230 WALTER E. COLLINGE. 



Akermania gen. nov. 



Body oblong oval, strongly convex, richly setose or spiny ; 

 scales large and definite, variable in shape. Cephalon without 

 lateral or median lobes; anterior and posterior margins 

 distinct ; epistome almost flat. Eyes compound, ocelli large, 

 situated dorso-laterally. Antennulae absent. Antennae very 

 short ; flagellum 2-jointed. Coxopodite of the 1st and 2nd 

 mesosomatic segments folded to form a groove and ridge 

 beneath the pleural plates. Appendages of the mesosome 

 feebly developed. Uropoda short and small, not extending 

 beyond the telson, thick, strongly-raised, and convex; exo- 

 podite small, situated in a groove on the lower inner margin 

 of the basipodite. Telson ovally expanded anteriorly, broader 

 than long, posterior margin almost truncate. 



This genus differs from Cubaris Brandt in the form of 

 the cephalon, the absence of antennul^, in the feeble develop- 

 ment of the mesosomatic appendages, and in the form of the 

 telson and uropoda. Further, in the great development of 

 the spines, setae, and scales, it differs from any other genus 

 of the family C u b a r i d as . 



Akermania spinosa sp. n. PL XIV, figs. 1-12. 



Body oblong oval, strongly convex, with numerous bluntly- 

 ending spines and short setae with bulbous bases, on the 

 cephalon and mesosomatic segments ; on the metasomatic 

 segments the spines are fewer (fig. 1). Cephalon (fig. 2) 

 without lateral or median lobes; anterior and posterior margins 

 distinct, anterior margin with tooth -like spines ; epistome 

 almost flat. Eyes fairly large, compound, with large ocelli, 

 situated dorso-laterally. Antennulse absent. Antennae (fig. 3) 

 short, setose ; flagellum 2-jointed, the distal joint being slightly 

 more than twice the length of the proximal one, with terminal 

 setose style. First maxillae (fig. 4), outer lobe terminating 

 in four stout, incurved spines and six smaller, straighter ones ; 

 inner lobe narrow, with two equal-sized setose spines. Second 

 maxilleo (fig. 4) thin and plate-like, terminating distally in a 



