THE ANNALS 
AND 
MAGAZINE OE NATURAL HISTORY. 
[FIFTH SERIES.] 
No. 17. MAY 1879. 
XXXVI.— Descriptions of new Species belonging to the Genus 
Solenopus, with some Observations on their Organization. 
By J. Koren and D. C. Danielssen *. 
It is about thirty years since one of us (Koren) first found 
the animal which will be described below under the name of 
Solenopus nitidulus. Koren’s investigations, however, went 
no further at that time than to convince him that it was a 
mollusk; for he had not sufficient material for a more thorough¬ 
going examination. Some years later it was also found by 
our late friend Prof. M. Sars ; but he got no further than 
Koren, having only one specimen at his disposal. Never¬ 
theless he quite agreed with Koren that the animal must be 
referred to the Mollusca. In the course of years we found 
single examples in various localities; and these we submitted 
to investigation, as it was our purpose to produce a mono¬ 
graphic description of this remarkable animal. But the dif¬ 
ficulties in the way of submitting it to a minute anatomico- 
histological examination, combined with the extremely scanty 
material at our disposal, led to our deferring the final working 
up, so as not to furnish a misleading work. During the last 
three or four years Prof. G. O. Sars, who knew that we had 
* Translated by W. S. Dallas, F.L.S., from a separate copy of the 
paper in the ‘ Archiv for Mathematik og Naturvidenskab,’ Christiania, 
1878. 
Ann. & Mag. N. Hist. Ser. 5. Vol. iii. 
23 
