34 AUGUSTA ÄRNBÄCK-CHRISTIE-LJNDE, NORTHERN AND ARCTIC INVERTEBRATES. 



right side: dorsal lamina — 3 — 1 — 1 — 1— endostyle; 

 left side: » » —2—1—1—1— 



There is no intermediate vessel on the interspaces between the folds. 



The gonads are only a little developed; their number could not be exactly 

 stated. Numerous endocarps are scattered över the body-wall. 



Cnemidocarpa cirrata n. sp. 



Pl. 2, figs. 27—32. 



Habitat: 



West Greenland: Jacobshavn, 120 fms, clay with sand, a great number of 

 specimens (August 14, 1870, Öberg). 



East Greenland: Franz Joseph Fjord, at a distance of 1 km from the shore, 

 73° 16' N— 23° 15' W, 28—36 m, clay with gravel and shells, 2 sps (August 29, 1899, 

 Greenland Exp. 1899). 



Spitzbergen: Wijde Bay, 40 fms, fine clay, 1 sp (July 1861); between Waigat 

 Islands and Lovén's Mount, 100 fms, fine clay, 1 sp (August 15, 1861, Malmgren). 



Arctic North America: 72° 8' N— 74° 20' W, 30-80 m, härd bottom and 

 mud, 1 sp. 



Description. 



External Appearance. 



The form of the body varies, being in some specimens nearly spherical in others 

 ovate. (Pl. 2, figs. 27 — 28.) The apertures are situated near together, the atrial 

 one is somewhat turned över to the dorsal side. In preserved specimens they are 

 level with the surface of the test and small, but easily detected. The test is smooth, 

 sometimes with faint, transverse folds. It is covered with firmly adhering small 

 sand grains. From the posterior end of the body a rhizoid-like process with nu- 

 merous fine threads projects; in but few individuals two such tuft-like processes 

 were present. The colour of the test is grey, like grey clay. 



It should be mentioned that, in an individual from Spitzbergen, the test is of 

 brown colour, thick and provided with dense, fine wrinkles. On the inside a thin 

 nacreous lining was observed. 



The individuals are all of a small size; the largest specimens measure about 

 9 mm in length, baso-apical, and 6 mm in breadth, dorso-ventral. 



Internal Structure. 



The test is usually thin, not transparent. The mantle musculature is well 

 developed. The oral tentacles are slender, of great length and different size. The 



