. Science-gossip. IES OF G. K. GuDE, (Continuedfrom ]ot. I., fiu.^f SS3-J rUilopytis austeiii () (figs. Cf^a-f.). Four speci-mens, three adult, one. young, of an unnamed form ofricctopylis, differing from all described species, havebeen kindly placed in my liands for examination Godwin-Austen, with whose name I havemuch pleasure in associating this new species. Thenew shell is allied to PUc/opylis oglei (figured inSciENCE-Gossif, iv. (iSgSjp. 263, fig. 68), butit can readily be distinguished from that species by itsconcave spire; it is also much smaller
. Science-gossip. IES OF G. K. GuDE, (Continuedfrom ]ot. I., fiu.^f SS3-J rUilopytis austeiii () (figs. Cf^a-f.). Four speci-mens, three adult, one. young, of an unnamed form ofricctopylis, differing from all described species, havebeen kindly placed in my liands for examination Godwin-Austen, with whose name I havemuch pleasure in associating this new species. Thenew shell is allied to PUc/opylis oglei (figured inSciENCE-Gossif, iv. (iSgSjp. 263, fig. 68), butit can readily be distinguished from that species by itsconcave spire; it is also much smaller and muchmore flattened. In its parietal armature, it differs inhaving a short and a long median horizontalfold and a denticle in front of the verticalplate, all of which structures are absent in Plectopylisoglei. A comparison of the figures will also indicatedifferences in the palatal armatures of the two austeiii has further some affinity, as re-gards palatal armature, with /. niuspratti ( <cZ=Il Fio- 97-—Plectopylis austeni. SciENCE-Gossir, iv., 1897, p. 10, f. 45),but the latter is a dextral species and the parietalarmature is quite different, as also in the general shapeof the shell. The immature specinien of P. austeiiireferred to above has completed five-and-a-halfwhorls, and is interesting from possessing two sets ofarmature a quarter of a whorl distant from each other ;these differ considerably from the mature barriers ;the parietal armature here consists only of the verticalplate and a very short, slight, horizontal fold in frontof it. The palatal armature is similar to that of () Plectopylis austeiii, (figs, gya-f).—Shellsinistral, discoid, widely umbilicated, ochreous cor-neous, covered with a deciduous velvety cuticle;finely and closely ribbed, decussated by raised spirallines, rather distant on the upper side. One of thesespiral lines forms a ridge or keel on the upper angleof the whorls above the periphery, revolving abov
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
