KONGL. SV. VET. AKADEMIENS HANDLINGAR. 



BAND 



25. 



N:o 



17 



TERMINOLOGY AND SYMBOLS. 



The Terminology einployed in this paper, for the description of the various parts 

 of a Crinoid, has been explained in »British Fossil Crinoids. II. The Classification of the 

 Inadunata Fistulata . Ann. Mag. Xat. Hist. ser. 6, vol. Y, on pp. 312 — 315, April, 1890; 

 in »Suggested Terms in Crinoid Morphology», Ann. Mag. Nat. Hist. ser. 6, vol. IX, pp. 

 51 — 66, January, 1892; and in »Notes on the Anatomieal Noinenelature of Eehinoderms», 

 by P. H. Carpenter, Ann. Mag. Nat. Hist. ser. 6, vol. VI, pp. 1 — -23, July, 1890. It 

 seems nnnecessary to repeat the substance of those papers in this place. It niay, however, 

 be as well to give a table of the Symbols einployed in the present work. 



Cup-plates. IB = Infrabasal. 



B = Basal. 



R = Radial. 



R' = Infer-radial. 



Ii"' = Super-radial. 



R' = Radianal. 



Anal plates. x = First special anal. 



rt = »Third anal», or small tube-plate on right of x. 

 It = Corresponding plate on left. 



Tegminal plates. A 



Ami) 



: Deltoid. 



: Ainbidaeral. 

 IAmb = Primambulac. and so on. 

 iIAmb= Inter-primambulac. and so on. 

 iainl» = Interambulacral. 



Arm-ossieles. 



Br 



= 



Brachial. 





09 



I Br 



= 



Primibrach. 





2 

 £ 



I Br, 



= 



First primibrach. and so 



on 



< 



I ax 



= 



Primaxil. 







II Bi- 



— 



Secundibrach. and so on. 





*— •* 



ll ax 



= 



Seenndaxil and so on. 





ao 



/ 



= 



finials. 





t» 



1 St 



= 



Monostichal. 





c 



1 Ax 



= 



First Main-axil. 





< 



2 St 



r= 



Distichal. 





O 



2 Ax 



= 



Second Main-axil. 





4 St 



= 



Tetrastichal, and so on. 







3 Ax 



= 



Third Main-axil, and so 



on. 



O 



F 



= 



Finials. 





v Vel Ålad. Handl. Bi 



aä 25. 



N:o 



2 





