131 



Male with the inner ramus of 2nd pair of legs rather unlike that in the 

 other species, the distal joint being considerably shortened, and having the outer 

 edge fringed with long delicate cilia, tip armed with a remarkably strong angu- 

 larly bent spine. Last pair of legs with the distal joint of about same shape as 

 in the female, but of smaller size and only provided with 5 marginal setae; inner 

 expansion of proximal joint, as usual, far less prominent and carrying 3 spini- 

 form setse. 



Colour pale yellow, urosome and part of metasome tinged with orange. 



Length of adult female 0.63 mm. 



Remarks. This is a very distinct and easily recognizable form, differing 

 in some points rather markedly from the other species. The Dactylopus latipes 

 of Boeck is unquestionably identical with Claus's species. This is however not 

 the case with the form described by Scott under the same name from the Gulf 

 of Guinea. 



Occurrence. I have only met with this form quite occasionally in the 

 upper part of the Christiania Fjord, as also in some places on the west coast of 

 Norway. The specimens were found among algae in the littoral region. Th. Scott 

 also records this form from the Finmark coast. 



Distribution. Mediterranean (Glaus), British Isles (Brady). 



Gen. 34. DaCtylOpOdella, G. 0. Sars, n. 



Generic Characters. Body much dilated and slightly depressed in front, 

 attenuated behind. Cephalic segment large and expanded, with the rostrum well 

 developed and deflexed. Urosome much narrower than the anterior division; 

 caudal ratni short, apical setse normal. Anterior antenna comparatively small, 

 with the number of articulations reduced. Posterior antennae with the outer ramus 

 of moderate size, biarticulate. Oral parts normally developed. 1st pair of legs 

 with the outer ramus shorter than the inner and somewhat resembling that in the 

 genus Dactylopusia, though having the apical claws much more slender and geni- 

 culate; inner ramus only composed of 2 joints, the proximal one only slightly 

 dilated, distal joint armed with 2 very strong subequal claws. Natatory legs with 

 the outer ramus much longer than the inner and densely spinulose outside; inner 

 ramus of 2nd pair of legs with the 2 outer joints in both sexes confluent, in 

 male tipped with a strong spine, outer edge unarmed. Middle joint of same ramus 



