134 BULLETIN 88, UNITED STATES NATIONAL MUSEUM. 



The genoholotype and only species, E. fottmanni, occurs in the 

 Lower Devonic (Lower Coblenzian) at Landscheid, near Wittlich, 

 in the Eifel, Germany. Plastotypes of the holotype were made for 

 the writer by Professor Jaekel, of Greifswald, and these are now in 

 the Yale University collection. 



Genus TRIMERASTER Schondorf. 



Plate 19, fig. 1. 



Trimeraster SCHONDORF, Palaeontographica, vol. 56, 1909, pp. 68, 108, pi. 7, 

 fig. 2; pi. 10, figs. 5, 6. 



Remarks. Trimeraster is a small form, very closely related to 

 Xenaster, and can be distinguished generically only in that the former 

 has inside of the inframarginals but one. pair of interbrachial margi- 

 nals and a single axillary interbrachial in each interbrachial field 

 instead of the five plates of the latter genus. 



Genoholotype and only species (one specimen). T. parvulus Schon- 

 dorf, from the Lower Devonic (Coblenz quartzite) at Konigstuhl, 

 near Khens, Rhine Valley, Germany. 



NEOPAL^ASTERIDJE, new family. 



Progressive Phanerozonia without interbrachial arcs. The columns 

 of supra- and inframarginal plates wholly superposed. Madreporite 

 abactinal. Well-developed ocular plates present. Ambulacrals alter- 

 nating. Disk with a ring of large plates of basal, radial, and inter- 

 radial ossicles. 



Contains : 



Neopalseaster, new genus. 



The origin of this family is uncertain, but it seems to be related to 

 the Promopalseasteridse, since its essential characters are those of the 

 Mesopalaeasterinse. In the latter the supramarginals do not com- 

 pletely overlie the inframarginals making one consolidated column as 

 in Neopalseaster. It is, so far as known, the oldest family developing 

 ocular plates. This fact is of considerable importance for it means 

 that the oculars were originally basal radialia, and that they have 

 progressively wandered from the disk and then remained at the tip 

 of the rays. 



NEOPALSEASTER, new genus. 



Plate 13, fig. 5; pi. 23, fig. 4. 

 Neopalseaster SCHUCHERT, Fossilium Catalogue, Animalia, pt. 3, April, 1914, p. 26. 



Generic characters. Disk of medium size, without interbrachial 

 arcs. Eays five, short and tapering rapidly. 



Abactinally the disk has a small central plate surrounded by 

 numerous smaller plates. Bounding the smaller accessory disk 



