76 PROCEEDINGS OP THE NATIONAL MUSEUM vol.83 



has calices that project but slightly and are considerably elongated, 

 with low, rounded, strongly echinulate costae, and pali before the 

 first three cycles of septa. 



SfenosmiJia de Fromentel (1870, p. 383), species of which occur 

 in the Upper Cretaceous of Europe, is very close to, if not identical 

 with, DichoGoenia. D. treclimamn closely resembles aS. froletaria 

 Oppenheim (1930, p. 437) from the Senonian of Austria (Gosau), 

 but the costae are not so strong, the corallites are more protuberant, 

 and the septa are more numerous in the Jamaican form. 



Family FAVIIDAE Gregory 



Genus RHABDOPHYLLIA Milne Edwards and Haime, 1851 



Gregory (1930, pp. 102-103) discusses the relationships of Rliab- 

 dofhyUia, A'plopliyllia^ and CladophyJlia and finds that the only 

 difference between the first tv.'o genera lies in the incomplete costae 

 of the second as compared with t\\Q Qora^lQiQ cosio-o, oi Rhabdophyllia. 

 He accordingly projDoses to consider Rhahdophyllia a synonym of 

 Aplophyllia d'Orbigny, 1849, because the latter has priority. Duncan 

 (1884, p. 80) considered them identical but dropped d'Orbigny's 

 name for the better known RlidbdopliyJUa . For the present, however, 

 I should keep the two genera separate. Rhahdophyllia is very close 

 to CalamophyUia but possesses a better-developed columella and 

 lacks the accretion ridges or collarettes of the latter. Tlie species 

 described below has occasional encircling ridges resembling collar- 

 ettes, but they lack the regularity of CalamophyUia. 



RHABDOPHYLLIA QUAYLEI, new sp cies 

 Plate 2, Figures 3, 4 



Description. — Corallites tall, cjdindrical, or irregularl}^ rounded 

 in section, with an average diameter of 12.5 mm, dichotomous, in- 

 creasing by fission, the new corallites projecting upward and out- 

 ward at a slight angle from the parent corallites. Corallite walls 

 solid, costate, without an epitheca. The costae alternate in size, cor- 

 responding to the septa, their margins being acute and granulate. 

 The septa are variable in number within the calices because of fission 

 but are more or less constant within the cylindrical corallites; in a 

 calice measuring 9 by 17 mm there are 81 ; in a corallite measuring 

 approximately 10 mm in cross section there are 60. They are about 

 equal in thickness and regularly alternate in length, so that one-half 

 of them extend to the center and unite with the columella. They are 

 laterally granulate and are dentate on their upper margins. The 

 columella is well developed, spongy, formed by the entangling of 



