150 MONOGRAPH OF THE FOSSIL TOLYZOA OF THE 



length rounded in front ; proximal edge usually straight. Surface of the cellule sunk 

 very distinctly below the level of the surface of the colony, and marked by about five 

 or six pairs of transverse fossets, reaching almost to the middle of the cellule, leaving 

 a narrow, median, imperforate line. Special pores numerous, exact number not de- 

 termined ; placed in advance of and around the mouth. 



One large colony of this species, from Timber Creek, N. J. Cretaceous. 



The mass is nearly four inches long, by two wide and nearly two high. The 

 plates are tortuous and anastomose frequently and at all angles. The cellules are very 

 distinct to the naked eye, placed in regular quincunx, and the cribrate portion deeply 

 immersed. The real boundary of each cellule is regularly hexagonal, elongated, some- 

 times to such an extent as to become quadrangular; the dividing wall is thin and the 

 cellules are always in contact. We could not determine satisfactorily whether the 

 mouth is absolutely terminal or not. We believe, however, not. The special pores 

 amount in number probably to six. and are placed in the intermediate elevated por- 

 tion, surrounding the mouth in advance, and as far back as its proximal corners, if 

 not to some distance beyond. We could not ascertain all the details of this species, 

 since the specimen is much weathered. 



The peculiar, immersed character of the cellules of this species, and the numerous 

 special pores, make it one of the best characterized species we have seen. 



We have another very pretty, robust species, with elongated cellules, the mouth 

 transversely oval, and the two pores placed in advance; from the Eocene of South 

 Carolina. The only specimen we have seen is too much worn for description. 



'PLIOPHLCEA, {N. G.) G. and H. 



Colony composed of free plates or branches, composed of more than two layers of 

 cellules ; commencing by two layers, placed back to back, on each side of a median, 

 germinal plate as in Eschara and Escharipora, and afterwards, encrusted by an un- 

 limited number of other layers, not always placed regularly. Cellules as in Escharipora ; 

 usually placed in regular lines and quincunx, with the oval opening in advance, sur- 

 rounded by two (or more?) special pores, and with the surface pierced by special 

 fossets. 



We have proposed this genus to receive a well known species, described by Dr. 

 Morton as F I antra sagena. It bears the same relation to Escharipora as Cellcporaria 

 does to Eschara, and is another illustration of the remarkable fact that most of the 

 forms of one family in this sub-order are reproduced in all the other sub-orders. 



P. sagena, G. and H., fig. 34. 



Flvstra id., Morton, Synopsis, p. 79, pi. 13, f. 7. 



Escharina id., Lonsd. Quart. Jour. Geol. Soc, vol. 1, p. 71. Id. d'Orbigny, Prod. 



Pal. Strat., vol. 2, p. 2G3, No. 10G3. 

 Reptescharinella id., d'Orb., P. F., vol. 5, p. 429. 



