CORONAT/E PERIPHYI,I,A, FKRirHVLLOPSIS. 



547 



records a specimen lully as hi^h as wide. According to him, the pedalia are rectangular and 

 longer than wide, but according to Maas, 1897, they are nearly circular in outline. The 

 tentacles are said to be short and thick, and the stomach verv large and wide, but these points 

 as well as the proportions of the bell, are probably affected largely by growth and contraction. 



Found on the bottom of the Pacific and Atlantic from the Antarctic regions to the tropics. 



It is the largest form of Periphylla and may become 200 mm. wide. 



Genus PERIPHYLLOPSIS Vanhofifen, 1900. 



PerlplnUopsis, Vanhofff.n, 1900, Zool. Anzeiger, Bd. 23, p. 178; lqo2, Wisscn. Ergeb. deutsch. Tiefsec Exp.-d., Valdivia, Bd. 3, 

 Lfg. I, p. 27— Maas, 1907, Ergeb. und Fortschrittc der Zool., Bd. 1, p. 195.— Bigelow, H. B., 1909, Mem. Mus. Comp. 

 Zool. at Harvard College, vol. 37, p. 27. 



The type species is Pcriphyllopsis braucri Vanhoffen, of the Indian Ocean; from a 

 depth of 1,200 fathoms. 



GENERIC CHARACTERS. 



+ interradial rhopalia, 4X5 (20) tentacles, 4X6 (24) lappets. 



Periphyllopsis braueri Vanhoffen. 



Pcriphyllopsis braueri, Vanhoffen, 1902, Wissen. Ergeb. deutsch. Tiefsee Expedition, Dampfcr FaUivia, Bd. 3, Lfg. i, p. 27, 

 taf. 2, fig. 7.— BifiELow, H. B., 1909, Mem. Mus. Comp. Zool. at Harvard College, vol. 37, p. 28, plates 9 and 12.' 



Vanhoffen's single specimen was so imperfect that he could not venture to present a 

 detailed description of it. Recently, however, Bigelow describes a more nearly perfect specimen 



Periphyllopsis braueri. 



Fig. 345. — .\fter Vanhoffen, in Valdivia Expedition. .Aboral view of bell. 

 Fig. 346. — With the walls of the stomach torn away leaving only its base with the gastric cirri. 

 .Vter H. B. Bigelow, in Mem. Museum Comp. Zool. at Harvard College, 1909. 



from the collections of the Albatross, and the account here given is mainh" derived from his 

 description. 



Bell flattened, 60 mm. wide and 25 mm. high, resembling an AtoUa in shape. Central 

 disk about 50 mm. wide; ring-furrow deep. 4 interradial rhopalia, 24 (4x6) ovate marginal 

 lappets, and 20 (4x5) tapering tentacles, about as long as the bell-diameter. Thus the radial 

 arrangement ot the various organs is the same as is seen in Pcriphylla, only the numbers of 

 lappets and tentacles being greater. The ring-muscle of the subumbrella is very weak as in 



