546 Prodromus of the 



tant groups within the margin of the urn, and arranged 

 in rows parallel to the margin, those in one row alternating 

 with those in the next, and successively diminishing in size 

 from the central to the outermost ones ; the radial develop- 

 ment less than the transverse ; between every radial row 

 the oral and aboral sides of the urn are united by a thin 

 septum, so that the interior of the tentacles communicates 

 with the quadrant cameras of the urn, through short radi- 

 ating passages : the marginal anchors are single tentacles 

 whose cavity opens between a pair of septa like those at 

 the base of the tentacles ; they are set up higher and 

 nearer to the edge of the urn than are the tentacles : the 

 approximated genital halves, with their respective claus- 

 tra, extend half way or more toward the edge of the 

 urn, transversely plicate ; the digitiform bodies border the 

 whole length of the bands : pedicel muscles four, alternate 

 with the cameras ; principal muscles of the oral side of 

 the urn pennate, the partitions forming the line of diver- 

 gence ; marginal muscle a single ligulate ring, forming a 

 continuous, thickened projecting brim to the urn, outside 

 the tentacles and anchors : gelatiniform layer conspicuous, 

 varying in thickness in the urn and pedicel. 



Carduella cyathiformis, Allman. 



Carduella cyathiformis, Allman, Rep. Brit. Assoc. 



(Aberdeen 1859), 1860, p. 

 143. 

 " " Allman, Mic. Jour. Trans. 



1860, VIII. p. 125, PI. V. 

 « « Allman, An. Mag. Nat. Hist., 



July, 1860, VI. p. 40. 

 Calicinaria cyathiformis, Edvv. et Haime, Hist. Corall., 



1860, tom. III. p. 460. 

 Depastrum cyathiforme, Gosse, An. Mag. Nat. Hist. 1860, 



June, p. 481. 



