149 



on the same type as in the other Clausidiidce, penultimate joint scarcely 

 half as long as the preceding one, and provided with 3 curved setae accom- 

 panied by a thin bristle; last joint considerably longer and carrying on the 

 tip 6 very long and curved setae. Anterior lip and maxillae not much differing 

 in their structure from those parts in other Clausidiidce. Lateral lips only 

 slightly indicated. Anterior maxillipeds with no setae on the proximal joint; 

 apical spines comparatively slender and nearly straight, being only accom- 

 panied by a single seta. Posterior maxillipeds rather feeble in structure, and 

 provided with only a few comparatively short setae; terminal joint very small, 

 with only 2 minute spines on the tip. Natatory legs with the rami nearly 

 equal in size; spines of outer ramus much elongated, especially in the 1st pair. 

 Last pair of legs with the free joint narrow oblong in shape, and produced at 

 the inner distal corner to a recurved dentiform projection, marginal spines 

 moderately strong, 2 of them being attached to the end of the joint, the 3rd 

 to a distinct ledge at about the middle of the outer edge; apical bristle rather 

 slender. Ovisacs of moderate size, oblong oval in form, and scarcely at all 

 divergent. 



Colour whitish grey. 



Length of adult female 1.40 mm. 



Male unknown. 



Remarks. The present form is easily recognisable from any of the 

 other known Clausidiidce, both by the general appearance of the body and by 

 the structure of the several appendages. The anterior antennae in particular 

 are highly distinguished by their short and stout form and the coarse setae 

 clothing them. 



Occurrence. Only 3 female specimens of this remarkable form have 

 hitherto come under my notice. Two of them were taken in the outer part 

 of the Stavanger Fjord, at Bukken, from a depth of about 60 fathoms, muddy 

 bottom. The 3rd specimen was found at Riser, south coast of Norway, in 

 about the same depth. 



Fam. 11. Lichomolgidae. 



Characters. Body more or less pronouncedly cyclopoid in shape, the 

 anterior division being generally considerably dilated and sharply marked off 

 from the slender posterior one. Anterior antennae slender, and composed of 



20. Crustacea. 



