50 
over great depths of the ocean, seems to exclude the possibility 
that the species spawns on the bottom, 6000 m. below the surface 
where the larvae were found. 
The four species mentioned with Anguilla vulgaris, Anguilla 
rostrata and Synaphobranchus pinnatus. compose the greater part of 
our material. from the North Atlantic region. Postponing meanwhile 
an account of the. biology and distribution of the last 3 species I 
may sum up our results regarding the distribution of the other 
four. According to the foregoing C. balearicus belongs apparently 
to the western region (west of 30? W. Long.), though a form very 
closely related to it occurs in the Mediterranean. In regard 
to the others, C. mystaæx is apparently restricted to the Mediter- 
ranean and adjacent parts of the Atlantic and our investigations with 
the ”Thor” show that it spawns in the Mediterranean in summer 
and autumn. C. vulgaris propagates both in the Mediterranean and 
in the eastern part of the Atlantic between 30” and 40”? N. Lat. 
but not off the shores of the British Isles or France, nor further 
to the north or east; we may thus conclude that the Conger living 
here, like the fresh-water eel, migrate south- and westwards in order 
to spawn in warmer and salter water than they live in during their 
years of growth. All the information obtained from our present in- 
vestigations show that Conger vulgaris has a rather restricted 
spawning-time in spring and summer. 
L. lanceolatus occurs both in the western, central and eastern 
parts of the Atlantic between ca. 25? and ca. 35? N. L., where it is 
born in the central, deep parts of the ocean — a fact which also applies 
to L. ingolfianus and most likely to many other murænoid species. 
On the other hand my investigations in the Mediterranean 
have shown that the dogma put forward by Grassi that all Murænoids 
spawn in deep water (at least 500 m.) cannot be maintained. Ås 
and distant pigment patches sublaterally in the front part of the 
body. For this form I propose the name L. Andreæ in honour of 
the late Danish captain who collected such a valuable material of 
Leptocephali. 
