REV.- A. M. NORMAN ON CYANEA IMPORCATA. 59 



drawing from the living animal, from which the plate which 

 illustrates this paper has now been engraved, and the notes 

 which form the basis of the following description were at the 

 same time taken by myself. 



Class. HYDKOZOA. 



Order. DISCOPHOKiE. Agassi*. 



Fam. CYAKEID^E. Agassiz. 



Genus. CYANEA, Teton. 



Cymiea imporcata, n. sp. PL XI. 



The hydrosoma is inverted cup-shaped, moderately convex, 

 about four and a half inches in diameter, tinged with deeper and 

 paler shades of indigo blue, the colour being disposed as will be 

 presently described. The margin is divided into eight principal 

 lobes, each of which is again subdivided into four lesser lobes, so 

 that the whole circumference of the hydrosoma is festooned in 

 thirty-two lobes. The disk is elevated into sixteen radiating 

 ridges, with as many intermediate furrows. A radiating canal (?) 

 of an intenser blue than the rest of the hydrosoma passes down 

 the centre of each of the ridges, and gives forth numerous 

 obliquely divaricating secondary canals (?) which pass down the 

 slopes of the ridge on either side towards the furrows. The 

 radiating ribs and their canals terminate at the margin in the 

 greater sinuses and in the central sinuses of the greater lobes. 

 Each furrow on the other hand is traversed by a white line and 

 terminates in a lateral sinus of the greater lobes. The obliquely 

 divaricating transverse branches which proceed from the blue and 

 elevated canals and pass down the slopes of the ridges to near the 

 base of the furrows are likewise to be recognized by the deeper 

 tint of blue which marks their course. 



There are no tentacles on the margin, but, situated on the 

 under surface of the hydrosoma, at a short distance within the 

 margin of each of the principal sinuses, there is seen a semicircle 

 of about forty crowded, simple tentacles, of a yellow colour. 

 These tentacles are so short, that they scarcely appear below the 



