TIMA. 



113 



TIMA EscH. 



Tima EscH. Syst. der Acal., p. 103. 1829. 



Eirene EsCH. {p. p.). Syst. der Acal., p. 94. 1829. 



Diancea Delle Ch. Mem. sulla Stoi-ia e Notomia. 1823- 



Tima Less. Zooph. Acal., p. 333. 1843. 



Tima Agass. Cont. Nat. Hist. U. S., IV. p. 362. 1862. 



Tima formosa Agass. 



Tima formosa Agass. Cont. Nat. Hist. U. S., IV. p. 362. 1862. 



Spherosome greater than a hemispliere, with edges slightly receding 

 from the polar axis, near the circular tube. The disk increases in 

 thickness very gradually to the bend of the chymiferous tubes (Fig. 

 164), where the gelatinous disk extends in a broad cone, slowly dimin- 

 ishing in diameter, tUl it reaches somewhat beyond the level of the veil. 

 This peduncle is contractile, extending at times the diameter of the 

 inner cavity of the bell beyond the circular tube ; the sexual organs 



Fig. 164. Fig. 165. 



extend from the circular tube (Fig. 165) the whole length of the chy- 

 miferous tubes, and nearly to the end of the peduncle ; the four chymif- 

 erous tubes open into a short digestive cavity (c. Fig. 166) ; the acti- 

 nostome is surrounded by four very slender, long, lanceolate, fimbriated 

 lips. {I, Fig. 166.) There are thirty-two long contractile tentacles, 

 seven between every two chymiferous tubes, and one opposite each 

 tube ; the ovaries consist of series of little pouches hanging down on 



Fig. 164. Tima formosa, half natural size. 

 Fig. 165. Quarter-disk, from the abactinal pole ; natural size. 



Fig. 166. Digestive cavity and actinostome. t, termination of chymiferous tube ; c, digestive 

 cavity ; I, one of the four fimbriated lips of the actinostome. 

 NO. II. 15 



