124 



DR. E. L. MOSS ON THE 



we obtained a Bendronotus^ with the right tentacle rudimentary, 

 and an Eolis*. 



In Bessel's Bay the most northern specimens of Oihopleura were 

 captured. These creatures were very common in Smith's Sound. 

 In Payer Harbour, lat. 78° 44;' JST., on 3rd August, 1875, as many as 

 a dozen at a time could be counted floating past in the intensely 

 green w^ater, each enveloped in its " Haus." They were unusually 

 large, measuring as much as 2*5 centims. in length, and the " Haus " 

 about 5 centims. in diameter. The brilliant scarlet contents of their 

 stomachs made them very conspicuous objects. The scarlet matter 

 consisted of various-sized homogeneous globules, identical in ap- 

 pearance with the yelk-substance of certain nidimental ribbons 

 common in the surface-water of Smith's Sound. One specimen of 

 Fritillaria was obtained off" Cape Isabella. Both these genera of 

 Appendicularia are new to Arctic seas, though Oikopleura was 

 originally discovered in Behring Straits. 



The north water of Smith's Sound also abounds in Clio horealis, 

 preying on Limacina and its fry. The Clio fry were belted 

 with one interrupted and two continuous circlets of cilia. 



SagittcB were also common both there and in Baffin's Sea. 

 They differed so slightly.from the universal ^^hipuncfata^^ of Quoy 

 and Graimard, that I include them in that species. They were, 

 however, spineless except for the setae on the lateral fins. In 

 southern Saffitfce the spines, as Mr. Busk observes, are very 

 easily detached, and are often absent in preserved specimens ; 

 but amongst the several large specimens captured uninjured in 

 Melville Bay, I failed to find either spines or the bulbs from 

 which they usually spring. Two varieties were captured, differing 

 only in the shape of the caudal fin : in the one it was continuous, 

 in the other interrupted at the tip. The fins are sometimes 

 different on either side of the same animal. 



It is worthy of remark that the rays of the fins occur in 

 double series closely applied to each other ; one set is some- 

 times seen inclined or bent in a direction not parallel to 

 those above or below. I have since seen this double character 

 in Sagittce from the South Pacific. The cephalic booklets 

 were twelve in number. The anterior denticles of Krohn were 

 four to six, and the posterior eighteen to twenty. The cor- 

 neal cells surrounding the ophthalmic pigment-points formed 



* Since determined as Eolis salmonacea, Couthouy, by Mr. Edgar A. Smith 

 ('Annals and Magazine Nat. Hist.' 1877, xx. p. 140). 



