DESCRIPTIONS OF SPECIES. 91 



Geologic occurrence. Claiboi'lie Sailfls. 



Types. — PI. VI, figs. 16 to 16b, specimen on which the above descrip- 

 tion is based, from collection of T. H. Aldrich in United States National 

 Museum; PI. VI, figs. 14 and 15, United States National Museum. 



Since the foregoing description was written, I have found several speci- 

 mens in the United States National Museum. A study of these permits 

 considerably more detail to be added to the description. The ornamenta- 

 tion of the septal faces is quite diff"erent from that of T. pliardra and 

 T. wautuhheensis. The septa are verj- slightly undulated transversely, and 

 that is only along the inner portion. The septal surface, as a whole, is flat. 

 The granules, although originally introduced in curves parallel to the septal 

 margins, are not introduced regularly, so they do not show any very defi- 

 nite aiTangement. The smaller septa are joined to the larger by a series of 

 processes placed one above another, thus leaving a series of pores. This is 

 quite different from the condition met with in T. fiulcata, where the smaller 

 septa fuse solidly by their margins to the sides of the larger. 



A specimen much larger than the one from Mr. Aldrich's collection has 

 the following dimensions : Diameter of calice, 4 mm.: height of corallum, 

 9 mm. Figs. 14 and 14a, PI. VI, are drawn from it. The only special 

 peculiai-ity of this specimen is that the columellar upper surface is apparently 

 reinforced bv several thickened processes from the septa. 



The distinguishing features of the species are the presence of (1) rudi- 

 mentary costce; (2) the entire margins of the costse; (3) the simple enlarg- 

 ing, without a notch, of the costse in the basal portion; (4) the compressed 

 granulate (not stellate) termination of the columella; (5) the size. 



TUEBINOLIA INSIGNIFICA Sp. nOV. 



PL VI, figs. 17 to IS. 



This is a minute coral, conical in shape. Costse rather tall, com- 

 pressed, their sides near junction with corallum wall fluted, corre- 

 sponding to intercostal perforations. Margins apparently almost smooth. 

 Around the upper margin of the corallum there are 20 well-developed 

 costse and 20 rudimentary costpe (twice as many costje as septa); 6 septa 

 continue without any change to the very apex of the base. On the apex 

 of the base is a minute star-like body, the rays of which alternate with the 

 costse of the first cycle (i. e., the 6 more prominent costie). The costse of 



