Notes on Luvarus imperialis Raf., a fish new to the fauna of Norway. 31 
Supplement: On a young Specimen of Luvarus 
from Mosambique. 
After this work was concluded I have in the magazines of 
the museum found another very young specimen of Astrodermus 
elegans which hitherto had escaped my notice being erroneusly 
labelled Pteraclis ocellatus Cuv. & Val., Mosambique. The spe- 
cimen belongs to the older part of the collections of the Bergen 
Museum and the identification has therefore probably been based 
on the work of Cuvier: “Le Regne Animal. Les Poissons’. On 
plate 66 of this work is, according to explanation of plate, Astro- 
dermus valenciennesi Cocco depicted as fig. 1 and Pteraclis ocel- 
latus Cuv. & Val. as fig. 2, but as on this plate fig. I is placed 
below fig. 2 this may explain how the fish has got the wrong 
name. The specimen corresponds well with the figure given of 
A. valenciennesi (= A. elegans), the coloration not considered as 
my specimen from being kept for years in alcohol has lost its 
colours, the silvery-white ground-colour of the body being the 
only one left. 
The specimen has a total length of about 83 mm., thus being 
considerably smaller than the two specimens previously mentioned. 
In all essentials it is, however, corresponding to these specimens of 
215 and 177 mm., and I shall confine myself to a few supple- 
mentary notes. The length of head and of eye are comparatively 
greater at this stage than in older specimens as will be seen from 
the table on page 30. These are characteristics which are often 
found in a series of young fishes, in other respects too the specimen 
shows its juvenil state. The snout and the ascending part of head 
are half transparent, the forehead rising at a lesser angle than in 
the older specimens (v. text-fig. 6). The central rays of the caudal 
fin are still quite normal. The spinous armourment of the body 
is highly developed, dominating the scaly covering. All over ihe 
body spines are distributed; they are ‘compressed and double- 
pointed, one point directed forwards and one backwards in the 
axis of the body. The basal part of the spines is visible to tlie 
naked eye as round prickles. A row of closely-set backwards-directed 
spines runs on each side of the base of anal and dorsal fin, in 
