of the Gulf of St. Lawrence. 263 



(PL IX. fig. 2) have elongated tips with a trace of a secon- 

 dary process ; and the spiniferous region is long. The smooth 

 tip becomes more boldly marked inferiorly (PL IX. fig. 3) ; 

 but the secondary process is always a mere rudiment, except, 

 perhaps, in some of the young bristles inferiorly, or in those 

 specially protected (e. g. PL IX. fig. 4). The general cha- 

 racters of the form agree with L. rarispina ; but the bristles 

 differ considerably from Malmgren's representations. The 

 young forms do not show the cilia on the ventral cirri — an 

 absence which may have been due occasionally to position ; 

 but the want of the characteristic elongated processes on the 

 scales of such is peculiar. 



Malmgrenia WTiiteavesi'i ^ , n. sp. 



A single small specimen about ^ inch long occurred between 

 Anticosti and the Gaspe peninsula in 110 to 221 fathoms. 

 The segments are about twenty in number, and the feet deeply 

 cut ; scales absent. The head is apparently eyeless. Antennae, 

 palpi, and cirri smooth and much tapered. The dorsal cirri 

 do not extend beyond the tips of the bristles ; the ventral reach 

 the bases of the latter. The dorsal branch of the foot bears a 

 series of rather slender, elongated, translucent bristles with 

 fine serrations and a characteristic tip (PL IX. fig. 5) ; a few 

 next the body are short and more boldly serrated. The ven- 

 tral form two sets, — a superior and larger group of delicate 

 elongated bristles with tapeiing tips, minutely bifid at the 

 extremity (PL IX. fig, 6) ; the tips gradually diminish to- 

 wards the inferior border of the series, the Avhole, however, 

 being bifid. At the ventral edge anotlier, small group of 

 stouter bristles exists, the number being variable, generally 

 from six to eight : the enlarged tips of these are serrated for 

 the lower half ; then the smooth tip diminishes to a hooked 

 point (PL IX. fig. 7). 



Antinoe Sarsi, Kinb. 



This species is not uncommon in the gulf. The scales have 

 cilia on their posterior and outer borders, and small conical 

 spines. The much elongated and tapered dorsal cirri have 

 rather short clavate papillae continued almost to the tip of the 

 organ. The ventral cirrus has shorter cilia of a similar shape. 

 The dorsal bristles are distinctly curved, and have somewhat 

 wide and prominent rows of spines, so that in some positions 

 the more slender forms resemble stems of the common Equi- 

 .<ietiim. The superior ventral series of bristles have capillary 



• The ^enus is a new one lately formed for certain British species. 

 The epecifac name is explained in the first parag^raph of the paper. 



19* 



