Royal Society. 225 
sinuated internally ; secondaries saffron-yellow, with a wider 
brown border ; body tinted with saffron ; otherwise as in the 
male : primaries below almost as in the male, but with six 
marginal yellow spots; secondaries saffron-yellow, with a 
broader brown border. 
Expanse of wings 2 inches 9 lines. 
Hab. Bugaba, Veragua. Type, coll. Druce. 
he ? monstrosa. 
. Smaller and altogether paler than the preceding ; pri- 
sess above white, the apex with a broader and more 
strongly sinuated black-brown border; secondaries yellowish 
white, becoming sulphur-yellow close to the margin, which 
has a broader border than in the preceding species ;_ primaries 
below also paler, excepting at apex, with no apical yellow 
spots, and a more slender discocellular bar ; secondaries with 
broader marginal border and with the orange confined to the 
base of costa. 
Expanse of wings 2 inches 6 lines. 
Hab. Bugaba, Veragua. Type, coll. Druce. 
The above may turn out to be distinct from D. florinda. 
It is not only smaller and different in coloration, but the 
primaries are narrower and their outer margin 1s more di- 
stinctly incurved. Both forms approach D. isandra in form 
and marking; but in the ground-colour of the wings D. 
florinda 3 is like D. polyhymnia, D. florinda 2 more like 
D. leucanthe 2 , and var.? monstrosa like D. pantoporia 3. 
PROCEEDINGS OF LEARNED SOCIETIES. 
ROYAL SOCIETY, 
December uth 1874.—Joseph Dalton Hooker, C.B., President, in 
the Chair. 
“Preliminary Note upon the Brain and Skull of Amphiowxus 
lanceolatus.” By T. H. Huxzey, Sec. R.S. 
The singular little fish Amphiowus lanceolatus has been uni- 
versally regarded as an extremely anomalous member of the Ver- 
tebrate series, by reason of the supposed absence of renal organs 
and of any proper skull and brain. On these grounds, chiefly, 
Agassiz pr oposed to separate it from all other fishes ; ; and Haeckel, 
going further, made a distinct division of the Vertebrata (Acrania) 
