144 



•Shell elliptical, sul)cylinclrical, perforate ; colour, the two latter 

 whorls pale yellow, the former purple ; whorls 4.',, liattened, angled 

 below the suture, the last exceeding the rest iu length ; sculptui'e, 

 last whorl encircled by tive, the penultimate by three, wide liat- 

 topped lyra?, crossed longitudinally by tine stripe; suture impressed; 

 umbilical chink oblique, narrow ; spire obtuse ; peristome free, 

 entire, ovate, expanded. Length '2h, breadth 1 mill. 



Hab. The creek to the north of the Old Settlement. 



23. B. RAMSAYi, Brazier, 1889. 



Illustration. Brazier, Aust. Mus. Mem. J, pi. 4, figs. IT), IG, 

 (reversed). 



Type. Australian Museum. 



Shell narrowly ovate, perforate ; colour corneous ; whorls 4i, 

 convex, the last two-thirds of the total length ; sculpture faint 

 obli(iue striix? ; suture impressed ; spii*e obtuse ; umbilical chink 

 narrow oblique ; aperture obliquely ovate, eflu.se below, angled 

 above, peristome entire, slightly expanded and reflected. Length 

 4, breadth 2 mill. 



Hal). Runnins; streams on the eastern flanks of Mt. Ledgbird. 



ON TI[E ORGANISM DISCOLOURING THE WATERS 

 OF PORT JACKSON. 



By Tho>s. Whitelegge. 



[The following n-port on the discolouration of the waters of the 

 liarljour has been juvpared by authority of the Trustees of tlie 

 Australian 31u.seuui, at the request of the Commi.ssioners of 

 Fisheries for New South Wales. 



It is a preliminary report, and has ali'eady appeared in some 

 of the Sydney daily papers. Mr. Whitelegge is still engaged in 

 the investigation, and in the preparation of a paper on the 

 subject. — Ed.] 



Australian Museum, l."')th April, 1891. 



To Dr. E. P. Ramsay, F.R.S.,E., Curator. 



Sir, — T have the honour to report that, in accordance with 

 your instructions, 1 have visited various parts of the harbour, 

 with the vit.'w of ascertaining the probable'efiects of the Peridinium 



