320 Scientific Intelligence. 
it from related types, even from the broad types of Myalina, from 
which the hinge characters shown by Mr. Miller would not sepa- 
rate it. As Meek and Worthen, and still later, Mr. Meek alone, 
have fully described and illustrated these external characters of 
their type, they have given sufficient means for its ss ar ages: 
which even Mr. Miller found no difficulty in doing. To Mr 
ler’s other remarks it is hardly necessary to reply. 
As to the affinities of Ambonychia with the Aviculide, which 
Mr. Miller refuses to admit, on account of the equa ity 0 of the 
e 
in another, the genus Znoceramus being an example. The — 
Sennen typical) Monotis, Halobia, and others are included 
e highest authorities among the Av iculide, and yet the are 
Kee valve. He refers to McCoy as the first to refer Ambonychia 
to the Avinlis. as evidently unaware of the fact that in 1833 
Goldfuss in his great work, Petrif. Germ., did the same. nra 
Woodward, Brown, Dr. Car enter, and "Dr. Stoliezska all have 
done the same, the latter even placing it near Avicula in the sec- 
tion Avicu 
Re ee re Opisthoptera, I will state its synonymy th 
Genus gy aks 10PTERA Meek. Meyaptera Meek an ni Worthen, 1800 
egaptera Gay 18—. Opisthoptera Meek, - 
aie Miller, 18 
9. Costa Rica LT —Mr. W. M. Gabb, in a sited Gated 
San José, Costa Rica, February Ist, corrects his former calculation 
of the height of Piso Blanco, stated on page 199 of this volume, 
oa ee it — ,877°8 feet. ‘The error came from a slip in the use 
of a form 
height 11,356°5 feet. The volcano is extinct, Sane a little 
smell of sulphur in the crater. He further remarks that the peak 
of ee nine or ten vee from Irazu, is so sige eqns to 
10. The Gulp of Mexico in si Miocene.—Prof. Hilgard has 
suggested, in view of the absence of marine Miocene beds over the 
Eocene of Lo yitie bape Mississippi ba Alabama, and the bog 
beds, that “ in the Miocene period, Cuba, like Jamaica and Santo 
Domingo, was much smaller than at present, and may even have 
* This Journal, I, ii, 397. 
