1877.) MR. G. F. ANGAS ON NEW AUSTRALIAN SHELLS. 177 
obtuse, posterior side arcuate ; dorsal margin arched, basal margin 
very slightly areuate. 
Long. 33, alt. 24, lat. 12 lines. 
fab. “* 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 poste- 
riorly, shorter in front; ventral margin arcuate; umbones tumid, 
approximate. 
Long. 13, alt. 1, lat. 2 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 epider- 
mis, finely and irregularly concentrically striated by the lines of growth, 
with a few very faint strize 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. 12 line.- 
Hab. Brought up from a depth of 45 fathoms on the “tangles” of 
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. | Fig. 15. Alvania elegans, p. 174. 
2. Paludinella gilest, p. 170. 16. gracilis, p. 174. 
3. Murex brazieri, p. 171. 17. Torcula parva, p. 174. 
4. Peristernia braziert, p. 171. 18. Turbo exquisitus, p. 175. 
5. Truncaria australis, p. 172. 19. Cylichna elegans, p. 175. 
6. Olivella braziert, p. 172. 20. Diaphana brazieri, p. 175. 
7. Columella (Anachis) smithi, p. 21. Ervilia australis, p. 175. 
172. 22, Mysella anomala, p. 176. 
8. Marginella strangei, p. 172. 23. Cytherea sophie, p. 176. 
9. —— metcalfi, p. 173. 24. Lucina (Codakia) quadrata, 
10. Obeliscus jucundus, p. 173. p. 176._ 
ll. Osecilla ligata, p. 1738. 25. Kellia solida, p. 176. 
12. Stylifer brazieri, p. 173. 26. Nucula pusilla, p. 177. 
13. Conus metcalfi, p. 174. 27. Leda ensicula, p. 177. 
14. Bittiumturritelliformis, p.174. | 
Proc. Zoou. Soc.—1877, No. XII. 12 
