FISHES, ETC. OF THE “NASSAU” VOYAGE. 471 
TRACHYPTERIDA. 
18. TRACHYPTERUS ALTIVELIS, Kner. 
A specimen of this species was taken, in the seine, at Luco Bay, Araucania. 
ATHERINIDA. 
19. ATHERINICHTHYS LATICLAVIA, Cuv. et Val. 
This species, from which the 4. microlepidotus appears to be very doubtfully distinct, 
was frequently taken in the seine in the Strait of Magellan, at Punta Arenas, Port 
Famine, and Port Gallant, often occurring along with Æleginus maclovinus. It pos- 
sesses an extremely delicate flavour. 
20. ATHERINICHTHYS ALBURNUS, Günth. 
Specimens of this species were taken at Punta Arenas. In common with some of the 
other species of the genus, it is generally met with where there is a considerable admix- 
ture of fresh with salt water. 
21. ATHERINICHTHYS ARGENTINENSIS, Cuv. et Val. 
. Many specimens, I believe, referable to this species were taken in the seine at Mal- 
donado; and one was sent home, preserved in spirit; but I have not come across it at 
the British Museum. 
: GOBIESOCIDÆ. 
22. GOBIESOX, sp. 
Many specimens of a small species of this genus, but in an immature condition, were 
taken, along with Blennius gentilis, on the screw of the * Nassau,' at Rio de Janeiro, in 
August 1867. 
CENTRISCIDÆ. 
23. CENTRISCUS GRACILIS, Lowe. 
A small specimen of this species was taken in the towing-net, between Monte Video 
and the Strait of Magellan, in November 1867. 
LYCoDIDA. 
24. LYCODES LATITANS, Jenyns. 
This species was not uncommonly met with in the Strait of Magellan and western 
channels, lurking under stones. It is difficult to catch, from its eel-like motions and the 
slipperiness of its scaleless skin. 
: MAYNEA, g. n. 
Body elongated, compressed. Skin with small spherical imbedded scales, with interspaces between them. 
Dorsal, caudal, and anal united. Ventrals absent. Jaws equally armed anteriorly with minute 
teeth placed rather far apart. A few minute teeth anteriorly on the vomer and anteriorly on the 
palatine bones. A row of large open pores along upper and lower jaws, and a few rather smaller 
ones on the cheeks. Six branchiostegals; gill-opening narrow, the gill-membranes being attached 
to the isthmus ; pseudo-branchie present. No pyloric appendages. 
