A. E. Verrill on Echinoderms and Corals, ete. 93 
The excess in the footing up of the analyses above 100 per 
cent is due to the fact that a part of the iron, estimated as 
protoxyd, is combined with sulphur forming sulphid of iron. 
his meteoric stone is similar in every respect to that which 
fell March 28th, 1859, in Harrison county, Indiana, (which 
locality I see referred to, in catalogues of meteorites, as Harri- 
son county, Kentucky). This meteorite is therefore com- 
posed of 
Protosulpbid of iron,....... 2... gE 
with minute quantities of schreibersite, chrome iron, and prob- 
ably albite. 
In concluding these observations on the Danville meteorite, 
I cannot but feel more and more convinced of the importance 
of a thorough reéxamination of the mineral nature of the 
meteoric stones, and in the present case, I am not at all satis- 
fied that the mineral characteristics are perfectly made out. 
Art. XIIL—Contributions to Zodlogy from the Museum of Yale 
e. No. V.—Descriptions of Echinoderms and Corals from 
the Gulf of California; by A. B. VERRILL. 
THE Museum has recently received a lange and important 
collection of Radiata, collected by Capt. J. Pedersen in the vicin- 
ity of La Paz. The following notes and descriptions relate 
to some of the more interesting species only. 
ECHINOIDEA. 
Meoma nigra Verrill. 
Meoma nigra Verrill, Trans. Connecticut Acad., i, p. 317, 1867._ 
acute at each end, to broad-oval, rounded below and acute 
