194. MR.J.¥. JOHNSON ON NEW MADEIRAN CORALS. [June 24, 
ventral fin. Teeth very small, subhorizontal, in a single series. 
Cleft of the mouth oblique, rather wide, the maxillary extending to 
behind the eye; lower jaw prominent; eye very small. Ventral 
fins confluent ; caudal arrow-shaped, nearly one-fifth of the total. 
Pectoral as long as the ventral, and half as long as the head. Upper 
parts grey, lateral and lower silvery ; an ovate grey spot before each 
dorsal ray ; caudal grey. 
Four specimens of this fish have been procured for the British 
Museum. The largest of them is 93 inches long. 
This is the most aberrant form of the genus Amblyopus ; although 
closely allied to 4. broussonetii, it differs in its more feeble dentition 
and in its larger scales. 4. broussonetii has 11/16 vertebree, A. sa- 
gitta 11/20. If the genus Gobioides of Lacépéde be adopted, another 
must be created for A. sagitta, and the sections may be arranged as 
follows :— 
Amstyopus, Gthr. 
A. Teeth in a band, with an outer series of stronger ones. 
* More than twenty-five soft dorsal rays: Amb/yopus, C. & V. 
Fast Indies. 
* Less than twenty soft dorsal rays: Gobioides, Lacép. Peru 
and Guayaquil. 
B. Teeth in a single series: Tyntlastes. California. 
3. Descriptions oF somME New Corats rrom MApEIRa. 
By James Yate Jouwnson, Cor. Mem. Z.8, 
Fam. ACANTHOGORGIADA, J. E. Gray. 
ACANTHOGORGIA ATLANTICA, Sp. Nn. 
Since the occurrence of a specimen of Acanthogorgia grayi, of 
which I laid a description before the Society last year (Proc. Z. 8. 
1861, p. 296), another form of the genus has been discovered. This 
was brought up from deep water at Madeira, having become entangled 
in a fisherman’s line. As there are obvious distinctions from the 
two other species of this genus, I shall venture to describe it as new. 
It is of a dark-brown colour, and is very sparingly branched in 
one plane. The base spreads out in thin branching sheets amongst 
small shells and fragments of stone which adhere to it. The stem 
and branches, with their closely packed cells, are cylindrical, the 
former not much thicker than the latter. The branches are rounded 
at their extremities. The cells are short, cylindrical, sessile, and so 
crowded on all sides of the stem that they conceal it from view ; 
whilst in the two other species of this genus the cells are widel 
separated, and the bark is seen between them. When the polypi- 
dom is dry, a brown, slender, horny axis, without spinulz, stands 
distinct from the bark, as in the other species. This axis, when soft- 
ened and submitted under pressure to the microscope, is seen to 
