234 DE. C. CHILTON OF THE SUBTEREAXEAN 



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

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



According to Stebbing the genus Am2Mthopsis, Boeck, is most probably a synonym 

 of Phcrusa, and of this genus he gives the following account in his notice of Bocck's 

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

 compressed body with moderate epimera and long antennae ; the inner plate of the first 

 maxillae 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 maxillipeds 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 CalUopius suhterraneus under CalUopius, where I first placed 

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

 as Fherusa ccerulea, Gr. M. Thomson. It is evident, too, that due attention must be 

 paid to the sexual diff'erences, for in CalUopius subterraneus the female is a Pherusa, 

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

 better placed under CalUopius. 



Calliopius subterraneus, Chilton. ( j , PI. XXII. figs. 1-15, PI. XXIll. figs. 1-9 ; 

 5 , PL XXIII. figs. 10-18.) 



Calliope subterranea, Chiltou, New Zealaud Joiu'ual of Science, vol. i. (January 1882) p. 14 ; id. 

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

 of Science, vol. ii. (March 1884) p. 89. 



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

 Thomson, Transactions New Zealaud Institute, vol. xxi. p. 2G2. 



Calliope subterranea, Monicz, " Faune des Eaux souterraiues du Departement du Nord &c.," cxtrait de 

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

 podziemnych," De tribiis Crustaceis Amphipodis subterraneis, pp. 16, 90 ; id. " Ueber drei unter- 

 irdische Gammariden,'' Zeitschrift t'iir wissenschaftliche 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 preceding; secondary 

 flagellum represented by a minute joint shorter than first joint of mam flagellum. 

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

 peduncle. Calceoli 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 antemia. First 

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

 palm occupying nearly the whole of the posterior margin. Second gnathopod 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 



