540 Prodromus of the 



a cruciate figure at its base ; tentacles in groups at the 



end of the arms; anchors none; genitals tubiform with 



blind-sacklike divisions ; pedicel muscles correspond to 

 the four ridges in the camera. 



Craterolophus Tethys. H. James-Clark. 



" Lucernaria. (n. sp. ?) " Mettenheimer loc. cit. ut sup. 

 Disc deeply campanuliform, tapering into a long pedicel; 

 the arms very prominent, equidistant ; the marginal inter- 

 vals or sinuses round : pedicel thick, more than one half 

 as long as the bell, the base large and broad : tentacles 

 slender : genitals extend from the pedicel to the margin of 

 the bell, the approximated halves very close to each other : 

 the margin of the bell is beset by a row of lasso-cell groups 

 or pockets, which extend also in a double row from each 

 of the four corners of the mouth to the marginal sinuses. 

 Size, 14 inches long including the pedicel. Geographical 

 distribution : Heligoland Is.,- North Sea. Mettenheimer. 

 Collected in August. 



? Craterolophus convolvulus. H. James-Clark. , 



Lucernaria convolvulus Johnston Mag. Nat. Hist. January, 



1835, p. 69, fig. 3. ' 

 " " Dujardin in Lamk. An. sans Vert. 



2d ed. 1840, tom. 3, p. 59. 

 L. campanulata Johnst. Brit. Zoiiph. 1838, p. 231, fig. 37, 



(excl. synon. Lamx.) 

 «' « « " « 1847, 2d ed. p. 248, 



(excl. synon. partim.) 

 " " Greene Nat. Hist. Review; Proc. Soc. 



1858, p. 132. 

 Judging from Johnston's figures, as well as his descrip- 

 tion, in the first citation,* the most ostensible ditl'erence be- 



• My cletemiination of the character of this species is based purely upon 

 Johnston's original description, published in 1835, in the Mag. oS'at. Hist. In the 



