152 



throughout. Cephalic segment scarcely longer than the 3 succeeding segments 

 combined; rostrum very long and evenly curved. Urosome nearly as long as the 

 anterior division, and tapering only very slightly behind, last segment about the 

 length of the preceding one, and having the anal opercle finely spinulose. Caudal 

 rami quadrate in form and slightly instricted at the base, each having, somewhat 

 beyond the middle of the outer edge, a notch carrying a slender seta and a short 

 spine, middle apical setae of moderate length. Anterior antennas comparatively 

 short and gradually attenuated distally, 8-articulate, 1st joint much the largest, 

 terminal part not attaining half the length of the proximal. Posterior antennae 

 comparatively less robust than in the 2 preceding species, outer ramus very nar- 

 row, with the middle joint extremely nr'nute and without any seta. 1st pair of 

 legs rather slender, outer ramus considerably exceeding half the length of the 

 inner, middle joint much the longest, terminal joint small, with only 3 claw-like 

 spines and a slender seta at the inner corner; inner ramus with the 2 outer joints 

 very short and subequal, apical claws rather unequal, the outer one being scarcely 

 half as long as the inner and nearly straight. Last pair of legs with the distal 

 joint large, oval in form, carrying 6 rather unequal setae, 4 of which issue from 

 the somewhat exserted and obliquely-truncated extremity; inner expansion of 

 proximal joint comparatively short, triangular, not nearly extending to the middle 

 of the distal joint, marginal setae 5 in number, the outermost one very small. 

 Ovisacs rather short, extending, as a rule, only slightly beyond the middle of 

 the urosome. 



Male of still more slender form than female. Anterior antennae consider- 

 ably more elongated, and transformed in the usual manner. Spine attached to 

 the inner corner of the 2nd basal joint in the 1st pair of legs falciform, incurved 

 and obliquely cut off at the tip. Inner ramus of 2nd pair of legs with the distal 

 spiniform appendage of the outer edge peculiarly transformed, terminating in a 

 broad securiform lamella, apical spine replaced by an ordinary plumose seta. 

 Last pair of legs very small, distal joint cordate in shape, with only 4 marginal 

 setae, the outermost but one very small, hair-like; inner expansion of proximal 

 joint very slight, with only 2 unequal setae. 



Body of a light yellowish colour with some of the segments bordered with 

 reddish brown. 



Length of adult female about 1 mm. 



Remarks. I cannot doubt that the above-described form is that originally 

 recorded by Glaus as Dactylopus similis, and subsequently mentioned by Prof. 

 Brady under tlue same name in his well-known Monograph. The suggestion of 

 the latter author, that this form, being so nearly related to Dactylopus Stromi (= D. 



