THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SECOND SERIES.] 

 No. 69. SEPTEMBER 1853. 



XVI . — Notes on some new or little-known Marine Animals. 

 (No. 2.) By P. H. Gosse, A.L.S. 



[With a Plate.] 



Class CRUSTACEA. 



Fam. Pal.«monid.«. 



Hippolyte fascigera (mihi). The Plumed Hippolyte. 



Rostrum straight, acuminate, with two teeth above, the one at 

 the base and the other near the apex ; two teeth below, the one 

 near the middle, the other near the tip. Body studded with 

 deciduous tufts of plumes. 



This curious species attains about ^ths of an inch in length. 

 The carapace is moderately gibbous ; the rostrum straight, elon- 

 gated, furnished on its upper edge with a curved tooth near the 

 base, and a second small one so close to the extremity, that the 

 tip might almost with propriety be called bifid ; the tip itself is 

 acute, and extends a little beyond the apical tooth ; on the under 

 edge, which is much hollowed at the base, and deep in the 

 middle, there are two teeth, of which one is a little beyond the 

 middle, and the other near the tip, but considerably behind the 

 line of the upper apical tooth. The scale of the external antenna 

 is large, exceeding the rostrum by one-third of its own length ; 

 its tooth is placed about one-fifth from the extremity. The 

 thicker filament of the internal antenna is comparatively slender, 

 not longer than the thin filament, and bent up at a right angle. 

 The first pair of feet are short ; the second has the wrist four- 

 jointed. The middle plate of the tail has two spines on each 

 side, and six placed slightly divergently at its extremity, of which 

 the outermost on each side is minute. 



The most remarkable character is that each segment of the 

 Ann.&;Mag.N.Hist. Sev.2. Vol. \ii. 11 



