TIMA. 



113 



TIMA EscH. 



ThnaEscn. Syst. der Acal., p. 1(»3. 1829. 



Eirene EscH. (p- p-)- Syst. der Acal., p. 94. 1829. 



Diaiuea Delle Cm. Mem. snlla Storia o Nntoniia. 1823-29. 



Tiiita Less. Zooph. Acal., p. 3.}3. 1843. 



Tima Ar.A.-is. Cont. \at. Hist. V. S., IV. p. 302. 18C2. 



Tima formosa Agass. 



Tima formosa Agass. Cont. Nat. Hist. U. S., IV. p. 3C,2. 1862. 



Spherosome greater than a hemisphere, 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 hjoad cone, slowly dimui- 

 ishing in diameter, till 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. 



extend from the circular tube (Fig. 165) the whole lengtli 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. (/, 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. ^ termination of chjTiiiferous tube : c, digestive 

 ea\nty ; /, one of the four fimbriated lips of the actinostome. 

 xo. II. 15 



