and some new Genera of Amphipods. 241 



plates of the maxillipeds are but scantily armed, and, as in 

 Ischjjrocenis, the first and second gnathopods of the female 

 are but little unequal, though in the male the second are 

 much larger than the first and differ in shape as well as size 

 from those of the female. 



To the family Dulichiid^e I add the f^enus Leipsuropus. 

 This is like Cyrtophuim, Dana, except that the fifth segment 

 of the pleon, tiiough present, is devoid of appendages. 



The name, signifying an omission of a uropod, refers to 

 the important generic character. The genus contains at 

 present only the Australian species described by Professor 

 Haswell as Cyrtophium parasiticam. 



In the Corophiidge a new genus is required for the Xew 

 Zealand species described by Mr. G. M. Thomson as Goro- 

 phium excavatum. The definition is as follows : — 



Body compressed, side-plates continuous. First antennae 

 slender; tiagellum consisting of several joints, without 

 accessory flagellum. Second antennae robust ; flagellum 

 slight, of more than three joints. AJandibular palp three- 

 jointed. First gnathopods as in Gorophixim. Second 

 gnathopods nearly as in Gorophium, but having the long 

 process of the fourth joint fringed on its front or inner margin, 

 while the fifth is fringed on its hind margin, the two joints 

 therefore, though fitting together, having no look of coales- 

 cence ; the sixth joint with a small palm. Third perjeopods 

 the shortest, setose, strongly spined on the sixth joint. 

 Fourth and fifth perteopods successively much longer, second 

 joint of the third to the fifth pairs widely expanded. First 

 uropods, and still more the second, stout, strongly spined ; 

 third pair small, outer ramus nearly as long as the peduncle, 

 inner oval, minute. Telson short, entire. 



For the species described by Professor Delia Valle as 

 Siphon cecetes typicus, Kroyer, 1 propose the name H. Delia- 

 vallei. 



As personally I am strongly opposed to preliminary notices 

 and duplicate publication in natural historj^, it should be 

 explained that these notes are not a freewill ofi'ering on my 

 part. They are submitted in compliance with the rules that 

 govern contributors to ' Das Tierreich.' In the general 

 revision of the Amphipoda readjustments of classification 

 appearing in their proper sequence, can be explained with 

 more brevity and understood with more ease than when they 

 have to be presented in isolation and detachment. 



