118 MONOGRAPH OF THE FOSSIL POLYZOA OF THE 



E. ovalis, n. s., fig. 2. — Colony branching, branches rather narrow and robust, sur- 

 face of branches convex. Cellules pyriform, in regular quincunx, somewhat elevated 

 in front and at the anterior portion of the sides, so as to present an imbricating ap- 

 pearance, surface convex, with the distal and antero-lateral edge abruptly curved, 

 and the posterior portion more flattened. Mouth small, round, somewhat variable 

 in size, not terminal, and situated at the anterior end of a slight depression of an 

 elongated oval form in the surface of the cellule. No ovarian vesicles were observed. 

 The surface of the cellules appeared to possess no special ornamentation, but we are 

 not prepared to say that younger and more perfect specimens may not exhibit them 

 in some form. 



Eocene of (?) Claiborne, Ala. 



Related in the form of the cellule to E. Blandina and E. Eurita of d'Orbigny, more 

 especially the latter, it can be at once distinguished from the first by the more pyri- 

 form shape of the cellule, more compressed colony, and by the mouth being small, 

 round and placed in a depression ; from the latter by the cellules being proportionally 

 shorter, by the size and shape of the mouth, and in the narrow dichotomous character 

 of the colony which in Eurita appears to be almost lamellar. Figure c represents the 

 broadest form of the colony we have seen. The branches, having about the same 

 thickness, are sometimes one-fourth narrower. We could detect no abortive cellules, 

 even on the edges of the branches where they occur so abundantly in some other 

 species, such as E. digitata, &c. 



E. ? fragilissima, n. s., fig. 3. — Colony very fragile, mode of growth unknown. 

 Cellules in longitudinal rows and quincunx, separated laterally by a slight depression, 

 produced by the meeting of the two convex surfaces, not separated anteriorly from 

 the succeeding cellule. Mouth terminal, circular, bordered by a very delicate raised 

 lip, and slightly elevated above the surface of the next cellule. Surface perforated by 

 numerous minute, irregular pores. 



This species is referred doubtfully to Eschara because we have never seen but the 

 upper and side walls. It has more the appearance of Eschara than any other genus 

 of the family. The walls are the most delicate we have ever seen in any testaceous 

 polyzoon, and are still further weakened by the little cohesion of the rows of cells, so 

 that the specimens are generally found in the shape of half a dozen cells only in con- 

 tact. Cellepora tumida, d'Orb. (Escharina, id. Lonsdale) resembles this species in the 

 general characters of the cellule, but may be distinguished by the cells being shorter, 

 more convex and less profusely punctate, and in the mouth of the latter being always 

 round, with no teeth or emarginations, while G. tumida has a notch in the proximal 

 edge of the mouth and sometimes two teeth on the same side. 



This beautiful little species is from the miocene marl of St. Mary's River, Maryland. 

 Coll. W. M. G. 



