49 
undersøgelser” by various Danish ships, there occurs a characteristic, 
small Leptocephalus which at first glance resembles L. brevirostris. 
The resemblance is however quite superficial and there can be no 
question of. relation. Fig. 7 shows the external appearance; it will 
be seen that the tail is pointed and the snout much longer than 
in L. brevirostris. Furthermore, the myomeres have quite a different 
shape and there is pigment on the tail. An examination of 
Stråmman's type specimens of Leptocephali has convinced me 
that it must be identical with his Z. Janceolatus, though this cannot 
be recognized from his description. The present species has ca. 
160 myomeres of which ca. 88 are preanal and my specimens vary 
in length from ca. 1 to ca. 6 cm. Stråmman's largest specimen 
was 33 mm. and not full-grown. The distribution is seen from the 
Chart (p. 44); it has been found west of 30? W. Long., like C. 
balearicus, but also in the deep, eastern part of the Atlantic near 
30% N. L. A point of special interest is the discovery of larvae 
1 cm. long in the central, deepest parts of the Atlantic. 
These show that the species must spawn out here, as larvae of 
1 cm. in length cannot have drifted very far from the spawning- 
places"), Further, the discovery of such early larvae at the surface 
1) The same is the case with a species of  Nettastoma from the 
Atlantic and with a species for which I propose the name Lep- 
tocephalus ingolfianus. As may be seen from the figure 8 it 
resembles C. mystaæ in shape, but is somewhat higher, and is easily 
distinguished from this in lacking the pigment row along the gut. 
(In L. ingolfianus pigment is only present near and at the end of 
the tail.) The number of vertebræ is also different exceeding 150 in 
L. ingolfianus. (In one specimen 79 mm. long I found 118 + 35 = 
158 and in a smaller 120 + 35 — 155.) The present specimens 
measure from ca. 1 to ca. 3 cm. in length and have been found in the 
Atlantic SW of the Azores, at the surface over a depth of more than 
3000 m.. (329 03" N., 399 00' W). 
I am unable to say whether another species whose larvae occur 
in our collections (see fig. 9) and which is related to Stromman s 
L. tiluroides, also propagates in the deep parts of the Atlantic like the 
parents of L. lanceolatus and ingolfianus, as we have not obtained 
specimens less than ca. 7 cm. in length. Is has about 250 preanal 
vertebræ and is further characterised by the presence of ca. 4 large 
Vidensk. Meddel. fra den naturh. Foren. Bd. 64. 4 
