6o 



DISCOVERY REPORTS 



Elaphocaris 3 (Fig. 53 a, b). Length (approximate) 2-0 mm. Rostrum 0-9 mm. 



Rostrum rather short, with one pair of lateral and two long ventral spines. Supra- 

 orbital process very stout, with 18 spines. Lateral process stout, with 19 spines. 

 Posterior process not reaching end of abdomen, with four pairs of lateral spines. In the 

 specimen described there is an unpaired spine at the base directed forwards. 



Abdominal somites with slender pleural spines. Arms of telson narrow, width less 

 than half length ; spine 5 the longest. 



Fig. 52. S. annatiis. a, Elaphocaris i ; b, Elaphocaris 2; c, dorsal spine, side view. 



The description and figure are taken from a moulted skin, since no others were taken 

 at Bermuda. A damaged specimen from Discovery Station 701 which appears to belong 

 to this species has a minute dorsal organ, and the eye is short and pear-shaped, the 

 width of eyeball three-quarters length of eye. 



Acanthosoma i (Fig. 54). Length 3-1 mm. Rostrum 0-9 mm. 



Rostrum a little longer than antennule, with small basal spine. Supraorbital spines 

 reaching end of segment i of antennule. Hepatic spine very small. Two pairs of stout 

 lateral spines. Posterior dorsal spine rather small. Dorsal organ very small. 



Abdominal somites with dorsal spines nearly equal, the third a little the longest. 

 Lateral spines 1-3 very stout and spiny, 4 and 5 small, smooth, or with a few spinules. 

 Telson about i^ times as long as wide, with small distal fork and no lateral spines. 

 Somites 1-3 with blunt ventral spines. 



