98 PERCY SLADEN TRUST EXPEDITION 



The mandibles have the cutting edge strongly tridentate, the spine row consisting of 

 seven or more short spines, the teeth of the molar saw twelve to fourteen, the palp set 

 much further back than usual in this family, its first joint a little more than a quarter as 

 long as the second, shorter but much stouter than the third, which is fringed with 

 graduated spines, increasing in size towards the apex. The distal two-fifths of the second 

 joint are spiniferous. 



The first maxillse have three plumose setae on the inner plate and eleven unequal 

 spines, of which two are obscurely denticulate, on the outer. 



The second maxillae have five setse on the inner, four on the outer, and a single seta 

 on the little median lobe. 



The maxillipeds have a broad second joint, not much longer than broad apart from 

 its produced plate, which is tipped with two setae and carries certainly one hook and 

 apparently three others. The sixth and seventh joints are not very large, the fourth and 

 fifth are broad. 



The limbs of the perseon are of the usual pattern, but not powerful, the first three 

 pairs short, the last four very slender, and of these only the two hinder pairs elongate. 

 The ventral male appendages of the seventh perseon segment are short, pai*allel- sided. 



The pleopods have setose fringes on the rami, excepting the inner ramus of the fifth 

 pair. In the second pair the peduncle is broader than long, furnished with three hooked 

 spines and a plumose seta on its inner border. The second joint of its inner ramus, 

 constituting the masculine appendix, is affixed nearly at the base of the ramus. The 

 structure is rather peculiar. The inner margin for about two-thirds of the length is 

 setuliferous and sinuous, widest at the top, rather abruptly narrowing below, the last 

 third being quite narrow, ending in a little slightly inward turned point, beyond which 

 the body of the ramus is prolonged for a short distance. In at least the first four pairs of 

 pleopods the inner upper corner of the inner ramus is overhung by a lappet which curves 

 first inward and then a little outward. 



The outer ramus of the uropods is much narrower and shorter than the inner, both 

 are round ended, and setiferous on both margins. 



Length of specimen in slightly curved position 7 mm. 



Locality. Mauritius, 5 miles W. of Black River, in surface net (d). 



The specific name, from the Greek acreA.yo/ce/Hos, signifying a creature with outrageous 

 horns or antennae, is applied to this species as one which by its antennas is in violent 

 conflict with the custom of its family. 



Gen. GIRO LAN A, Leach. 



1818. Cirolana, Leach, Diet. Sci. Nat., vol. xii., p. 347. 



11. Cirolana minuta, H. J. Hansen. 



1890. Cirolana minuta, Hansen, Vid. Selsk. Skr., ser G, vol. v., p. 347, pi. 3, fig. 5, 

 pi. 4, fig. 1. 



1900. Cirolana minuta, Stebbing, Willey's Zoological Results, pt. 5, p. 634. 



Hansen distinguishes this species from his Cirolana parva principally by its smaller 



