236 MR. G. BUSK OK THE POLTZOA 



1867, pp. 24 & 151, tab. xxvi. figs. 140-146 ; Norman, * Valorous 1 

 dr edgings. 



Eschara saccata, Bush, Ann. N. Hist. ser. 2, vol. xviii. p. 33, pi. 1. fig. 1 ; 

 Sars, I. c. 1862, p. 6. 



Hah. Cape Napoleon, Cape Fraser, Aug. 11, 1875 (R. W. F.); 

 Norway and Finmark (Jf Andrew) ; Spitzbergen, Greenland, 

 Finmark, 30-60 fms. {Tor ell, Loven, Sars) ; Newfoundland (D'Or- 

 higny); Hare Island, "Waigat Straits, and lat. 66° 59' N., long. 

 55° 27' "W., 57 fms. {Norman, ' Valorous ' Dredgings). 



As Professor Smitt states that he has compared specimens from 

 the Arctic Seas w r ith the type specimen in M. d'Orbigny's col- 

 lection at Paris, there can be no doubt of the right to priority of 

 D'Orbigny's designation. But I would remark that in none of 

 the specimens of E. elegantula that have come under my notice 

 have I observed the larger size of the lateral cells alluded to by 

 the French naturalist as characteristic of the Newfoundland 

 species. 



The species is not mentioned by Mr. Hincks in his account 

 of Dr. "Wallich's collection from Iceland and Labrador ; but I 

 have several specimens received from Dr. Wallich, though from 

 what precise locality is not recorded. The only indication placed 

 upon them is " Arctic Sea, 100 fms." 



2. Eschara pebptjsilla, n. sp. PI. XIII. fig. 5. 



Zoarium diminutive, constituted of irregularly forked branches. 

 Stem and lower part of branches cylindrical, towards the ends 

 flattened. Zocecia fusiform, elongate ; mouth looking directly 

 upwards (horizontal) ; anterior lip tridentate, the median denticle 

 wide and expanding, the lateral pointed, conical ; immediately in 

 front of the median denticle an avicularium about half the length 

 of the zocecium, with a circular mandible, which opens upwards 

 and backwards. 



Hab. Arctic Sea, Aug. 11, 1875, 13-15 fms. ; Franklin-Pierce 

 Bay, Smith's Sound {R. W. F.). 



At first sight this form might be regarded as a very dwarf 

 variety of E. elegantula, from the circumstance that in the mature 

 condition the zocecium has an avicularium in the same situation 

 as the organ it occupies in that species. But further examina- 

 tion shows that the two forms are, in other respects, quite 

 distinct. 



The characters by which E. perpusilla may be recognized 

 are : — 



