54 Prof. M'ltitosli's Notes from the 



Nicolea venustula, Montagu, Pista cristata, O. F. M., The- 

 lepus cincinnatus, O. Fabr., Gri/maa bairdi, MaLugren, 

 Lysilla laveni, Maimgren, aud the following. 



Amcea trilobata, Sars. 



Drerlged in 130 fathoms off Sponholmere, Lervig, Norway, 

 in 1879. 



Tlie cephalic lobe has a well-marked and crenate dorsal 

 collar which is continuous with the post-oral fold on the 

 ventral surface, the whole being thrown into various folds. 

 A small tongue-shaped process lies in the centre below the 

 mouth, whilst over it is the large, thin, fan-shaped flap so 

 characteristic of the species. To judge from Malmgien's 

 figures, the parts seem to vary much according to their 

 condition on preservation. From the surface of the cephalic 

 lobe pass off numerous grooved tentacles, the general appear- 

 ance toeing such as to cause Sars to place it under the genus 

 Polycirrus. 



Tlie body is much inflated anteriorly, and, in the present 

 example, chiefly ventrally, and it tapers posteriorly to the 

 tail, which is absent, but which does not seem to be much 

 attenuated in Malmgren's figure. The dorsal surface is 

 rounded and, at first sight, smooth, but is really minutely 

 papillose. The ventral surface in the example is largely 

 distended, projecting considerably on each side of the seti- 

 gerous processes. The surface of the distended region is 

 more distinctly papillose than the dorsal surface, whilst 

 in the median line are five or six small shields, the last 

 trending into, the broad median line, which behind the 

 swollen region passes into the ventral groove, which, with 

 the two lateral sulci above the ventral longitudinal muscles, 

 divides the body into three main regions — a doi-sal and two 

 veutro-lateral. The alimentary canal is distended with mud 

 containing sand-grains, a few spicules of sponges, aud com^ 

 paratively few nutritive particles. 



On each side anteriorly are ten pairs of long, flattened, 

 setigerous processes, bevelL d at the tip ; but no bristles are 

 visible, even under a lens. The first has a distinct and somC" 

 what ovoid dor>al lobe, into which the very fine hair-like 

 tips of the bristles go, and a few project beyond the tip. 

 The rest, which are equally fine, api^ear beyond the edge 

 of the bevelled region beneath. Though so few project 

 beyond the tip, many occupy the process itself, and they are 

 of considerable length and arranged in groups. The pro- 

 cesses which follow have similar bristles, but the terminal 



