114 



hairs in their outer part, tip obtusely pointed. Superior antennae exceeding in 

 length the breadth of the cephalon, 1st joint of the peduncle rather elongated, 

 Hagellum scarcely longer than that joint, and composed of 3 articulations. Inferior 

 antenna} but little longer than the superior, and of the structure characteristic of 

 the genus; flagellum 7-articulate. 1st pair of legs with the carpus strongly dilated 

 distally, being considerably broader than it is long, and armed inside with 2 

 strong spines, anteriorly with 2 smaller ones ; propodos oblong oval, exceeding the 

 carpus in size; dactylus strong, with 2 small denticles inside. Ambulatory legs 

 about of same structure as in Paramunna lilobata. Middle piece of male oper- 

 culum likewise rather similar, though comparatively smaller. Uropoda with the 

 outer ramus extremely small. Colour bright red. Length of adult female 1 ! /a mm. 



Remarks. This is the species first recorded, and it may accordingly be 

 regarded as the type of the genus. It is easily recognized from the other 2 

 Norwegian species by the peculiar rod-like spines radiating from the sides of 

 the fore-part cf the body. 



Occurrence. The species occurs along the whole Norwegian coast, from 

 the Christiania Fjord to Vadso, and is often found in considerable numbers on 

 a muddy bottom, in depths ranging from 6 to 30 fathoms. It is a rather sluggish 

 animal, creeping slowly along the bottom, and is often so thickly covered with 

 muddy particles as only with great difficulty to be discerned. Out of Norway, 

 it has not yet been recorded. 



2. Pleurog'onium inerme, G. 0. Sars. 



(Pi. XLVIIt, fig. 1.) 

 Pleurogonium inerme, G. O. Sars, Oversigt at' Norges Crustaceer I, p. t>7, PI. 2. fig. 5. 



Specific Clutrfirtrrx. Very like the preceding species, but without a trace 

 of the rod-like lateral spines characteristic of that form, the lateral parts of the 

 segments being only obtusely angular. Cephalon somewhat less produced in front, 

 and almost twice as broad as it is long. Caudal segment comparatively larger 

 and broader than in the type species, obcordate in form, tip pointed. The 

 several appendages of the body nearly exactly as in P. rubicundum. Colour pale 

 greyish, with a very faint reddish tinge. Length of adult female about 2 mm. 



Remarks. The present form is so very like the preceding one, that at 

 first I only regarded it as an accidental variety. Having, however, subsequently 

 found it in several places, and of pretty constant appearance, I am now of the 

 opinion that it represents a distinct, though very closely allied species. It is 



