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Show 1884.] ' L I G H T N I N G ' A N D 'PORCUPINE'EXPEDITIONS. 365 Family XVIII. EULIMIDiE. Genus G E G A N I A \ Jeffreys. S H E L L conical, reticulated, not umbilicated ; nucleus globular and intorted, not spiral, nor sinistral. Differs from Mathilda in having a short spire and an intorted but not a heterostrophe nucleus. Perhaps this genus, which in a great measure is founded on negative characters, may be the type of a separate family. The shell certainly is not smooth and polished like Eulima. GEGANIA PINGUIS % Jeffreys. (Plate XXVII. fig. 10.) S H E L L forming a short cone, rather thin, opaque and of a dull hue : sculpture, several spiral ridges, which are crossed by much more numerous and flexuous longitudinal stria?, so as to cause a partial decussation ; the spiral ridges vary considerably in number and strength, and sometimes they are alternately large and small, but they become at the base crowded and fine revolving striae; apex smooth and glossy: colour whitish: spire short, bluntly pointed: whorls 5, swollen; the last occupies more than two thirds of the shell ; nucleus bulbous, introverted : suture deep : mouth squarish, acutangular above and nearly rectangular below : outer lip semicircular except for the upper corner of the mouth : inner lip reflected, broader on the lower part of the pillar, which is very gently curved : base expanded, slightly concave or depressed but not umbilicated nor angulated. L. 0*3. B. 0*16. 'Porcupine' Exp. 1870: Atl. St. 16, 17, 17a. 1. EULIMA SUBULATA, Donovan. Turbo subulatus, Don. Br. Sh. pi. clxxii. E. subulata, B. C. iv. p. 208 ; v. p. 215, pi. lxxvii. f. 7. 'Porcupine' Exp. 1869 : St. 2, 9, 18 (and var. nana). 1870: Atl. Vigo B., 29, 30 (var. pallidula) ; Med. 50, 55, Benzert Road, G. Tunis, Adventure Bank. Variety pallidula; bands of a paler colour, and more or less interrupted. Distribution. Dublin Bay and other parts of Ireland, Anglesea, and southern coasts of England, Atlantic coasts of France and Lusi-tania, throughout the Mediterranean and Adriatic, Canaries, Madeira, and Azores ; 2-227\ fms. I suspect that the following localities may have been misapplied to this species instead of to E. biline-ata:- Scarborough (Bean) ; Orkneys, 12 fms. (Forbes) ; Shetland, 5-90 fms. (Forbes). Fossil. Miocene : Vienna and Bordeaux Basins, N.W. Germany, Transylvania, Podolia, and Volhynia. Pliocene: Coralline and Antwerp Crags, France and Italy. Of the numerous synonyms, which it is unnecessary to recapitulate glaber of Da Costa is prior to subulata and every other ; but the present name has been sanctioned by use. The dwarf variety (nana) shows that size is not the only character which distinguishes i ijjie l i ame of one of tbe Vestal Virgins. 2 Plump. PROC ZOOL. Soc-1884, No. XXV. 25 |
