19 



male altogether wanting. Dropoda with the basal part and inner ramus spinulose 

 inside. Telson sublaminar, tapering distally, tip obtusely truncate and spinif'erous. 

 lii'Dtttrkfi. This genus was established by the present author as early as 

 in the year 1862, and may accordingly be regarded as the type of the present 

 family, though the characters of the adult male have turned out to be rather 

 anomalous. It contains, as yet, only 2 species, to be described below. 



1. Lamprops fasciata, L-J. o. Sars. 



(PI. IX & X.) 

 . G. (.). Sars, Xoolog. Reise i Soinmercn 1HH2, p. 44. 



Sjxci/ic Character. Body moderately slender, with the anterior division 

 oblong oval in form. Carapace much shorter than the exposed part of trunk, 

 blunt in front, and exhibiting on each side 3 obliquely curved folds crossing 

 the branchial regions; pseudorostral projection very short and obtuse, scarcely 

 projecting beyond the blunt antero-lateral corners. Tail, inclusive of the telson, 

 nearly as long as the anterior division. Eye rather conspicuous, with dark red 

 pigment. Inferior antennse of male about half the length of the body, and less 

 distinctly 'prehensile than in the next species. 1st pair of legs with the basal 

 joint about the length of the succeeding joints combined, and but slightly curved; 

 2nd pair with the last joint scarcely as long as the preceding one, both together 

 equalling in length the antepenultimate one ; the 3 posterior pairs densely setifer- 

 ous. Uropoda somewhat exceeding in length the last 2 segments combined, inner 

 ramus but little longer than the outer. Telson nearly twice as long as the last 

 segment, and rather broad at the base, but rapidly tapering distally, being pro- 

 vided with a single pair of slender lateral spines, apical spines 5 in number, the 

 middle one and the 2 outermost much larger than the remaining 2, and strongly di- 

 vergent. Body ornamented with a very conspicuous dark brownish violet pigment, 

 forming more or less distinct transversal bands across the segments, and in the cara- 

 pace occupying the greater part of the branchial regions behind the anterior fold. 

 Length of adult female reaching to 9 mm., that of male considerably less. 



Remarks. This form is easily recognizable by its very conspicuous co- 

 ouring, which is retained for a long time even in preserved spsecimens. The 

 adult male, unlike what is generally the case in Cumacea, does not differ much 

 in its external appearance from the young female, with which it' may easily be 

 confounded. On a closer examination, however, it may be recognized by the presence 

 of natatory exopodites on all the legs except the last pair, and by the structure 

 of the inferior antennse. The latter organs, which are generally concealed are 



