The annals and magazine of natural history : zoology, botany, and geology . sor and Kolesch meant by these plis 58 Mr. F. A, Bather on EiKidaris and rayonnants or * radiiiren Vertiefungen/^ Kinj^ merelysaid Glenoid circles radiately crenulated/ words that refersolely to what is here called the creiielate platform of theboss, and in this respect there is no difference betveen theGerman atid the British specimens. If the words of Koleschare due to an independent study of interambiilacrals fromthe Magnesian Limestone, he may be referring to the factthat the depressions between the crenellse are o
The annals and magazine of natural history : zoology, botany, and geology . sor and Kolesch meant by these plis 58 Mr. F. A, Bather on EiKidaris and rayonnants or * radiiiren Vertiefungen/^ Kinj^ merelysaid Glenoid circles radiately crenulated/ words that refersolely to what is here called the creiielate platform of theboss, and in this respect there is no difference betveen theGerman atid the British specimens. If the words of Koleschare due to an independent study of interambiilacrals fromthe Magnesian Limestone, he may be referring to the factthat the depressions between the crenellse are occasionallyprolonged faintly do^vn the slope of the boss. Such anoccurrence, however, is not uncommon in other allied species,and has been observed by both Spandel and myself inC. k<yserhngi. What differences Lambert thought he couldsee between these two species, does not appear in his writings :we shall return to Permocidaris, which he defines as anArchasocidarid, and it will then be clear that C. verneuilianacan have nothin: to do with such a genus. Fijr. 2 Ficr. Mioeidaris keyserlinr/i. Two of the most perfectly preserved fragmentsof interambulacra &om the Magnesian Limestone of TunstallHill, CO. Durham, showini? the association and general shape of theplates. In tig. 2 the scrobicules are confluent; in fig-. 3 they areconfluent above, but merely contiguous in the ambital region. The species described by King, though referred by him toArchceocidaris in his text (1850, p. 53) and to Palcechinus inthe legend to his plate, is in fact a Cidarid. The sub-hexagonal form of the plates which . . principally led^ him to regard it as an Archceocidaris must be assigned to theimperfection of his specimens. There are before me 11fairly large fragments of interambulacra, each with twocolumn?, but none with more. The outer lateral margins of some Species ri furred to it. 59 the individual plates may occasionally be convexly curved,and a slight accentuatiou of this appearance might g
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