40 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



CARNEGIA, ne^Ar genus. 



The characters of this oenus are included in the diagnosis of the 

 type species as given below: 



Ty2)e of the genu><. — Carnegla hasslerl. 



CARNEGIA BASSLERI/' new species. 



This name is introduced for what appears to be a new genus of 

 Stroniatoporoid corals. Until Waagen and Wentzel described some 

 forms from the Salt Range of India the know n occurrence of this group 

 would have warranted the statement that it passed out of existence 

 before the commencement of Carboniferous time. The discovery of 

 a different but related type in an area so close geographicall}", and in 

 strata of such similar age as are those of India and China, is thus 

 deprived of most of its surprise. The Chinese form possesses charac- 

 ters which forbid joining it with any of the established genera whose 

 descriptions have been before me, and it represents, with little doubt, 

 a new genus. On the other hand, as but a single specimen is known, 

 and as in this group, more than in many others, the difficulty is great of 

 distinguishing ])etween specific and generic characters without the com- 

 parisons which several genericall}^ related species afford, 1 have adopted 

 the plan of including the genus and species in a single description. 



Description. — The growth of Carnegla hassleri is in small lenticular 

 masses, having a slight thickness relative to their spread. One exam- 

 ple, for instance, has a thickness of but 4 mm. and a diameter of 35 

 mm. The structure is tine and dense, and seems to be entirely without 

 the lamellate appearance which gives this group its name. 



In transverse section the coenosteum is seen to be made up of walls 

 and apertures, both possessing a ver^- irregular and tortuous pattern. 

 The walls are especially vermicular and inosculating, giving off dis- 

 connected spurs and dividing the inclosed space into small separate 

 apertures. The entire course of the walls seems to be made up of 

 curves, and the outlines of the apertures are of course correspond- 

 ingh^ curvilinear. The walls are relatively thick, and where projecting 

 spurs are given off these often appear to be rounded and enlarged at 

 the disconnected end, as if terminating in a pillar. Similar enlarge- 

 ments can be observed also in other portions of the walls. The zooidal 

 apertures are nearly equal in size, and the whole structure seems to 

 be quite regular, but not infrequently several of the apertures are 

 confluent, although the larger one thus formed is so tortuous that it 

 fails to have this appearance in the tout ensemble of the section. 

 Astrorhizse appear to be entirely absent. 



In longitudinal section the skeleton is seen to be composed of con- 

 tinuous zooidal tubes and continuous walls, the latter being, as already 



«This species is named after Mr. R. S. Bassler. 



