1867.J MR. G. F. ANGAS ON AUSTRALIAN MOT.LXJSCA. 225 



Not uncommon under stones and in crevices of rocks, at low water, 

 in various parts of Port Jackson. Length 3 inches. 



On comparing the specimens in the Cnmingian Collection (now in 

 the British Museum) of C. gunni, Reeve, and C. rosinitus, Reeve, 

 I can detect no characters which appear to separate them specifically 

 from C. stinatns, Lam., and I am inclined to regard them all as 

 varieties of that species. Specimens in my own cabinet from Port 

 Jackson, Port Adelaide, Port Lincoln, and Tasmania seem all to be- 

 long to the same species, displaying but slight variations in the an- 

 gularity and breadth of the valves. 



Order TECTIBRANCHLITA. 

 Fam. AcTdEONiD^. 



250. BUCCINULUS AFFINIS. 



Buccinnlus affinis, A. Ad. 



This pretty species, more slender and elongated than B. solidulus, 

 is very finely tessellately painted with brown or black on a white 

 ground, having sometimes one or two white bands. Dredged in 

 Port Jackson. It also occurs in Japan. Length 9 lines. 



25 L Myonia concinna. 



Monoptygma co7icinna, A. Ad. in Thes. Conch. 

 An elongated white shell, spirally grooved throughout. Dredged 

 in Port Jackson. Length \ inch. 



252. *Leucotina esther. 



Leucotina esther, xlngas, P. Z. S. 1867, p. 110. 

 A small grey species, with rounded whorls finely striately grooved. 

 Dredged in Port Jackson. Length 2\ lines. 



Fam. Aplustrid.e. 



253. Hydatina physis. 



Bulla physis, Linn., Mart. t. 21. f. 196, 197. 



Hydatina filosa, Sebum. 



This fine shell may be readily distinguished by the narrow zebra- 

 like bands encircling its entire outer surface. It occurs in muddy 

 bays, especially at Vaucluse Bay, Port Jackson, and at Botany Bay. 

 At Moreton Bay it attains the length of two inches. The largest 

 Port Jackson specimen measures 1 inch 5 lines. 



254. BULLINA lineata. 



Bulla lineat a, V^'ooA, Index Test. Sup. pi. 3 ; Sow. Thes. Conch, 

 pi. 120. f. 2. 



B. lauta. Pease. 



? B. scahra, Chemn. 



No oue can fail to detect this ])rctty species, banded with two 

 Proc. Zool. Soc— 18G7, No. XV. 



