234 DE, C. CHILTON OF THE STJBTEREAXEAN 



largely developed " [4, p. 259] ; and of Pherusa they merely say, " Like Atyliis, but 

 telson not divided. Gnathopoda smaU " [4, p. 252]. 



According to Stebbing the genus Amphithopsis, Boeck, is most probably a synonym 

 of Pherusa, and of this genus he gives the foUowiug account in his notice of Boeck's 

 work. The genus is, he states, instituted for those species which have " an elongate, 

 compressed body with moderate epiuiera and long antenna? ; the inner plate of the first 

 maxiUse furnished with four or five long, thick, plumose setae ; the inner plate of the 

 second maxillae with many simple setae at the extremity, but several on the inner side 

 very strong and plumose ; the maxiUipeds large, with palps of moderate length ; the 

 two first pairs of feet with hands of nearly the same size, small ; the third and fourth 

 pairs of legs with the fifth joint very long, longer than the third joint ; the telson 

 simple ; the last uropods with the branches long, often unequal ; the marsupial plates 

 much larger than the branchiae, closely margined with hairs " [108, p. 324]. 



It appears to me that all the genera mentioned, together with several other allied 

 genera, require careful revision and systematic redescription ; and in the meantime I 

 prefer to leave my species Calliopiiis siibterraneus under Calliojjius, where I first placed 

 it, although, if we consider only the female, it should no doubt be put in the same genus 

 as Pherusa ccerulea, G. M. Thomson. It is evident, too, that due attention must be 

 paid to the sexual differences, for in Calliopiiis subterraneus the female is a Pherusa, 

 while the male, which differs chiefly in the possession of larger gnathopoda, would be 

 better placed under Calliopius. 



Cai-liopius subterkaneus, Chilton. ( d , PI. XXII. figs. 1-15, PI. XXIII. figs. 1-9 ; 

 9 , PI. XXIII. figs. 10-18.) 



Calliope subterranea, Chilton, New Zealand Journal of Science, vol. i. (January 1882) p. 14 ; id. 

 Transactions New Zealand Institute, vol. xiv. p. 177, plate ix. figs. 1-10; id. New Zealand Journal 

 of Science, vol. ii. (Mai-ch 1884) p. 89. 



Calliopim subterraneus, Thomson & Chilton, Transactions New Zealand Institute, vol. xviii. p. 148 ; 

 Thomson, Transactions New Zealand Institute, vol. xxi. p. 263. 



Calliope subterranea, Moniez, " Faune des Eaux souterraiues du Departement du Nord &e.," cxtrait de 

 la llevue Biologique du Nord de la France, tome i. (1888-89) p. 50 ; Wrzesniowski, " O trzech kielzach 

 podziemnyehj'' De tribus Crustaceis Amphipodis subterraneis, pp. 16, 90 ; id. " Ueber di-ei unter- 

 irdische Gammariden," Zeitschrift fiir wissenschaftliehe Zoologie, L. 4, pp. 611, 698. 



Specific description. — Male. Cephalon not produced into an appreciable rostrum. Eyes 

 wanting. Upper antennae about two-thirds the length of the body; first joint of 

 peduncle stout, second and third each much shorter than the j)receding; secondary 

 flagellum represented by a minute joint shorter than first joint of main flageUum. 

 Lower antennae stout, much shorter than the upper ; flagellum about as long as the 

 peduncle. CalceoU are present on the second and third joints of the peduncle, and on 

 the flagellum of the upper antenna, and on the flagellum of the lower antenna. First 

 cnathopod very large and strong ; carpus very short ; propodos much longer than basos ; 

 palm occupying nearly the whole of the posterior margin. Second guathopod also large, 

 but more slender than the first ; carpus triangular, more than half as long as propodos ; 

 palm of propodos convex, occupying about half the posterior margin. Last three pairs 



