PLATE 33. 



Fig. 1. 50S. 1. DirLOPHYLLUM c^spiTosuM. (Pag. 116.) 



1 a. A single cell with a lateral bud on one side. The weathered portion near the top of the specimen shows 



very distinctly the transverse dissepiments. 

 1 4. A specimen cut obliquely, showing the transverse dissepiments in the inner circle of the cell. 

 1 c. A group formed by budding from a single stock below. One of the buds is broken off near the ba-se. 



The exterior surface is well preserved in this sjiccimen, showing the line transverse stria;. 

 1 d. A small group, showing one mode of budding. The continuation of the righthand portion of the figure 



has been broken off. 

 1 «. A cylindrical specimen, contracted at intervals from intermitted growth, and showing a tendency to 



budding at these points. On the lefthand side are two buds broken off; and on the righthand side are 



the germs of tlirec other buds which have not expanded. 

 1 /. A portion of fig. 1 a enlarged, showing the transverse dissepiments uniting the lamellie. 

 1 g, h. The cell natural size and enlarged, showing the denticulated appearance of the lamella;, arising from 



the dissepiments being partially preserved at the junction with the lamellse. 

 1 i. A vertical section of the cell. 

 1 k. A fragment showing the ends of the several stems standing out above the weathered surface, having the 



exterior portion still celhilar, while in many of them the centre is solid. 

 1 i. A polished section of a less crystalline specimen, showing the ends of several stems. 

 1 m. A part of a larger group, showing the manner of budding and increase. 

 1 n. A single .stem with two buds in the lower part, whicli are broken off near the stock; while near the 



upper part the buds are numerous, and thrown out on all sides. 

 1 o. A longitudinal section of several stems, showing the transverse dissepiments, which, near the base of one 



stem, are bent downwards in the middle, and are otherwise irregular in other parts of the stem. 

 1 p, r. Longitudinal sections from two different groups, showing irregularity in the transverse septa of the 



centre of the cell. 



Fig. 2. 509. 2. DipLopHYLLUM csspiTosuM? (Pag. 118.) 



Fig. 3. 510. 1. Syringopoka? MtJLTicAULis. (Pag- 119.) 



8 o. A small part of a larger group of these tubes from a silicious specimen. 



8 6. A transverse section, showing the ends of the tul>es. 



3 c, d. The end of a tube, natural size and magnified. 



3 c. A separated tube, showing contraction at intervals, with a shorter one at the base, and a bud proceeding 

 appararently from between them. 



3 y. A longitudinal section from the top of the cup downwards, showing in the upper part the simple rays, 

 and below the complicated oblique septa. 



8 g. A longitudinal section of a tube, the middle of the figure reaching to the centre of the tube, and show- 

 ing oblique septa, while at the two ends only the lamella) are seen. 



