304 
GAMMAKXim 
AMPHIPODA. 
NAT ATOM A. 
GA MM A RIDES. 
BATHYPOREIA PILOSA. 
Specific character. Inferior antennas not half the length of the animal ; 
flagellum not longer than the peduncle, consisting of six or seven unequal 
articuli. Fourth segment of the tail with a transverse sinus. 
Length ^ inch . 
Bathyporeia-pilosa. Lindstkom, Ofvers. Kongl. Yet. Akad. Forhandl. 
1855, p. 59. Nat. Hist. Review, Jan. 1857, 
fig. c. White, Pop. Hist. Brit. Crust, p. 188. 
Spence Bate, Cat. Amph. Brit. Mus. p. 172, 
pi. xxxi. fig. 4. 
Tkerdtes Guilliamsonia. Spence Bate, Rep. Brit. Assoc. 1855, p. 59. 
Ann. Nat. Hist. 2 ser. xix. p. 146. 
The superior antennae have the first joint very broad, 
and longer than the head: the second joint is very 
short and narrow ; it articulates with the first subapically 
upon the inferior surface : the third joint is still 
shorter and narrower than the second : the flagellum 
is about the same length as the peduncle ; the first 
articulus being longer than the last joint of the ped- 
uncle, the remaining four or five being of irregular 
