10s Canadian Arctic Expedition, 1913-18 



We have, therefore, as yet but one species of the genus; and it is a very 

 characteristic form of shallow water of rather low salinity in the arctic. It is 

 entirely circumpolar, having been reported from the White sea and Novaya 

 Zemlya (Redikorzew, 1916), Franz Josef land (Hartmeyer, 1911), New Siberian 

 islands, several points along arctic coast of Siberia and Okhotsk sea (Redikorzew, 

 1916), both southern and northern Alaska (Ritter, 1901, and listed above), 

 Canadian arctic coast at Herschel island (Huntsman, 1913), and Bernard 

 harbour (listed above), James bay, (Huntsman, 1922), Baffin bay (Hartmeyer, 

 1903) and north east Greenland (Hartmeyer, 1910). In addition I have examined 

 material of this species collected by E. M. Kindle in Hamilton inlet, on the 

 coast of Labrador in 1921. 



Johansen has made the following notes regarding the occurrence of this 

 species at Collinson point, Alaska (Station 27 d) : "A part of the shore is formed 

 by the tundra, and the gravel on the beach and an the adjoining shallow water is 

 covered by a thick layer of tundra debris. This particular part of the littoral 

 region, in depth from one-half to about three feet, seems to be a veritable 'hot- 

 bed* for a ball-shaped Ascidian, which has its roots attached to the debris or 

 among the gravel, but which I did not find in the littoral region outside this 

 particular bottom. Dead, shrunken individuals of the same species were 

 common washed up on the beach up to high-water mark, and had probably been 

 torn loose by the waves." 



Kiikenthalia boreaiis (Gottschaldt) 



1903. HARTMEYER, p. 260. 



1921. ARNBACK-CHRISTIE-LINDE. 



West coast of McClintock island, Franz Josef land, (80 22' N. lat.), July 

 1902, Baldwin-Ziegler expedition, U. S. Nat. Mus. no. 6640, 1 colony. 



This species has hitherto been known from Davis strait, Iceland, Norway, 

 Murman coast, Bear island, and Spitsbergen. 



Styelopsis sp. (?) 



Station 43 c, 1 specimen. Station 50 d, 1 specimen. 



The two specimens are approximately 2 mm. long and 1 mm. high. As 

 they are immature and their structure cannot be fully determined, it would 

 seem unwise to name them specifically, even though they seem to differ from 

 any described form. 



In the first specimen the surface is covered with scattered sand grains. 

 The apertures are at either end of the free surface on short siphons and seem 

 both to be 4-lobed. The test is thick and translucent. The musculature is 

 well developed and consists of the two usual layers. The oral tentacles are 

 simple and short. The dorsal lamina is toothed. There are five longitudinal 

 bars on each side. No atrial tentacles have been found. The stomach is 

 horizontally placed on the left side, and the intestine turns to run parallel to it, 

 finally ascending to end in the anus near the atrial aperture. There is a single 

 gonad on the right side, which is vertically (dorso-ventrally) oriented and close to 

 the anterior end. It consists of a central ovary and several testes along the margin. 



In the second specimen the surface is wrinkled and not sand covered. 

 No lobes could be discerned for the apertures. The test is thin and somewhat 

 opaque. There are 4 or 5 dorsal languets. There are 6 longitudinal bars on 

 the right side of the pharynx and 5 on the left. About 20 stigmata on each side 

 of pharynx extending dorso-ventrally, the anterior ones breaking up into smaller 

 stigmata, but none of the latter elongated antero-posteriorly. About 6 gastric 

 folds. Anus with smooth margin. 



