168 



the largest, and considerably exceeding in length the outer 2 combined; apical 

 claws rather slender and of nearly equal length, though successively coarser 

 inwards. Maxillae with the terminal lappet evenly attenuated and almost quite 

 smooth. Anterior maxillipeds with the apical lash coarsely denticulated in its 

 proximal part; lateral spine of distal joint attached near the base of the joint 

 and accompanied by a short seta. Posterior maxillipeds rather coarse, with 

 the 1st joint fully as long as the other 2 combined; propodal joint armed 

 with a strong ciliated spine inside in the middle; dactylar joint claw-like, with 

 a well-marked spine outside the base. The 3 anterior pairs of natatory legs 

 normally developed, with the rami slightly unequal in length, the inner one 

 being the longer; all spines coarsely denticulate. 4th pair of legs with the 

 outer ramus more slender than in the preceding pairs, and wanting one of the 

 spines on the terminal joint; inner ramus shorter than the first 2 joints of the 

 outer combined, and exhibiting outside in the middle a well-marked notch; apical 

 spines narrow dagger-shaped and rather unequal in length, the inner one 

 being nearly twice as long as the outer. Last pair of legs, as in the other 

 species of the present genus, replaced on each side by a spine inserted 

 directly on the corresponding segment and accompanied by 2 small setae, the 

 spine in the] present species being rather slender and exhibiting at the base a 

 slight dilatation. Ovisacs not very large, fusiform in shape, and considerably 

 divergent. 



Colour yellowish brown. 



Length of adult female amounting to 1.30 mm. 



Male unknown. 



Remarks. This is the species upon which Glaus founded his genus 

 Psendanthessiiis, and it ought accordingly to be regarded as the type of the 

 present genus. In the slender form of the tail and the narrowly-produced caudal 

 rami, this species bears much resemblance to the form recorded by Brady as 

 Lichomolgus Thorelli, and indeed I at first believed the two to be identical. 

 T. Scott, however, regards them as distinct, and the detail-figures given by Brady 

 exhibit in reality some points of difference, especially as regards the form of 

 the genital segment and the relative size of the inner ramus of the 4th pair 

 of legs. A redescription of Brady's species would however be very desirable. 



Occurrence. I have met with this form occasionally in several places, 

 both on the south and west coasts .of Norway. All the specimens were of the 

 female sex, and were found in the free condition among dredged material 

 taken up from moderate depths. 



Distribution. British Isles (Scott), Mediterranean (Glaus), Ceylon (A. Scott). 



