HANDBOOK OF THE METEOEITE COLLECTIONS. 3 



2. Chassignite (Cha) : Consisting essentially of olivine and a little 

 chromite; structure crystalline granular. 



3. Chladnite (Chi) : Consisting essentially of a rhombic pyroxene; 

 structure crystalline granular. 



4. Amphoterite (Am) : Consisting essentially of olivine and bronz- 

 ite with a little iron sulphide and nickel-iron; structure sometimes 

 granular, sometimes chondritic. 



G . Meteorites rich in magnesium minerals and consisting essen- 

 tially of olivine, bronzite, nickel-iron, and iron sulphide, with a 

 fragmental or tuff-like base and chondritic structure. 



1. Howarditic chondrite (Cho) : A group intermediate between the 

 chondrites and achondrites. 



2. White chondrites : Consisting of a yellowish-white tuf aceous base 

 with chondrules mostly of the same color. This group is divided into 

 three subgroups : (a) White chondrites (Cw) ; (5) veined white chon- 

 drites (Cwa), and (c) breccia-like white chondrites (Cwb). 



3. Intermediate chondrites : A group including forms intermediate 

 between the white and the gray chondrites. This group is divided 

 also into three sitfegroups: (a) Intermediate chondrites (Ci), (&) 

 veined intermediate chondrites (Cia), and (<?) breccia-like interme- 

 diate chondrites (Cib). 



4. Gray chondrites : Consisting of a yellowish to a bluish-gray tuff- 

 like base, with variously colored chondrules which are firmly em- 

 bedded in the groundmass. The group is divided into: {a) Gray 

 chondrites (Cg), (&) veined gray chondrites (Cga), and (<?) breccia- 

 like gray chondrites (Cgb), 



5. Black chondrites: Consisting of a dark gray to black, firm 

 chondritic mass, the color of which is due in part to carbon and in 

 part to iron sulphide ; chondrules mostly of a light color. 



6. Spherical (Kiigelchen) chondrites: Consisting of numerous 

 hard and well- formed chondrules in varying proportions, in a 

 tuff-like or crystalline ground, sometimes so loosely imbedded as to 

 break away from the ground and sometimes breaking with it. This 

 group is divided into five subgroups, as follows: {a) Ornansite and 

 Ngawite (Ceo and Ccn) ; (6) spherical or Kiigelchen chondrites 

 (Cc) ; ((?) veined Kiigelchen chondrites (Cca) ; {d) breccia-like 

 Kiigelchen chondrites (Ccb) ; (e) crystalline Kiigelchen chondrites 

 (Cck). 



7. Crystalline chondrites: Consisting of a crystalline groundmass 

 with firmly imbedded chondrules. The group is divided into three 

 subgroups: {a) Crystalline chondrites (Ck) ; (6) veined crystalline 

 chondrites (Cka) ; (c) breccia-like crystalline chondrites (Ckb). 



8. Carbonaceous chondrites (K and Kc) : This includes a group 

 of chondritic stones impregnated with carbon and containing little 

 or no iron. 



