NATURAL HISTORY SOCIETY OF GLASGOW. 75 



assuming any other form, size, or ornamentation. But the speci- 

 mens found in the shales above the Hosie limestone are elegant 

 and complete structures, twice the diameter of the former, 

 the cells being formed in a mass of some thickness, with well- 

 defined elevated cups, and depressions in the mass separating 

 the cups from each other. The cups are symmetrically formed, 

 strong, with rounded bottoms. The whole structure is finely 

 reticulated. 



III. tipirorbix ca/p&ratus, M'Coy. This little Annelid often 

 selected Crinoids on which to attach and construct its abiding; 

 place, and does not seem to have chosen any but those which w r ere 

 much worn. Although numerous, the specimens are by no means 

 conspicuous, and a small bit of Crinoid may have from one to four 

 specimens on its surface ; but comparatively few bear the character- 

 istic markings, and the size is not uniform. Professor M 'Coy's 

 description does not seem to be perfectly correct, although not 

 likely to be misleading; but at the time of passing the "Synopsis" 

 through' his hands, he had seen only one example of the species. 

 " Strongly wrinkled concentrically," as described by him, applies to 

 distinct and regular, round, concentric, fine lines, crossing the shell 

 from one point of attachment to the other, a shell marking which 

 belongs to the outer coat exclusively, not as w r rinkles or wrinkle- 

 like, as illustrated by the specimens exhibited. 



A. A characteristic specimen. 



B. Partially abraded. 



C. Showing cavity and thickness of shell. 



D. Three specimens on a bit of worn Crinoid, along with 



Palcmcis, Stenopora, basal attachment of Polyzoon, 

 &c. 



E. A specimen entangled with web of Stenopora not 



during life. 



IV. Ortonia carbonaria, J. Young. To have found that good 

 specimens of Ortonia carbonaria had been laid aside for enquiry, 

 upwards of 50 years ago, is something very like a new observation. 

 Often in comparatively recent times, in agglomerated masses of 

 fossils, this organism has been found at Gare, and in the first 

 calmy limestone bed; but the specimens — about a dozen in number 

 —under notice, which had so long ago excited attention, are attached 

 to the surface of a clean well-preserved Crinoid. A question naturally 



