peller, and, of course, the general agreement of these fossils with 

 each other. 



The figure of Dr. Capeller's fossil, is useful also on another account. 

 Articulated tentacula are seen passing from the inside of the ringers, 

 plainly evincing that these fossils are the superior terminations, and 

 not as Mr. Lister and Mr. Beaumont supposed, the radices of encrini. 

 The form of the ringers 'of the encrinus, figured by Dr. Capeller, so 

 much accords with that of the fingers of the encrinus in Mr. Dono- 

 van's Collection, and which I shall next notice, as to induce me al- 

 most to think, that Mr. Donovan's fossil may be of the same species 

 with those which have been just examined. 



One of the encrini figured by Dr. Capeller differs from the rest suf- 

 ficiently, to allow it to be considered as a variety of this species ; the 

 metacarpal ossiculae being so thickly and deeply radiated, as to give 

 to each of them somewhat of a roselike form. 



The fossil figured Plate XVII. Fig. 12, is a small specimen, appa- 

 rently of this species, which is in the British Museum. The only ac- 

 count of this fossil, which I could obtain, is that which is contained 

 in the label accompanying it, describing it, " Modiolus galeatus, from 

 Benbuisghen, a high mountain near Murlach Mor, in the county of 

 Sligo." 



I am at present unable to offer any opinion respecting the nature 

 and form of the trochital trunk of this animal, or of its inferior extremi- 

 ties. I, however, hope, that having traced it thus far, I shall learn, 

 before long, that some other admirer of these subjects, resident in the 

 neighbourhoods in which they are found, will have more success- 

 fully extended this investigation. Then, and not before, can this 

 animal be designated by an appropriate name ; at present, it may be 

 proper to term it, agreeable to the resemblance which it bears to 

 the nave of a wheel, the NAVE ENCRINITE. 



In the very valuable and interesting museum of Mr. Donovan is, I 

 believe, an unique specimen of the remains of an enerinite, which 

 seems to have been nearly intermediate, with respect to the length of 



