a single haul of V 2 an hour witk a net of IP 2 ni in diam., neai 
60° W. and 25° N. According to our present investigations it 
occurs between 15° and 43° N. and between 32 and ca. 75 "W. 
but it has not yet been taken east of 30° W. Long. In the i 
Mediterranean we find a very closely related but not quite 
identical form; of this the greatest number of larvae weie 
taken in the eastern basin (east of Italy). On the othei 
liand, we have larvae from the eastern part of the Gulf of Mexico, 
which differ from the central Atlantic larvae by a lower aveiage | 
number of vertebræ. Thus, in the North Atlantic region we 
have 3 forms of C. balearicus , whose larvae can be distinguished 
by a small average difference in the number of vertebræ. The 
larvae living in the Western and central parts of the W est Atlantic 
have the highest number of vertebræ, whilst in the larvae from 
the European and American Mediterranean (Gulf of Mexico) the 
average is a little lower. Furthermore, we have specimens fiom 
the Southern Atlantic and the Indian Ocean in the older Danish 
collections, and in the collections of the “Albatross from the Phil- 
ippines I have seen quantities of related Leptocephali. Gonger 
balearicus-llke forms must therefore be very widespread in the 
warmer parts of the oceans. 
As our material does not contain smaller larvae of this species 
than 2 1 h cm., it is impossible to determine the position of its 
spawning-places in the Atlantic and even though the various sizes 
of the larvae at different places over the vast region of occurrence 
seem to indicate, that the spawning of the species is restricted to 
certain parts, I prefer to postpone discussion of this question until 
we have obtained more definite data. 
Lastly, I may just briefly refer to a fourth species of 
Leptocephalus, which is represented in our collections by a large 
and valuable material. In old samples dating from Capt. Andréa’s 
time, a Danish Captain who made pelagic collections for the Zoo- 
logical Museum in Copenhagen between ca. 1860 and 1880, as also 
in collections made during recent years for “Kommissionen for Hav- 
