48 



DACTYLOMETRA. 



Pelagia Brandtii Agass. 



Pelagia Brandtii Agass. Cont. Nat. Hist. U. S., IV. p. 164. 1862. 



Pelagia denticulata Br. {non Per. et Les.). Mem. Acad. St. Pet., p. 383, PI. 14, Fig. 2. 



Aleutian Islands (Mertens). 



DACTYLOMETRA Agass. 



Bactrjlometra Agass. Cont. Nat. Hist. U. S., IV. pp. 125, 166. 1863. 

 Chnjsaora Esch. {p- p-)- Syst. d. Acal., p. 78. 1829. 



Dactylometra qtiinqtiecirra Agass. 



Dactylometra quinquecirra Agass. Cont. Nat. Hist. U. S., IV. pp. 125, 166. 1862. 

 Pelagia quinquecirra Des. Proc. Bost. Soc. N. H., p. 76. 1848. 



Mr. Desor has described, in the Proceedings of the Boston Society of 

 Natural History, a Pelagia under the name of P. quinquecirra ; as his 

 description is hardly sufficient to enable one to recognize it, I add 



the following particulars, on the 

 supposition that the Pelagia which 

 I found at Naushon is identical 

 with the one described by Mr. 

 Desor. 



Several specimens of this Pela- 

 gia were taken at Naushon, the 

 disk measuring from four to eight 

 inches in transverse diameter, and 

 one and a quarter to two inches in 

 height. The general color of the 

 disk is yellowish blue, the surface 

 being covered with reddish-brown 

 spots (Fig. 69), crowded more 

 thickly towards the abactinal pole. 

 The spotted surface does not reach 

 the margin of the disk ; only dot- 

 ted hues extend from the lobes un- 

 tU the}^ are lost in the more numer- 

 ous spots of the central part. The 

 marginal tentacles have the same 

 color as the spots of the disk. 

 There are five between each of the eight eyes, arranged, one, the 

 largest, in the middle of the broader central lobe, and one on each side 



Fig. 69. Dactylometra quinquecirra Agass. one foui-th the natural size. 



