190 



THE GEOLOGIST. 



" neutral ground between the Downton and the (Upper) Tilestones" 

 would have been clearly understood, had I introduced the bracketed 

 word. 



As regards the littoral evidence given by star-fishes, it certainly is 

 not so strong as it was prior to the discovery of certain forms in the 

 deep-sea ; but the whole facies of the life-remains from the Lower 

 Ludlow beds is indicative of a shallow sea-zone. The Pterygoids 

 with its great succulent body, whose remains are met with above and 

 below the Starfish-bed, could not have been a deep-sea creature : 

 and other, but smaller, shrimp-like forms are met with associated with 

 Bryozoans, and what appear to me to be true Fuci. 



These are matters of much interest ; and I am pleased to find that 

 the torch of search I have kindled in the pages of " The Geologist," 

 to explore the dim haunts of Cephalaspis, and his kinsman Pteraspis, 

 is not likely to be soon put out. Chiefly will it be kept alight by 

 contributions from men, like my friend Light body, who are familiar 

 alike with the creatures themselves and the far-off kingdoms they 

 inhabited. — [ am, Sir, yours very truly, Geoege E. Roberts. 



ON NEW BRACHIOPODA, AND ON THE DEVELOPMENT 

 OF THE LOOP IN TEREBRATELLA. 



By Charles Moore, E.G.S. 



( Continued from vol. hi., page 445 .) 



In addition to the Brachiopoda noticed in this paper, I am pos- 

 sessed of various minute specimens, which differ from any described 

 species. Some of these may be the young of Brachiopoda that 

 occur in the beds in which they are found ; but until their passages 

 into adult shells can be satisfactorily recognized, it will be undesirable 

 to figure or describe them. Three examples of well marked and 

 persistent forms are provisionally named and given below. 



Sjpirifera minima. Moore. PI. ii., figs. 19, 20. 



Shell microscopic, often one sided or unsymmetrical, slightly 

 rugose ; valves moderately convex ; deltidium triangular ; area 

 broad and flattened ; hinge-line broad ; front of shell rounded, in 

 some specimens the shell presents a uniformly flattened surface, 

 whilst hi the majority the outer surface of the smaller valve possesses 

 mesial folds, and in the larger valve a central sinus. 



Obs. — This shell is not uncommon in the Inferior Oolite of Dundry. 

 Although no internal characters have yet been noticed, there seems 

 little doubt the shell must be referred to the genus Spirifera. It is 

 perfectly distinct from a little shell found with it, described by me in 

 ihv Somersetshire Proceedings for 1854. We have thus evidence of 



