314 
ELAINEA RIISII, sp. nov. 
Fuscescenti-olivaceus : pileo cristato intus albo: loris albescen- 
tibus, alis nigricantibus, primartis olivaceo stricte, secundariis 
et tectricibus flavicanti-albo latius marginatis: cauda nigri- 
canti-fusca, marginibus externis olivacescentibus ; subtus cine- 
racescenti-albus, abdomine flavido lavato : rostro superiore ob- 
scure corneo, inferiore rubello, pedibus nigris. 
Long. tota. ale. caude. 
Spec. a, 5, 5°4 3°0 2°7 
b, 2, 50 2-7 2-2 
tC 5 | 2°8 
ey 6:0 2°9 2°7 
—- @, Ory 2°8 Ana 
— f, 5°8 3°0 2°8 
ys 5°8 3°0 2°8 
Hab. In ins. 8. Thome Antillensium. 
Mus. P.L.S. 
Oés. Affinis Elainee pagane et ejusdem forme, sed rostro lon- 
giore, compressiore, et corpore subtus pallidiore distinguenda. 
I have specimens of two species of this genus of Tyrannide in my 
collection from Jamaica. One of them is Z#. cotte of Gosse; the 
other, as far as I know, undescribed, but quite different from the 
present. I have also an Elainea from Tobago, which I cannot refer 
strictly to any known species. 
5. On THE AFRICAN TRIONICES WITH HIDDEN FEET (EMyDA). 
By Dr. J. E. Gray, F.R.S., V.P.Z.S. 
There have been five species of my genus HLmyda, which MM. 
Duméril and Bibron afterwards most unnecessarily named Cryptopus, 
described as found in Africa, viz.— 
1. Cryptopus senegalensis, Dum. & Bib., from Senegal. 
2. Cyclanosteus petersii, Gray, from the Gambia. 
3. Cyclanosteus frenatus, Peters, MSS., from Mozambique. 
4. Cryptopus aubryi, Duméril, from Gaboon. 
5. Aspidochelys livingstonii, Gray, from Mozambique. 
Now it is very doubtful if several of these names are not synony- 
mous, not because there is any doubt as to the distinctness of 
species, as some neophyte belonging to the Darwinian School might 
suspect, but simply because the materials on which they are founded 
do not afford us sufficient information or means of comparison. 
Cryptopus senegalensis was described from a very young specimen 
in the Paris Museum before it had any of the sternal callosities de- 
veloped. The specimen of Trionyz, with flaps over its feet, which 
we have received from the same locality, is unfortunately in the same 
condition ; and though it affords very good evidence that it is desti- 
tute of any bones on the margin of the shield, and therefore does not 
