PLATE 32. 



Fig. 1. 505, 7. Streptelasma calicula. (Pag. 111.) 



1 a. Anterior view, showing the interstitial or additional rays on each side of two continuous rays. 



1 b. Lateral view, showing interstitial rays on one side of a continuous ray. 



1 c. The opposite side of tlie same individual, sliowing the same character as fig. 1 b. 



1 d. View sliOwing the interior of the cup; and posterior or shorter side of the coral. 



1 c. Transverse section, showing the number of rays with the alternating dentate processes. 



1 /. A vertical section sliowing the depth of the cup. The margin above is broken oflF. 



1 g. An unusually large individual of this species : lateral view. 



1 h. An individual more straight than usual. 



1 i. A. small individual with the enveloping membrane or cup entirely destroyed, leaving only the rays. 



4 k. An enlarged portion of the margin of the cup, showing that the dentate process between the rays ap- 

 pears externally, and extends downwards equally with the full ray. 



Fig. 2. 506. 1. Polydilasma turbinatum. (Pag. 112.) 



2 a. An individual (larger than the prevailing size), somewhat weathered on the surface, and showing, 



slightly, the lamellas. 



2 6. A specimen of ordinary size, much weathered, and showing the lamelte in pairs and bifurcating above. 



2 c. A specimen showing two bases or points of attachment. 



2 d. A specimen of ordinary size, divided vertically, sliowing the deptli of the cell, which is filled with frag- 

 ments of corals. 



2 c. The cell of another individual, having the margin somewhat worn. 



2 /. Several of the lamelhe enlarged, showing the termination of the alternate ones at the point where the 

 cup deepens. 



2 g. A transverse section near the base of a small specimen, showing the arrangement of the lamellae and the 

 absence of transverse dissepiments. 



2 h. An individual of more elongated form than usual. The upper part is a bud from one side of the centre 

 of the lower cnp, which the partial wearing down has made to appear as a continuation of the same. 



2 i. A longitudinal section showing a confused cellular structure below the centre of the cell. 



Fig. 3. 419. 1. Caninia bilateralis. (P^g. 113.) 



3 a. View of the specimen, showing the cup with the depression in the dissepiments on the anterior side. 



3 6 4" 3 c, showing the arrangement and coalescing of the lamellai in the cup. 



Fig. 4. 507. 1. CoNOPHYLLUM niagarense. ( P^g- 114.\ 



i a. A specimen of the turbinate form, showing the rays externally. The denticulate rays within the cup are 

 also well shown, and the denticles between the dissepiments near and below the upper margin of the 

 cup on the outside. 



4 6. A turbinate specimen, showing the denticulate lamella; on the external surface. 



4 c. A small turbinate specimen with the surface worn, showing the successive dissepiments, and the den- 

 ticulate lamella; within the cup. 



4 d. The external surface of an unweathercd specimen, where the edges of the transverse dissepiments pro- 

 ject at intervals. 



4 e, f, g. Portions of the interior of the cup enlarged, showing the condition of preservation of the denti- 

 culated lamella?. 



4 ft. i, k, I. The exterior of specimens of various sizes, more or less worn, showing in 4 ft particularly the 

 arrangement of the dissepiments wli'ere partially worn down. 



4 TO. A small specimen, showing a section through the centre, with deep transverse cup-form septa. 



4 n. A specimen showing apparently lateral budding. 



* Fig. without number, enlargement of a portion of the surface of Fenestella. 



