2 7 8 



E. A. ANDREWS. 



of the entire glass. In other cases such settlements are made at 

 the edges, or here and there over the glass. Aggregation into 

 groups is the general rule. 



It will be noted that the 42 individuals of this aggregate are 

 most all in one plane, spread out over the glass and attached to 

 the glass so that the flat side of the sac, see Fig. I, is fast to the 

 glass while the tube of the case rises up away from the glass at 

 an angle of nearly 45 degrees, Fig. I. Fig. 3 was drawn with 

 the camera from the upper side of the cover glass to which the 

 cases were attached below, so that the tubes pass downward 

 from the level of the sacs. While most of the sacs stand side by 

 side in one plane, some overlap and some are fastened deeper 

 down in the water on top of the general stratum of sacs. It is 

 noteworthy that the tubes of all the cases radiate outward, with 

 few "exceptions. 



/f- 



FIG. 4. Side view of a group of nineteen individual Folliculinas that made these 

 cases on the edge of a cover glass floating on water. While most of the sacs stand 

 in a row some are behind others and some are across the general trend. A few lie 

 piled upon the others. One, No. 10, is in process of escape from the tube. Camera 

 ucida, preserved material. X 55. 



Most of these forty-two are generally alike in size and structure 

 of cases, and with the spirals in the same direction. The animals 

 themselves are but poorly shown, since they were distorted by 

 treatment with too much cocaine in attempting anesthesia; but 

 they show the moniliform nuclei and the stalks of attachment to 

 the bases of the sacs. 



Exceptional tubes similar to those of Wrights' specimens are 

 shown in Nos. 9, 16, 25, and 35 in which a second story has been 



