ZOOLOGICAL MUSEUM, TRINO. 
57 
Herring group, and we also see the Salmon and Pike 
(some large specimens of the latter from Tring Reser- 
voirs). Of more interest, however, is the peculiar 
Silvery Hair-tail {Trichiurus lepturus), and the Scab- 
hard-fish or “Frost-fish” of the New Zealand colonists 
{Lepidopus caudatus), a deep-sea fish, said to come 
ashore on frosty nights, and being much valued for 
the table. This species is widely spread, and has 
even occurred on the southern shores of England. 
We are now coming to the last fish case, in which a 
number of fishes of most peculiar outward appearance 
are on view, as well as others of most singular internal 
structure. The former are the Plectognathous fishes, 
such as the File-fishes (Balistes), the Trunk-fishes 
{Ostracion), the Balloon-fishes {Tetrodon), and also 
the gigantic Sunfish {Orthagariscus mola), of which a 
far larger specimen is suspended opposite the Halibuts. 
Of special interest on account of their anatomy are 
the Dipnoi, fishes which have lungs as well as gills. 
Of these the best known is perhaps the “ Lepidosiren ” 
{Protopterus annectens), which is very common on the 
West Coast of Africa. This fish passes the dry season 
sleeping in the mud, if living in ponds which dis- 
appear after the rains. Another much rarer fish of 
this suborder is the true South American Lepidosiren 
(L. paradoxa), a magnificent specimen of which is 
to be seen in a glass tube. This was brought 
home from Paraguay by Dr. Bohls, who captured a 
great many specimens, while formerly they were the 
