62 PROBOSC1NA. 



that in P. davidsoni the sutures between the zooecia are not 

 shown, and that P. luchi is a young, incomplete zoarium. Both 

 appear to be synonyms of P. eudesi, from which they differ only 

 in that the orifices are slightly larger, and the surface of the 

 zoarium is flatter. 



The nearest ally of Proloscina eudesi, Haime, is a form figured 

 by D'Orbigny 1 as Reptotubigera ramosa, D'Orb., from the French 

 Senonian. This Cretaceous species differs, however, by having 

 larger orifices and a more carinate zoarium. Its formula is 

 I', 0, 2, 4-7, a comparison of which with that for P. eudesi will 

 show the closeness of the two forms. 



The reference to D'Orbigny's species raises the difficult question 

 as to its right name. The term ramosa has been applied to forms 

 which must be included in Proloscina (as that genus is here 

 defined) by Hagenow and Michelin, as well as twice by D'Orbigny. 

 The following names all have claims to recognition : 



^Aulopora ramosa, Hag., 1839. 

 Diastopora ramosa, Mich., 1845. 

 Proboseina ramosa, D'Orb., 1852. 

 Reptotubigera ramosa, D'Orb., 1852. 

 Stomatopora sarthaeensis, Perg., 1890. 



The Aulopora ramosa, Hag., 2 has priority, and as the description 

 of it is full and lucid, the name has to stand as that of the true 

 Proloscina ramosa. The specimens figured by D'Orbigny as his 

 Proloscina ramosa 3 probably belong to this species, in spite of 

 the fact that D'Orbigny includes them with Michelin's species, 

 and makes no mention of Hagenow's. Pergens, moreover, has 

 separated them from Hagenow's species, and made them the type 

 of a new species Stomatopora sarthaeensis.^ D'Orbigny's figures, 

 however, appear to agree in all essentials with Hagenow's descrip- 

 tion. They both have the "zart fadenformig " shape, the same 

 mode of branching of the zoarium, and the form of the zocecia. 



1 D'Orbigny. Op. cit. p. 754, pi. occli. figs. 1-3. 



2 Von Hagenow. Mon. Kugen'schen Kreide-Verst. Abth. 1, Neu Jahrb. 

 1839, p. 291. 



3 D'Orbigny. Op. cit. p. 851, pi. Dcxxxii. figs. 1-3 ; pi. ocxxxiii. figs. 1-3. 



4 E. Pergens. Eev. Bry. fig. par D'Orb. : Butt. Soc. beige Geol. t. iii. 

 Mem. 1890, p. 332. 



