893.] OVERSIGT OVER NORGES ASCIDIAE SIMPLICES. 



97 



astgrown upon a phallusia, a circumstance which perhaps 

 iay have caused this state. The testa is smooth, white, in 

 be spirit specimen, according to M. Sars' statement, light 

 lood-red when alive, thin, almost transparent, in the sm aller 

 pecimen, hut firm and leather-like. The testa is fast bound 

 o the bodyskin, which also is very thin, and with slightly 

 .eveloped muscles. Dimensions of the larger specimen: The 

 reatest length of the body: 18 mm.; the same plus the testa : 

 2 mm. The greatest height of the body: 18 mm.; the same 

 lus the testas expansion: 21 mm. The greatest breadth of 

 he body: 11 mm. Distance between mouth and sewer opening: 



mm. The larger specimen fast grown by the whole of its 

 ight side, and in consequence hereof both openings are situ- 

 ted far down towards the fast-grown basis of the body, both 

 n short siphons. The other specimen is fast-grown by its 

 nterside, and the opening therefore is advanced upon the upper- 

 art bf the body. The horns of the dorsal tubercle not rolled in, 

 tie opening between them turns to the front — 20—25 alternating 

 Dng and short tentacles. The dorsal fold high, ruffled, runs 

 own on the right side of the swallow which has two thick, 

 wollen lips; on each side 4 branchial folds, which run to- 

 ether, not towards the swallow, but directly behind it. The 

 uilding of the brancial sack do es not differ much from the 

 ther styela-s^ecies. In each mesh 5 — 7 large, narrow-spiracles. 

 Fearest the endostyle broad mesh with about 12 spiracles 

 ig. 22). The swallow arched, the stomach large, dilated, 

 aarply defined both against the esophagus and gut; this 

 )rms an S. shaped twist. The anus narrow, strongly cut out 

 lto 10 laps, and is fast grown to the bodyskin (flg. 23). The 

 enerative glands are very charateristic for this species. On 

 ie right side there are 8, and on the left 9 (in the smaller 

 )ecimen only 5) cylindrical, well bounded, generative glands, 

 "hich run upwards, towards the sewer's opening, and end 

 ath each its distinct out-put opening (fig. 24.) These gene- 

 itive glands are only with fine binding tissue loosely con- 



ected with the outer body-wall. In the section (fig. 25) it 



Vid.-Selsk. Forh. 1893. No. 9. 7 



