13G MONOGRAPH OF THE FOSSIL POLYZOA OF THE 



in rows, or composed of radiating rows of small pores. Accessory cellules rare, larger 

 than the others and open throughout their length. Ovarian vesicles frequently occur. 

 The special fossets behind the mouth will distinguish this genus from Escharifora, 

 where they are placed around the mouth, which is central. The presence of the 

 fossets and the entire absence of special pores separate the genus from Esehara, Escha- 

 rellina, Escharine'la, Porina, &c. 



E. micropoba, n. s., fig. 17.— Colony composed of robust, flattened branches, -with 

 cellules all round. Cellules elongated oval, narrowed posteriorly, arranged in very 

 regular quincunx. Mouth circular, opening obliquely upwards and outwards: bor- 

 dered by a prominent thickened, lip-like expansion, projecting very much from the 

 surface of the cellule, and sloping down to it ; middle anterior edge of the lip absent, 

 so that the proximal end of the succeeding cellule appears to slope into the mouth. 

 The outline of the lip is U-shaped externally, and the upper surface is abruptly trun- 

 cated. When the lip is abraded, as is represented in one instance in the figure, the 

 whole anterior end of the cellule seems to be depressed. Surface of the cellule orna- 

 mented by two rows of minute pores, slightly elongated transversely, arranged in 

 about eleven pairs opposite each other, and with a few at the proximal end of the 

 cellule uniting the two rows. Ovarian vesicle short, globular, broadly emarginate at 

 the oval margin, and with the accompanying cellule much broader than those not 

 provided with such an appendage. 



From the Eocene (of Ala. ?) 



The rough, rasp-like surface of well preserved specimens, and the elongated cellules, 

 round mouths and small fossets of all, will at once characterize this pretty little spe- 

 cies. We usually find about nine or ten rows of cellules visible on one side. Those 

 on the edges are as perfect as the others, and we noticed no abortive nor accessory 

 cells. 



REPTESCHARELLA, cl'Orb. 1851. 



Colony composed of one layer of cellules, arranged in contact with each other, en- 

 crusting submarine bodies. Cellules of only one sort, provided with the mouth in 

 advance and with a variable number, according to the species of transverse or radi- 

 ating "special fossets," always behind the mouth. Distinguished from Dlstamescha- 

 rella by the cellules being always in contact. Bears the same relation to Escharella 

 as Cdlepora does to Eschar a. 



R. carolinensis, n. s.. fig. 18. — Colony composed of a single layer of very small 

 cellules, irregularly grouped, occasionally, though rarely, in quincunx, and not in lon- 

 gitudinal lines. Cellules convex, broadly oval, sometimes distorted so as to be twice 

 as long as wide, or with one side nearly straight or angular. Mouth terminal, vary- 

 ing from circular to transversely oval, bordered by a slightly raised lip of uniform 



