95 



Terebratulina cancellata, Koch. 



Terebratula cancellata, Koch, in Kuster, Conch. -Cab., 1843, 

 Band vii., Abt. i., p. 35, pi. 2b, figs. 11-13. Type locality- 

 Western Australia; So^yerby, Thes. Conch., 1846, p. 358, pi. 

 lxxi., figs. 93-95, no locality cited. 



Terebratula (Terebratulina) cancellata. Reeve, Couch. Icon., 

 1860, pi. iv., fig. 13. 



Terebratulina cancellata, Dall., Proe. Acad. Nat. Sci., Phila- 

 delphia, 1873, p. 179. Davidson, "Challenger" Rep. Zool., 1880, 

 vol. i., p. 37, pi. i., figs. 11-16, 35 to 40 fathoms, Ba&s Strait; 

 also, Trans. Linn. Soc, Lond., 1886, Recent Brachiopoda, p. 35, 

 pi. vi., figs. 1-8: Hedley, Memoirs Austr. Mus., 1902, vol. iv., 

 p. 288, 50 to 60 fathoms, off Jibbon ; Hedlev and May, Records 

 Austr. Mus., 1908, vol. vii., No. 2, p. 114, 100 fathoms, off Cape 

 Pillar, Tasmania. 



Dredged alive at 15 fathoms in Backstairs Passage, 4; 

 at 16, 17, 18, 20, and 22 fathoms, very many; at 30 fathoms, 

 off Corney Point, Spencer Gulf, 17 ; at 40 fathoms, off Beach- 

 port, 3. alive and 11 dead, all small ; at 55 fathoms, off Cape 

 Borda, 1 alive 11 dead, all small, and at 60 fathoms, 10 

 dead, small ; at 90 fathoms, off Cape Jaffa, 2 minute, dead ; 

 at 110 fathoms, off Beachport, 4 minute and 13 small, dead, 

 and at 150 fathoms, 3 minute. It occurs in both our gulfs 

 and both straits, and has its habitat from 15 to 30 fathoms. 

 It may occur in shallower waters (in which I have dredged 

 very seldom), as it has been taken in Port Jackson by 

 Brazier in 3 and 7 fathoms. The "Challenger" took it 

 abundantly in 35 to 40 fathoms. Beyond that depth only 

 very immature specimens have been obtained by me. 



Terebratulina cavata, n. sp., Verco. PI. xxviii., 

 figs. 1 to 5. 

 Shell thin-walled, translucent, oval, widest a little in 

 front of the middle. Ventral valve very little deeper than 

 the dorsal, convex longitudinally, especially towards the, 

 beak, transversely convex, slightly centrally flattened ; 

 lateral edges slightly concave, front slightly convex. Beak 

 very short, obliquely truncated. Foramen of moderate size, 

 incomplete, the anterior eighth formed by the back of the 

 dorsal valve, bevelled from the outer to the inner edge. 

 Deltidial plates narrow triangular, not meeting in the middle 

 line. Teeth small, projecting inwards and backwards. Dor- 

 sal valve convex longitudinally and transversely, slightly 

 prominent centrally, and sloping at the sides; lateral edges 

 convex, anterior edge slightly concave. Hinge line narrow 

 and straight. Tooth sockets well developed, excurved, and 

 pointed ventrally. Crura rather short and stout. Loop 

 annular, completed by a ventrally convex ventral crural 



