165 



powerfully developed, with the propodos large and fringed inside with a dense 

 row of delicate spinules; dactylus slender falciform and abruptly bent at 

 the base. 



Body in female semipellucid, with a more or less distinct yellowish 

 brown tinge, and the segments partly edged behind with a light rosy pigment; 

 ovarial tubes and ovisacs dark green. 



Length of adult female amounting to 1.20 mm., of male to 0.90 mm. 



Remarks. This form was recorded as early as the year 1872 by Brady 

 under the above name, and was subsequently redescribed by the same author 

 in his well-known Monograph as a species of the genus Lichomolgns. It is 

 an easily recognisable form, differing from most other Lichomolgidas, both as 

 to the general appearance and to the structure of some of the appendages, 

 for instance the posterior antennae. 



Occurrence. -I have taken this form in many places, both on the west 

 and south coasts of Norway, as also in the upper part of the Christiania Fjord. 

 It is generally found in moderate depths among algae and other marine growths, 

 and always in the free condition. Indeed, it is not improbable that, as sugges- 

 ted by Brady, it derives its food to a great extent from the juices of the algae 

 or from small particles licked up from the surface of their fronds. 



Distribution British Isles (Brady). 



88. Macrocheiron hirsutipes (Scott). 



(PI. XCII). 



Lichomolgus hirsutipes, Scott, Eleventh Ann. Rep. of the Fishery Board for Scotland, 



Part III, p. 20fi. PI. IV, figs. 1 12. 



Specific Characters. Female. Body a little more slender than in the 

 preceding species, though having the anterior division comparatively broader 

 and less vaulted. Cephalic segment large, fully twice as long as the 3 suc- 

 ceeding segments combined, and exhibiting a very slight indication of a trans- 

 verse suture behind. Last trunk-segment very narrow and sharply marked off 

 form the preceding one. Tail rather slender, considerably exceeding half the 

 length of the anterior division; genital segment comparatively large and dilated 

 in front of the middle, with the posterior cylindric part sharply marked off 

 from the anterior; anal segment a little larger than the preceding one. Caudal 

 rami resembling in structure those in the type species. Anterior antennae also 

 rather similar, though somewhat more elongated, with the penultimate joint 

 longer than the terminal one. Posterior antennas rather unlike those in the 



22. Crustacea. 



