4° 



DISCOVERY REPORTS 



Elaphocaris 3. Length 1-5 mm. Rostrum 0-75 mm. 



Rostrum without lateral or ventral spines. Supraorbital process large, curving inwards 

 over the rostrum, with seven or eight spines. Lateral lappets of carapace bearing 12 or 

 13 spines. Posterior margin with a transverse row of 14 spines; posterior median spine 

 as long as abdomen. 



Fig. 31. S. corniculiim B. a, Elaphocaris 3, lateral; b, ventral. 



The Elaphocaris which is regarded as belonging to Acanthosoma form B (Fig. 31) 

 differs in stage 3 from the form described above only in having fewer spines on the 

 lateral and posterior parts of the carapace. The former group is of nine spines while 

 there are only five on each side of the posterior median spine (Fig. 31 a). 



Colour. A large bright red patch just behind centre of thorax; otherwise colourless. 



Acanthosoma i (Fig. 32 a). Length 3-28 mm. Rostrum i-i mm. 



Rostrum longer than antennule, with basal spine rather large. Supraorbital spine 

 slender, longer than eye. Hepatic spine swollen at base and with long spinules at base; 

 anterior lateral spine with a series of very long spinules at base ; posterior lateral spine 

 smaller, with two long spinules at base. Posterior dorsal spine absent. Dorsal organ 

 a rather large blunt process. 



