98 



being composed of 7 well defined joints not much different in size, the terminal 

 one however rather smaller than the others. Posterior antennas with the basal 

 part distinctly subdivided, terminal joint with the spines and setae rather slender; 

 outer ramus provided with 4 stibequal ciliated setae. Posterior maxilliped with 

 the hand scarcely at all dilated and about of same size and appearance as the 

 basal joint, dactylus extremely slender, with scattered long hairs inside. 1st 

 pair of legs rather small, and provided with the usual deflexed spine at the 

 inner corner of the 2nd basal joint; rami of about equal size, with the distal 

 joint somewhat larger than the proximal one. The 3 succeeding pairs of legs 

 with the outer ramus rather strongly built and densely fringed outside with 

 small spinules, spines attached to this ramus unusually coarse, 3 of them 

 issuing close together from the end of the terminal joint; inner ramus shorter 

 and much narrower than the outer. Last pair of legs consisting of 2 juxta- 

 posed oblong quadrangular plates, contiguous at the base and fringed inside 

 and at the end with short cilia, each plate having outside, at some distance 

 from the base, a slender bristle and moreover 5 comparatively short and finely 

 denticulated spines, one of them attached to the outer edge in about the 

 middle, the other 4 to the transversely truncated end. Ovisac of moderate 

 size and globular in form. 



Male of about same size as female, and not very different in the 

 shape of the body. Anterior antennae however much more strongly built and 

 pronouncedly hinged, being apparently only composed of 5 joints, the penulti- 

 mate of which is very large and tumid, sub-pyriform in shape; terminal joint 

 forming a slender and very mobile claw-like dactylus. Posterior antennae with 

 one of the setas attached to the outer ramus much stronger than the others, 

 almost claw-shaped. 1st pair of legs differing somewhat from those in the 

 female in the shape of the inner ramus, the proximal joint of which is com- 

 paratively more produced and forming with the distal one an abrupt geniculate 

 bend. Last pair of legs rather unlike those in female, being represented by a 

 single median plate, divided at the end by a short incision into 2 small lobules, 

 each carrying 2 short spines. Genital lobes rather prominent, each armed 

 with 2 coarse spines. 



Body in both sexes pellucid, without any conspicuous pigmentation. 

 Eye in preserved specimens inconspicuous, but well observable in the living 

 animal, and of a light red colour. 



Length of adult female reaching 0.67 mm. 



Remarks. This form has by most authors been recorded under the 

 name Euterpe gracilis given to it by Glaus; but there cannot be any doubt 



