OCR Text |
Show 1877.] MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. 177 obtuse, posterior side arcuate ; dorsal margin arched, basal margin very slightly arcuate. Long. 3i, alt. 2^, lat. If lines. Hab. "Bottle and Glass" rocks, Vaucluse Bay, Port Jackson (Brazier). A very solid, pure white, shining species, more oblong than most others of the genus. NUCULA PUSILLA, n. sp. (Plate XXVI. fig. 26.) Shell minute, obliquely and triangularlarly ovate, subventricose, inequilateral, rather thin, pale greenish white, under the lens very finely concentrically striated, and crossed with exceedingly delicate radiating hair-like lines ; dorsal margin sloping and convex posteriorly, shorter in front; ventral margin arcuate ; umbones tumid, approximate. Long. 1^, alt. 1, lat. § lin. Hab. Port Jackson, in shell-sand (Brazier). LEDA ENSICULA, n. sp. (Plate XXVI. fig. 27.) Shell equivalve, very inequilateral, depressed, ovately oblong, the anterior side attenuated into a long narrow rostrum curving upwards, rather thin, whitish, covered with a delicate pale olive-coloured epidermis, finely and irregularly concentrically striated by the lines of growth, with a few very faint striae radiating anteriorly from the umbones; dorsal margin concave in front and excavated on both sides with two narrow diverging ridges extending from the beaks to the end of the rostrum, the space between them being crossed with fine striae, short and convex behind; posterior side bluntly angled; ventral margin arcuate; beaks small, distinct, approximate, incurved. Long. 7, alt. 3, lat. 1^ line. Hab. Brought up from a depth of 45 fathoms on the "tangles ot the dredge, off Port-Jackson Heads (Brazier). A very remarkable shell, quite unlike any other Australian form of the genus at present known. EXPLANATION OF PLATE XXVI. Fig. 1. Bulimus ponsonbii, p. 170. 1 Fig. 15. Alvania elegans, p 174. 2. Paludinella gilesi, p. 170. 16. - gracilis, p. 174 a Murex brazieri. n. 171. 17. Torcula parva p. 174 18. Turbo exqmsitus, p. 175. 19. Cylichna elegans, p. 175. 20. Diaphana brazieri, p. 175. 21. Ervilia australis, p. 175. 22. Mysella anomala, p. 176. 23. Cytherea sophice, p. 176. 24 Lucina (Codakia) quadrata, p. 176. 25. Kellia solida, p. 176. 26. Nucula pusilla, p. 177. 27. Leda ensicula, p. 177. PROC 3. Murex brazieri, p. 171. 4. Peristernia brazieri, p. 171. 5. Truncaria australis, p. 172. 6. Olivella brazieri, p. 172. 7 Columella (Anachis) smithi, p. 172. 8. Marginella strangei, p. 172. 9. metcalfi, p. 173. 10. Obeliscus jucundus, p. 173. 11. Oscilla ligata, p. 173. 12. Stylifer brazieri, p. 173. 13. Conus metcalfi, p. 174. 14 Bittium turritelliformis, p. 174. ZOOL. Soc-1877, No. XII. 12 |