460 Bulletin American Museum of Natural History. [Vol. XXXV, 



Appendix C. 

 Abbreviations and Symbols. 



12' Agz 12-foot Agassiz beam trawl. This was the only kind of trawl used 



this cruise. The runners stand 4 ft. in height and the usual type of 

 net carries a taut headline, making the full opening available. 

 The "reversible" style of this net, for deep-sea work where the 

 possibility of upsetting the frame is great, was not used. 



botm bottom. 



Bt. dredge boat dredge; made of 5-inch webbing, with a bobbinet lining; pro- 

 tected by a canvas apron. Towed by steam launch when used. 



C. S Coast Survey. 



D dredging, or collecting, station. 



dip ordinary dip net on a 12-inch or 14-inch ring, with bamboo handle; 



used extensively in reef fishing with dynamite, and from the gang- 

 way ladder with electric light. 



dyn dynamite. 



e. 1 electric light. 



H hydrographic station. 



H. O U. S. Hydrographic Office. 



hbr harbor. 



K. 1 a small plankton or Kofoid net, made of No. 12 silk, on a 14-inch ring. 



K. 3 same as above, but made of No. 2 silk. 



Lt light. 



Luc. sdr Lucas sounding machine. 



m. b mud bag. This is a bag made of canvas, and sewed to an iron frame. 



It is about 3 feet long and 18 inches wide. It is attached at the tail 

 1-1 of the dredge net. 



wng. b wing bag. This is a circular bag, about 3 feet long, fastened to a 



14-inch brass ring; usually placed at both ends of the trawl, but one 

 was used several times this cruise at the tail of the dredge net, instead 

 of the square mud bag. 



spec specimen. 



3?' Tnr 3^' Tanner beam trawl; was used from steam launch at various 



places when ship was at anchor. 



Tnr.-Blish sdr. .Tanner-Blish sounding machine. 



therm Negretti-Zambra deep-sea thermometer, used with Tanner case. 



wat. bot water bottle. A water bottle was used at each sounding. 



Hand leadline . . this is used from the bow of the ship when approaching an anchorage, 

 or from a small boat to make soundings in proximity of the anchor- 

 age. 



% signifies nets towed astern, from taffrail, side by side. 



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



is expressed by abbreviations, the key to which is appended. It will be noted 



that these abbreviations are arbitrarily capitalized for nouns. When used as adjec- 

 tives, however, the noun abbreviations are not capitalized. 



