120 FIELD COLUMBIAN Museum — GEo.tocy, Vo t. III. 
ite and probably a mesosiderite. The error of notation would not 
have been significant but for the fact that the accompanying de- 
scription was copied by Cohen* in his account of the brecciated hexa- 
hedrites. Under the name of Mejillones two masses of different char- 
acters are now to be found in collections, as was early noted by Meu- 
nier.t Meunier recommended the name of Pseudomejillones for the 
iron-stone fall. As such a nomenclature would, however, not be in 
accordance with present usage it would seem sufficient to designate 
one as Mejillones, iron, and the other as Meyjillones, iron-stone, at least 
until some further information can be obtained regarding the origin 
of the masses. It is not impossible, indeed, that they may be parts of 
the same mass with different structures, as occurs in many pallasites. 
Of Mejillones, iron, but a small quantity seems to be known. Of the 
specimens listed by Wulfingt under this name, those of Harvard and 
Ward are iron-stone. The Harvard specimen was obtained by pur- 
chase from Ward and Howell§, as was also the specimen in this Muse- 
um. Excluding these it leaves the specimen in the Paris collection as 
perhaps the only well-authenticated one of the Mejillones iron. This 
specimen according to Meunier was received from Domeyko. 
MODOC. 
This meteorite has already been made the subject of a brief note and 
detailed study § by Merrill anda note by the present writer.** Some 
additional facts obtained by the writer during a visit to the locality in 
February, 1906, and by study of specimens seem worthy of record. 
These observations include accounts of the phenomena of fall obtained 
from various residents of Modoc, also at Tribune, forty miles west of 
Modoc. ‘The accounts at the latter place show a much shorter interval 
to have intervened between light and sound than at Modoc. This 
seems conclusive evidence that the meteor exploded over Tribune and 
traveled about forty mules before falling. The accounts here given 
are arranged in the order of the position of the observers going east- 
ward. 
Mr. Raines, the station agent at Tribune, was about to lower a cur- 
tain at an east window when he saw the meteor at the north going 
* Meteoritenkunde, Heft III, p. 233. 
+ 1893. Revision des fers meteoriques, p. 75. 
t Die Meteoriten in Sammlungen, p. 230. 
§ Huntington, Catalogue of all recorded meteorites, 1887, p. 93. 
| -Sctence 1906;°N. So XX po gor. 
4] Am. Jour. Sci. 1906, (4): 21, pp. 356-360. 
** Science 1906, N.S. XXIII, p. 582. 
