Order Lucernarice. 545 



thickness ; the fibroid bodies diverge from the corners of 

 the camera directly to the outer surface of the layer ; some 

 go to the nearest point in the surface, and others extend 

 to the extreme distance opposite to, and even beyond the 

 middle of a muscle, so that those from two adjoining cor- 

 ners cross each other between the muscle and the surface 

 of the layer, but none of the fibroid bodies go from the 

 muscles to the surface ; on the concave side of the mus- 

 cles the fibroids diverge at all points of the flank of the 

 camera and. crossing each other at all angles, terminate 

 against the proximal face of the muscles : depressions or 

 pockets containing lasso-cells frequent upon the oral side, 

 especially about the base of the arms. Size, three quar- 

 ters of an inch high, including the pedicel. Geographical 

 distribution : Greenland, Fabricius, Steenstrup, Sars ; Lof- 

 foden Is., Norway, Sars, in summer of 1849 ; Eastport 

 Harbor, Maine, Stimpson, August. 



Carduellla* Allman, (1859,) 1860. (Emendat. H. J. C.) 



Disc urnaeform, perfectly circular ; arms none ; pedicel 

 tetracamerous ; tentacles placed in eight distinct equidis- 



* By exchange, for our common Lucernarian, Haliclystus auricula, H. J. C, I 

 have obtained from Professor Allman a couple of specimens of this remarkable genus. 

 Fortunately the specimens are much older than the ones from which he drew up 

 his description, and more in accordance with Sars' representations, and the 

 specimens which he has lately sent to me. It would seem that Allman was una- 

 ware that Sars says that the tentacles are in three rows. " Diese bilden in jedem 

 Biischel etwa 3 unregelmiissige Reihen; bei jungen Individuen, die auch eine 

 geringere Anzahl Tentakeln haben, nur 2 Reihen ; " probably he based his iden- 

 tification upon the Latin diagnosis as copied in Johnston's Zoophytes, 1847, p. 

 475, although even there the " tentaculis saepissime in fasdculis fere continuis 

 ad marginem corporis dispositis;" would hardly warrant him in identifying it 

 with his diagnosis, which says " tentacles capitate, not tufted, springing from 

 ■within the margin of a circular disc in a single series." The italics in both quo- 

 tations are my own. Really Gosse's Depastrum, as he has described it, is more 

 nearly related to Sars' L. cyathiformis than is Allman's Carduella, as the diagnosis 

 now stands; and I myself am very much inclined to believe that Depastrum is an 

 adult L. cyathiformis, whilst I have no doubt that Carduella, as it now is under- 

 stood in books, is the young of tlie latter. See note under Depastrum. 



JOURNAL B. S. N. H. 69 



