70 MR. E. J. MIERS ON GREENLAND CRUSTACEA. 



obtained of a Danish sailor at Umenak, who stated that they were 

 parasitic on the nose around the horn, and that they were found 

 only at Umenak ; but this is certainly erroneous. 



Ctamus monodontis. 



Cyamus monodontis, Lutken, I. c. p. 256, pi. i. fig. 2 (1873). 



This species, like the C. nodosus, is parasitic on the Narwhal, 

 but only a few specimens obtained with the preceding have been 

 preserved. These are very easily to be distinguished by the 

 broader, more flattened segments of the body, which are not 

 roughened and longitudinally sulcated as in C. nodosus, and the 

 coxae of the joints of the fifth to seventh legs are not armed with a 

 spine as in that species. Some of the examples collected are, more- 

 over, larger than any of C. nodosus obtained by Mr. Whymper. 



Phxllopoda. 



Branchinecta arctica. 



Branchipus (Branchinectus) arcticus, Verrill, Amer. Journ. Sci. $• 

 Arts (ser. 2), xlviii. p. 253 (1869) ; Miers, Ann. 8f Mag. Nat. Hist. 

 (ser. 4) xx. p. 105, pi. iv. fig. 1 (18/7). 



Branchinecta arctica, Packard in Hay den, U. S. Geol. fy Geogr. Survey, 

 p. 621 (1874) ; Amer. Naturalist, xi. p. 53 (1877). 



A good series of specimens, males and females (several fully 

 grown), were taken by hand by Mr. Whymper in stagnant pools 

 near Grodhavn Harbour. They agree very well with Verrill' s 

 original description (which I had not seen when I wrote the 

 Eeport on the Crustacea of the Arctic Expedition last year) ; the 

 second joint of the claspers in the male are bluntly pointed at the 

 tip. They are even larger than the specimens collected by Verrill, 

 attaining a length of 23 millims. 



The examination of this series has shown that of the few in- 

 dividuals collected at Discovery Bay, none are nearly fully-grown, 

 nor are there any females among them. It is not impossible 

 that they may prove to be a distinct species, as suggested by me 

 in my Report, on account of the straighter claspers (the basal 

 joint of which has fewer teeth, and the second is less slender), 

 the shorter, broader-lanceolate caudal appendages, &c. ; but more 

 and larger specimens are needed for comparison. In the specimen 

 figured by me the male genital appendages are incorrectly drawn. 

 The ovary is very long and narrow, considerably exceeding half 



