Proceedings of the United States National Museum . < /of \t\ \. Fig. 2.— of of Plates of (B) AcriNAri Sidej of Scutella SUBROTUXDATA Lam.^ECK WITH THAT OF (A) SCUTELLASTER CrETACEUS CEAGIX. THE Letters Indicate the Equivalexts as Interpreted by the Writer. Peristome=P. missing, and it is possible only to guess at their probable maximumlength and breadth. The original surface of most of the plates isgone and in only a few small areas is anything suggesting the spinesor tubercles present (see pi. 1, fig. 2). No part of the ambitus ispreserved, and any statement as to t
Proceedings of the United States National Museum . < /of \t\ \. Fig. 2.— of of Plates of (B) AcriNAri Sidej of Scutella SUBROTUXDATA Lam.^ECK WITH THAT OF (A) SCUTELLASTER CrETACEUS CEAGIX. THE Letters Indicate the Equivalexts as Interpreted by the Writer. Peristome=P. missing, and it is possible only to guess at their probable maximumlength and breadth. The original surface of most of the plates isgone and in only a few small areas is anything suggesting the spinesor tubercles present (see pi. 1, fig. 2). No part of the ambitus ispreserved, and any statement as to the outline of a complete testis unfounded. To all appearances the outline of the specimen isas it was when originally found, and Cragin was probably unjusti- 4 PEOCEEDINGS OF THE XATIOXAL MUSEUM. vol. 66 fiecl in describing it shaped like Clypeaster. The test, howeverjclearly was broad and flat as in ScuteJlu. and such of the plates ofof the upper (abactinal) surface as can be made out do have ascutelliform arrangement. A hypothetical restoration of the abac-t
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
