. 72. Spence Bate, Cat. Amph. B. M. p. 299. 

 Lanceola? Sat, Proc. Acad. Phil. p. 317. 



Generic character. Cephalon small. Pereion smooth, not dis- 

 tended. First two segments of the pereion short, the rest gradually 

 increasing in length. Segments of the pleon a little deeper than 

 those of the pereion. Eyes small. Antennas short ; superior pair 

 terminating in a vertically compressed uniarticulate flagellum. 

 First pair of gnathopoda small, slender, cylindrical, having the infe- 

 rior angle of the carpus but little, if at all, produced ; second pair 

 having the inferior angle of the meros and carpus considerably pro- 

 duced anteriorly. First two pairs of pereiopoda subequally long. 

 Third and fourth pairs longer than the preceding, subequal. Last 

 pair very short. Three posterior pairs of pleopoda, with the 

 peduncle long and the rami short and compressed. Telson single. 



VIBILIA BOREALIS, N.S. 



Specific character. Cephalon not anteriorly produced. Pereion with the 

 segments gradually enlarged. Flagellum of upper antennse flat, with two 

 rows of cilia on the internal surface. Last pair of pereiopoda minute. 



Length, seven-twentieths of an inch. 



