308 A HISTOEY OF RECENT CRUSTACEA 



For Sars's Petalomera, 1882, and Petalopus, 1865, both 

 preoccupied, I propose Petalosarsia. It has no eye. The 

 last segment of the trunk is firmly united to the preceding. 

 The first perasopods are devoid of the seventh joint and 

 have the so-called merus or fourth joint like a petal or 

 leaf, an expansion which is unique. There are no rudi- 

 mentary exopods on the third and fourth pleopods of the 

 female, nor rudimentary pleopods on the second to the fifth 

 pleon-segraents of the male. The single species is Petalo- 

 sarsia decUvis, Sars, from the Lofoden Islands and Spitz- 

 bergen. It has been recently taken in the Firth of Forth. 



Strauchia, Czerniavsky, 1869, is described as having 

 exopods on the second and third peraeopods in the female, 

 and none on the first, which would require for it the 

 institution of a separate family, Strauchidae. But pro- 

 bably allowance should be made for some mistake in the 

 description, as the single specimen of the single species, 

 Strauchia iwarica, Czerniavsky, is said to be about a 

 twenty-fifth of an inch long ! A small distinct telson is 

 attributed to it, which rather points to its position among 

 the Pseudocumidag, but this species from the Black Sea is 

 at present involved in obscurity. 



Familt/ 7 . — Lamjyropidce . 



The first antenna3 have both flagella well developed 

 and nearly equal. The flagellum of the second antenna? 

 in the male is composed of many short joints. The epipod 

 of the first maxillipeds has few finger-shaped branchial 

 sacs. The first two pairs or only the first pair of perseo- 

 pods in the female and the first four pairs in the male 

 have well-developed swimming-branches. In the male 

 there are three pairs of pleopods or none. The branches 

 of the nropods are very slender, the inner three-jointed. 

 The telson is distinct, with three or more terminal spines. 



There are five genera. 



Lamprops, Sars, 1863, meaning 'bright-eyed,' has the 

 flagellum of the second antennas in the male relatively 

 short and prehensile ; the third and fourth per^eopods in 



