F. A. Bather — On Ha2^alocnnus Vlctorice. 



343 



above the second brachial into two main branches, which occa- 

 sionally branch again. Each of these branches bears alternately 

 disposed I'arauli ["pinnules" of most authors], with very elongate 

 ossicles. The columnals at some distance from the cup are very long, 

 with a thickened ring in the middle, and often provided with cirri." 

 The family includes the genera Hapalocrinus, Agriocrinus, Thallo- 

 crinus, and Coccocrinus, of which the first three are new and based 

 upon species from the Hunsriickschiefer of Bundenbach. The 

 type-specimens, unfortunately, like most of the Bundenbach speci- 

 mens at which Dr. Jaekel has worked with such zeal and 

 intelligence, are very difficult of interpretation. The characters 

 selected by the author of the genera as diagnostic may, so far 

 as they are known, be set out in the following table : — 



Two things are made clear by this table. First, that Thallocrinus 

 retiarius does not agree with the type-species or with the original 

 diagnosis of the genus in two supposed diagnostic characters. Second, 

 that the differences between these genera are very slight and based 



