REPORT ON THE STOMATOPODA. 



91 



specimen, which is shown in Claus's figure 34, has on the dactylus of the raptorial claw two 

 marginal sjnnes besides the terminal one, he derives the provisional specific name from 

 this characteristic. 



The Challenger collections contain two specimens of the same larval type ; one fi-om 

 the Cape of Good Hope (PI. IX. figs. 1 and 2), a little older than Claus's larva, and with 

 three spines on the dactylus besides the terminal one, and 2 5 "3 9 mm. long ; and another 

 from the Gulf of Penas, younger than Claus's larva, with only one spine, and 17 '57 mm. 

 long. The two specimens, which undoubtedly belong to a single species, difier very slightly 

 from Claus's larva, which may possibly be the young of a distinct species, although the 

 diff'erences are so very slight that it seems best to retain Claus's specific name Alima 

 hidens for them all. 



Alima hidens is characterised as follows : — The very short and narrow carapace, which 

 has no median dorsal spine, makes with the dorsal rostrum only ? of the total 

 length, and its deeply emarginated posterior edge exposes the four posterior thoracic 

 somites. The long tip of the slender rostrum is in front of the end of the shaft of the 

 first antenna, and the length of the rostrum is a little more than half the length of the 

 carapace, measured on the middle line from its base. The antero-lateral spines of the 

 carapace are unusually long and divergent ; the tips of the long postero-laterals are opposite 



