H E P 0 R T 
ON THE 
CONTRIBUTIONS TO THE NATURAL HISTORY OF THE 
ANNELIDES, DURING THE YEAR 1842. 
BY 
PROFESSOR C. TH. Y. SIEBOLD OF ERLANGEN. 
Oersted has rendered much service to the correct knowledge 
of the Annelides, in having described the DorsihrancMata 
of Greenland; and subjected the genus Nais to a more 
minute revision, in regard to the species native in Denmark. 
From his first treatise, “ Udtog af en Beskrivelse af Groenlands An- 
nulata dorsibranchiata, Kroyer, Naturh. Tidsskr. B. 4, Hft. 2, 1842, 
p. 109,” we learn, that O. Fahricius knew twenty-seven Dorsibranchi- 
ata ; and Oersted having added sixteen new ones, forty-three are now 
known in Greenland. Of these, ten species are in common with Den- 
mark, which possesses forty-two; and three with France, which has 
fifty-one species of these animals. In the enumeration of the species, 
Oersted has not only exactly discriminated them, and added their 
synonymes, but he has also given the characters of the genera. 
Of the family of the Aphroditece, five species are enumerated : Lepi- 
clonote scabra, cirrata, and punctata; Polynoe long a ; and Pholoe 
minuta. 
Of Amphinomeoe, he mentions as new Euphrosine borealis, Oerst., 
corpore flavescente ovato-oblongo, segmentis 26-27, eminente capitis 
parte elongato-ovali, tentaculo uno semigloboso, branchiis 9-10 bi-tri- 
partitis, cirro superiore nullo. 
To the Eunicece he adds the Onuphis Eschrichtii, Oerst. ; corpore 
supra convexo, subtus piano, segmentis 50-60, stria transversa fusca 
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