DREDGING AND HYDROGRAPHIC RECORDS. 



"Character of bottom," determined by the specimens from the 

 sounding cup, is expressed by abbreviations, the key to which is ap- 

 pended. It will be noted that these abbreviations are arbitrarily 

 capitalized for nouns. When used as adjectives, however, the noun 

 abbreviations are not capitalized. 



bk.... black. fne fine. M Mud. sctrd. . .scattered. 



bl blue. For. . . Foraminifera. mrgn.. .marginal. Sh Shells. 



br brown. G Gravel. Mas Masses. sml small. 



br-gn. .brownish-green. Glob . . Globigerina. Oz. . . . Ooze. Sp Specks. 



brk broken. gn.... green. P Pebbles. St Stones. 



C Clay. gn-br. .greenish-brown. Ptr Pteropod. vol. .. .volcanic. 



Clmps. Clumps. gn-gy.. greenish-gray. R Rock. W Seaweed. 



Co Coral. gy. . . .gray. Rf Reef. wh white. 



era coarse. hrd. . .hard. rky rocky. 



dk dark. Lav Lava. S Sand. 



