103 



apparently fresh, shells on the beach at Streaky Bay, Great 

 Australian Bight. Also Victoria, Tasmania, and New South 

 Wales. 



It is one of the most characteristic fossils of the raised 

 beaches along our coastline. 



Trapeziform, oblique, gibbous, very thick; radial costse, 

 rather distant and crenulated ; length, two inches. 



131. Bakbatta laminata, Angas, Proc. Zool. Soc, 1865. 



At several stations in the Great Australian Bight and St. 

 Yincent Gulf. 



Oblong, about one inch long and half an inch wide, concen- 

 tric lamella* imbricating and frilled. 



132. Pectunculus radians, Lamarck, An. s. Vert., vi., p. 51. 

 Port Lincoln; Encounter Bay; South-East coast (W. T. 



BednalU). Also Victoria, Tasmania, and New Holland 

 {JLamarcli) . 



Orbicular, with flattish, radial ridges, radially substriated 

 and concentrically finely striated. 



133. Pecttjncuetjs obliquus, Eeeve, P. Z. S., 1813. 

 Eowler's Bay, St. Vincent and Spencer Gulfs ; South-East 



coast. Also West Australia (type) and Tasmania. 



Suborbicular, inequilateral, produced posteriorly, ornament 

 similar to the last, but the radial ridges more elevated and 

 acute ; length, to one inch and a quarter. 



131. Pectitnculus flabellatus, Tenison-Woods, Trans. Roy. 

 Soc, Victoria, xiv., p. 61, 1878; P. orbicularis, Angas, P. Z. S., 

 1879, t. 35, f . 9 ; P. Beddomei, E. A. Smith, Moll. Challenger 

 Expedition., t. 18, f. 1, p. 252. 



Dead shells, Hallett's Cove ; Ardrossan ; Cape .Jervis ; Wal- 

 laroo. Also Victoria and Tasmania (T. Woods) ; Flinders 

 Island (R. JSL. Johnston!); Bass Straits {Angas; Challenger 

 Exped.). 



Orbicular, thick, with about 25 broad, somewhat depressed 

 radial ribs ; colour white, more or less clouded and spotted 

 with fulvous-brown. 



135. Pectuncttll's Gratakus, Dunker, Proc. Zool. Soc, 1856, 

 p. 357. 



Wallaroo {Br Gosse! and R. T.) Also New South Wales. 



A thick orbicular shell, smooth, white, with angular streaks 

 and flames of chesnut-brown colour ; about two inches in 

 diameter. 



135. Limopsis Bassii, E. A. Smith, Moll. Challenger Exped., 

 t. 18, f . 6, p. 256, 1885. 



