20 ANNELIDS. I. 



The ventral setae are present in two rather different forms, partly smooth, (fig. 6 b) partly spiny 

 (fig. 6 e). In this respect it calls to mind the H. dorealis, Theel, to which it perhaps will prove to be closely 

 related. At any rate the ventral setae of the species from Skager Rack are provided with a distinct tooth 

 nnder the tip, and therefore must be regarded as specifically different from the species of Theel (fig. 64 



The above named elytron is rather thin, translucent and membranous; it is moreover so soft 

 and delicate that it takes creases just like moist silk-paper. Its surface is densely beset with micros- 

 copical, conical bodies which resemble small spines but, they do not terminate with an acute tip; 

 most of them have the apex obliquely cut off or rounded. Along the caudal edge of the scale are 

 situated long, thread-shaped papillae. 



As remarked above, it is necessary to mention this scale under correction. It was - as said 

 — lying loose in the glass and the only one which was present. 



Harmothoe Hubrechti Mc. Intosh. 



PI. II, figs. 2, 5, 6. 

 1900. Evari/r HubrecJiti, Mc. Intosh: A monograph of the British Annelids II, p. 360. 

 1914. Lagisca , Fauvel : Annelides polychetes 11011 pelagiques provenant des campagne de 



PHirondelle et de la princesse Alice, p. 67. 



Localities : 



65°oo' N. L. 28°io' W. L. 800 m. Wire. Young fish trawl. West of Iceland. 



South of Iceland. 

 — — South West of the Faroes. 



— South of the Faroes. 

 South of the Faroes. 

 South West of Ireland. 

 South West of Ireland. 



On most of the above-named localities a number of specimens has been taken — on a single 

 station more than twenty of a form which, on the whole, agrees with Mac. Intosh's Evame Hubrechti. 

 According to Mc. Intosh this interesting form has been taken several times, earliest by the "Triton," in 

 1882 in a depth of 600 fms. Further depths of 500 and 300 fm. are named, and finally the species is 

 said to have been taken at the surface. Fauvel names localities from Newfoundland and the Acores 

 with depths between 1241 and 1294 fm. 



Mc. Intosh as well as Fauvel mentions single individuals with somewhat aberrant shape of 

 bristles and greater eyes, and in consequence of these facts Fauvel suggests that such individuals 

 represent the epistocous developed form of the species. This is possible; at any rate all the specimens 

 at my disposal belong to the pelagic and swimming form, and have been taken intermediate, and are 

 captured with the young-fish trawl. The animal is evidently a clever swimmer; several traits in its 

 frame argue this plainly. Among the material in question are found larger as well as smaller speci- 

 mens. While the largest individual has a length of 16 mm. the smallest mesures only 4 mm. 



