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Show 1885.] ' LIGHTNING ' AND ' P O R C U P I N E ' EXPEDITIONS. 49 tertiary: Siberia, Norway, Bridlington, Lancashire, Cheshire, and Labrador. Murex costellifer, J. Sowerby, Admete crispa, Moller, and Cancellaria buccinoides, Couthouy. Among the varieties are one having the spire produced or elongated, and another which is much larger. The columellar folds are much stronger and more conspicuous in specimens from Spitzbergen and North America, and from the fossil bed at Bridlington. Spire bulbous and intorted. The animal was described by me in the 'Annals and Magazine of Natural History ' for April 1877. 2. CANCELLARIA MITR.EFORMIS, Brocchi. Foluta mitrceformis, Brc. Conch, foss. Subap. ii. p. 645, t. xv. f. 13. C. pusilla, H . Ad. in P. Z. S. 1869, p. 274, pi. 19. f. 12. 'Porcupine' Exp. 1870: Alt. St. 16, 24, 25, 28, 30. Distribution. B. Biscav ('Trav.' Exp. 1882), 249 fms.!, Canary I. (McAndrew) ! Fossil. Pliocene : Coralline Crag, Denmark (Morch), Biot, and throughout Italy. This appears to be a variety of Brocchi's species, and may be a somewhat altered descendant. The chief difference between the recent and fossil shell seems to consist in the former having only a few spiral ridges, while the latter is closely striated in the same direction as well as indistinctly reticulated by numerous and slight longitudinal striae. Not C. pusilla of Sowerby's ' Conchological Illustrations,' 1841. 3. CANCELLARIA MINIMA, Reeve. C. minima, Reeve, Conch. Icon. (Cancellaria), pi. xvii. f. 77, a, b. ' Porcupine ' Exp. 1870 : Alt. St. 28. Five specimens. Distribution. Gibraltar and Madeira (McAndrew). No habitat is given in Reeve's work, Cuming's collection being the only authority. Allied to C. subangulosa of S. Wood from the Coralline Crag, but differs in the want of angularity, as well as in the stronger and coarser sculpture, especially with respect to the longitudinal ribs ; the sculpture of the apex is also different, consisting in the recent species of very fine and microscopic spiral lines, and in the fossil shell of minute longitudinal stria?. A variety of C. minima, which has the whorls angulated below the suture as in the fossil species, was dredged by McAndrew with the typical form off Madeira and the Canaries; this has the same sculpture as in the recent species; and perhaps all these forms may represent one and the same species. In that case Searles Wood's name subangulosa would have priority over that of Reeve. 4. CANCELLARIA CANCELLATA, Linne. Foluta cancellata, L. S. N. p. 1191. PROC. ZOOL. Soc-1885, No. IV. 4 |