5° 



ANNELIDS. I. 



on the western as well as on the eastern coast. Further it is known from the east coast of N. America. 

 It is known as far north as Smith's sound. Besides Iceland and the Faroe Islands it is known from 

 Spitzbergen, Novava-Zemlya and Kara Sea. 



In Danish fairways the species is not uncommon, where it is known from Limfjorden, Hirts- 

 holmene, Samso, 0resund, and it can be found, vide Michaelsen, in the western part of the Baltic, where 

 it can be met with in Kieler-Bay and Travemunde-Bay. Southwards it is known from the North- 

 western coast of France and, according to Fauvel (1914), at "Cape de bonne esperance and Pacifique." 



It must be regarded as a coast-form with an uncommon wide range. 



Sthenelais filamentosus n. sp. 



PI. IV, fig. 6. PI. V, fig. 9. 

 Locality: 



Medalland Bay. South Iceland, 90—70 fms. 



Fragments of five specimens are present. It is impossible to indicate correctly the length of 

 this species; at any rate it does not appear to be very great. The largest fragment, which likely makes 

 a little more or a little less than the foremost half of the animal, measures 25 mm. in length; the 

 greatest breadth, only a little behind the cephalic lobe, is 4 mm. 



Habitually this species calls to mind Sthenelais boa, but the dorsum is not entirely covered by 

 the scales; a narrow longitudinal streak in the middle of the back is visible almost throughout the whole 



length of the animal. The colour of the elytra 

 has a brownish design similar to that com- 

 mon in the above named species. 



The cephalic lobe (PI. IV, fig. 6) is rather large, 

 somewhat broader than long; its two side-halves 

 project rather conspicuously, but they are partly 

 coalesced with the first parapodium on each side. 

 In the front the former is strongly constricted 

 towards the base of the unpaired tentacle. As 

 usual, two ciliated flabs are found; in the species 

 under consideration they are rather prominent, 

 somewhat longer than the basal joint of the 

 tentacle. Of the four eyes only one pair is to 

 be seen from above; these two eyes are situated 

 a little behind the constriction of the cephalic 



fig. 22 



lobe, opposite to the two ciliated flabs, at some distance from each other. The other pair is situated 

 just in the named constriction, and so ventrally that it is only visible from the ventral side. Generally 

 the eyes are rather strongly pigmented; in some individuals they are extraordinarily pale. The unpaired 

 tentacle is of medium length and rather slender. The palps are long, slender and taper gradually towards 

 the tip; their surface is, as usual in these forms, perfectly smooth. The two at the base of the palps 

 situated spooushaped bodies are in this species relatively large; the} - are oval, their distal half is bent 



