PRONEOMENIA SLUITERI een. ur sp. x. 
WITH REMARKS UPON THE ANATOMY AND HISTOLOGY 
OF THE 
AMPHINEURA 
B} 
Dr. A. A. W. HUBRECHT. 
With four plates. 
It was only in the year 1875 that an interesting genus of inver- 
tebrate animals, of which up to that time only a few undescribed 
specimens in the Bergen Museum, carrying the manuscript label: 
Solenopus nitidulis Sars (26) were known, was first introduced 
into science by the Swedish naturalist TULLBERG (31) and bapt- 
ized Neomenia carinata. TULLBERG supposed it to be somewhere 
intermediate between Mollusks and Worms and reirained from in- 
dieating its nearest relations in either of these groups. In 1877 
Von IHERING (10) places it (together with Chaetoderma) in the 
immediate vieinity of Chiton, in a uew class created for the pur- 
pose, to which he gives the name of the Amphineura and which 
he removes from the Mollusks, arranging it under the Vermes. 
Neomenia was since personally investigated first by L. v. Grarr 
HUBRECHT, Proneomenia sluiteri. a 
