94 JOHAN KIÆR. [No. 



teries of the 2 nd order. Tids also appears from the mesh 

 which else are almost perfectly quadrate here being doub 

 the hsight of their breadth. 2 — 3 very broad spiracles 

 each mesh (fig. 9). 



The svallow is rather far behind, with a tick lip on t) 

 right side, and outside this a row of longue shaped processt 

 The esophagus narrow and strongly bent. The stomach Uti 

 and round. The gut twist strong (fig. 7). Anns considerat 

 lower than the gut twist, narrow, the edge swollen and fine 

 lipped. 



The kidney concrements large, som very large and visil 

 to the naked eye, diff used in the gut-wall and a little outsi 

 it, as in A. conchilega, 0. F. M. 



The genital organs as usual on the inside of the intestii 

 canal, where they form fine branching canals. 



Styela aggregata, I. Bathke, 1806. 

 (Fig. 14-19). 



The body either long, cylindrical, or proportionately sh( 

 club-shaped and dilated. The basis is always considera r 

 narrower than the middle of the body, so that the animal 

 often short stemmed (fig. 14 — 15). 



The size of full-grown specimens, calculated according) 

 10 partly medium, and partly very large animals: 



Lenght . . 34 — 56 mm., medium: 41.9 c 



The body in the tickest part 



on the average 12.5 — 24 „ — 19.3 



Distance betweenthe openings 



of the siphons 7.5 — 12 „ 9.3 



Distance between the basises 



of the siphons 3 — 5 „ — 4.5 j 



Breadth of the foot-piece or 



stem. 8 -13 „ - 10.2 



The testa thin, but firm, thickest at the basis. The n 

 face more or less furrowed ; the upper half always less f urrcr 1 

 than the lower, sometimes almost smooth, only with IfjP 



