STALK-EYED CRUSTACEA 



35 



a'^. No remarkable spine on lateral edge between eye 

 and branchial region. — (A^. nn/mta.) 



B. External antennae not as long as rostrum. 



d. Spine at root of rostral spine nearly half as long as 

 rostral horn. 



^'. A large lateral spine, curving forwards half-way 

 between eye and branchial region. — (N. crhiacea^ 



I. Nibilia armata. 

 Nibilia armata ... A. Milne Edwards. 



Carapace slightly enlarged behind and covered with 

 sharp and unequal spines, of which the arrangement is 

 very irregular. Lateral spine between orbit and branchial 

 region not very remarkable for size. The rostral horns 

 fine ; there is a long praeorbital spine followed by a 

 shorter spine. The external antennae are as long as the 

 horns of the rostrum ; their basal joint terminates in a 

 spine shorter than the prseorbital spine. 



The fourth and fifth joint of the first pair of legs and 

 the fourth joint of the walking legs have spines. The 

 body and legs have short stiff hairs. 



Range. — Barbados, St. Vincent, Grenadines. 



2. Nibilia erinacea. 



Nibilia erinacea ... A. Milne Edwards. 



Carapace much swollen ; very spinous. The front is 

 prominent, and formed of six spines ; two of the rostrum 

 long, almost cylindrical, united at their base, but separated 

 and diverging through four-fifths of their length ; two 

 praeocular spines nearly half as long as the rostral horns, 

 pointed and directed outwards and a little upwards ; at 

 the base of these latter there is a small spine. The 



