538 Transactions of the Society. 



The chambers are much more numerous than in L. rotundata (nearly 

 double) and less globose. Long diameter 1/28 in. 



Distrilntion. — I have notes of the occurrence of this fine species in 

 twelve samples of material, viz. the Felltop Limestone, at Wolf Hills, 

 near Haltwhistle; First Lower Felltop, Thornbrough; Great Lime- 

 stone, of Allendale ; Small Limestone, of Nenthead ; " D " Limestone, 

 of Tipalt and Cowburu valleys ; and the " J " Limestone, in Tipalt. 

 In the Thornbrough quarry 1 obtained it from five horizons, and in 

 the majority of these it was a common form. 



Sub-family Trochammininae. 



Genus Webbina, d'Orbigny. 



Webbina hemisphasrica, Jones, Parker, and Brady. 



In the rich material of the " D " Limestone there are frequent 

 examples of a monothalamous and adherent Foraminifer which appear 

 to me to belong to this species. The test is convex and imperfect on 

 the side of its attachment. The degree of convexity varies from a 

 somewhat low relief to almost subglobular. The margin is at times 

 slightly spreading, and not unfrequently exhibits a clear space between 

 some parts of the edge of the test and the object to which it is 

 attached. It is a minute form, not exceeding 1/50 in. in diameter. 

 It is an interesting feature to find this rare form, which has hitherto 

 only been known in the living state as dredged ofl:' the coast of Durham, 

 and as a fossil by a single specimen from the Sufiblk Crag, with so 

 hi-T-h an antiquity as these Palaeozoic examples confer upon the species. 



Distribution. — Only known in the Carboniferous rocks in con- 

 nection with the " D " Limestone, Tipalt. 



Webbina fimbriata, sp. nov. Plate VIII. figs. 8, 9. 



Test thin, adherent; in shape, convex or subcorneal; normally 

 monothalamous, sometimes two or three grouped together and con- 

 nected by minute stoloniferous tubes ; margin attenuated, spreading, 

 and deeply notched, giving the test a fringed or stellate appeara,nce. 

 Stellate projections numerous, short, raised, and tubular, sometimes 

 open at their extremities. Diameter of test 1/100 in. 



This is a very pretty Httle shell, and makes a conspicuous object 

 by its white colour shown on a dark background. The test is to all 

 appearance finely arenaceous and very thin, and owing to this latter fact 

 most of the examples have the test broken at the apex, as shown in one 

 of the figures. Some of the fractures probably date from a period prior 

 to the fossihzation of the specimens. Its habit of growth, in throwing 

 out tubular extensions from a primordial chamber, gives it a Hkeness to 

 Webbina elavata, and it is more closely isomorphic with Placopsilina 

 vesicularis, Brady ; but it difi'ers from the former species in the number 

 and stellate form which these tubular processes assume, as well as in 

 their very short length, seldom exceeding a length greater than the 

 diameter of the chamber from which they emanate ; whilst the finely 



