45 



curved in their exterior part, and witli a similarly curved very short terminal piece: their 

 (shape is not indicated by Claparede in the E. Kefersteiuii) by their shaft being straight, and 

 the terminal piece also straight, proportionally longer than in the Exogonc, linear or knife- 

 shaped, or in other words, they are not sickle-shaped, but thorny (setae spinosa;). 



9. Parauipliinome piilchella. M. Sars. 



nov. gen. ct sp. 

 (Plate IV. fig. 19—35). 



Of the extensive group of Amphinomes, which in the tropical seas display so great 

 riches of genera and species, only very few northern forms have hitherto l)een noticed, and 

 these only such as belong to the family of the Euphrosynida?, namely 1 species of the genus 

 Spinter Johnston and 3 species of the genus Euphrosyne Sav. The typical family Amphino- 

 midic was on the contrary considered to be exclusively confined to the tropical oceans, until 

 my Father * in a few words announced the discovery of a species of the genus Eurythoe 

 Kinberg (E. borealis M. Sars) a single specimen of which had been observed by him a long 

 time ago at ilauger in the neighborhood of Eergeu. Unfortunately it was not possible to 

 institute a scrutinising examination of this interesting species; as it has not since beenfoimd 

 again, and the original specimen was not preseiTed. ^lalmgren therefore^ expresses his 

 opinion of this species, that it probably does not belong to our fauna, but that the specimen 

 observed must be considered as having been accidentally carried by the Gulfstream, from 

 warmer seas to our west coast. Tlie discovery of a new form belonging to the same family 

 is now therefore of great, interest; since this foi-m can with full certainty be claimed for our 

 Fauna, and even seems widely distributed along our coasts. It forms the type for a new 

 genus, the affinity of which with the typical genus Amphinome is expressed in the name. 



Jhc hody, which in most specimens is only 9 Mm. long, is (see fig. 19) tolerably narrow 

 nearly cylindrical, or only a little wider than high, with the ventral and dorsal sides evenly 

 convex; tapering a little towards both ends although not considerably. The bristle-bearing 

 segments, the number of which is somewhat variable, and in the largest specimens goes up 

 to .1.3, are about twice as wide as long, and rather sharply divided from each other. 



The hcad-lohc is (see fig. 20 & 22) of roundish oval form, and narrower than the V.' 

 segment, it is strongly convex in the upper part, especially behind, and it inclines evenly down- 

 wards in front (see fig. 23). The frontal border is rounded, but in living specimens (see fig. 

 22) somewhat drawn out in the middle, or conically rounded. Tlie posterior part of the head- 



' Christiania Vid. Selskabs Forhandlinger for 1861. 

 * Annulata polychseta, pg. 2. 



