400 W. C. M'INTOSH ON THE ANNELIDA 



an examination of many preparations of E. impar this would not seem to occur fre- 

 quently ; and it is possible the same cause acts here as in the case of the deep-sea fishes, 

 which are drawn up with eyes and intestine projecting. 



Heemadion assimilb, M'I., was dredged in IGO fathoms east of Cape de Gatte (six 

 miles from shore) in 1870. 



Antinoe finmaechica, Mgrn. In his ' Annulata Polychseta' Dr. Malmgren mentions ' 

 (in two lines) a species of this name having thirty-five segments, the elytra scarcely if 

 at all ciliated, and stouter and shorter bristles than in A. sard. A small translucent 

 specimen which was dredged off the west coast of Ireland (Donegal) in 20 and 420 

 fathoms, in the Expedition of 1869, seems to agree with all that is published about the 

 above-mentioned species. 



On contrasting it with A. sarsi of the same size, the head is found to be similar ; but 

 the eyes seem slightly larger. The slender cirri with filiform tips are furnished with 

 long and conspicuous clavate papillae, the latter often showing a fine terminal ciliary 

 process. The soft pellucid scales have short and sparsely distributed clavate papilla? 

 along the outer and posterior borders ; but the general surface has only a few sparse sub- 

 acute papillae, occasionally with the summits curiously truncated. Most of the papillee 

 show the fine palpocils at the tip. 



The dorsal bristles are translucent, sharply tapered from the commencement of the 

 spinous portion to the tip, so as to give them a peculiar character. Those next 

 the ventral series (in the ordinary position under the microscope) are nearly straight 

 (PI. LXXII. fig. 1), while a thicker and more curved group occupy the inner edge 

 (PI. LXXII. fig. 2). Contrasted with the bristles from a specimen of A. sarsi they are 

 on the whole much longer, less curved, more acutely tapered at the tip, and with more 

 closely arranged spinous rows. The ventral bristles, again, are decidedly stouter than in 

 A. sarsi, and the character of the tip difiTers. Superiorly, instead of those with capillary 

 tips, are bristles with a very long and delicate portion of appreciable breadth, distinctly 

 spined, and ending in a slightly curved point. The spinous rows continue nearly to 

 the latter. The tips gradually diminish in length toward the inferior edge, and the 

 spinous rows are closer. Some show a tendency to have long filaments at the tip as in 

 A. mollis ; but the feature is indistinct. 



Antinoe mollis, M. Sars. In an excellent brochure published lately by Prof. G. O. 

 Sars ^, from the materials left by his distinguished father, this form is described as 

 Lmnilla mollis. It seems to me, however, to be linked in a very close manner to the 

 foregoing. Two fragments were procured in 257 fathoms in the Atlantic in 1870. 



' Page 13. 



^ ' Bidrag til Kundskaben om Christianiafjordens Fauna/ 1873, p. 7, pi. xiv. 



