20 
The liiiig-c structure of both valves in tlie present and tyj)e species is 
practically the same, differing only in the degree of development of the 
various parts. 
I ffnd on examining Tenison Woods’ types from the Grey Hanges, 
that the shells termed hy him Avicula BarJdyi, Moore, vel. rcjlecta, Moore, 
var. Gilliattl, Ten. Woods, are all Maccoj/ella rejlccta with the exception of 
one (Tig. 0), and his var. Gilliatti is only the right valve oi 31. rejlccta, with 
sharp Costco. 
Log. — Mount Stuart lluu, Co. Tongowoko, North-West N. S. "Wales 
(7T. Gil Hat f) ; well, north of Milparinka, in the same district, at a depth of 
one hundred and fifty feet ( E. voii Lemlenfeld) ; well on Mount Poole Station, 
near Milparinka {A. Lang) ; Yandaminta, Co. Evelyn, in the same district 
{A. Lang) ; well on Dunlop Station, Darling lliver, in the same district. 
Colin. — Macleay Museum, University of Sydney ; Mining and Geo- 
logical Museum, Sydney. 
Maccoyella umbonalis, Moore, sp. 
(PL IV, Fig. 1.) 
Avicula umhonalis , Moore, Quart. Journ. (leol. Soc., 1870, XXVI, p. 240, t. 12, f. 2 and 3. 
Avicula wnbonalis, Etli. fil.. Cat. Austr. Foss., 1878, p. 107. 
Avicula lUnhonalis, Tate, Proc. Austr. Assoc. Adv. 8ci. for 1888 (188!)), I, p. 230. 
3LaCCOgella umhonalis, Eth. fiL, Geol. Pal. Q’land, &c., 1892, pp. 458 and 564, t. 22, f. 0 
and 7, t. 23, f. 4. 
Maccoyella umhonalis, Eth. til.. Bull. Geol. Survey Q’land, 1901, Xo. 13, p. 16. 
Qjjs \ — j/. umhonalis is represented by the interior of a fine left valve 
of considerable convexity, and robustness ; it is four and a half inches in both 
directions. The parts appertaining to the hinge structure Avere strong ; indeed, 
the general appearance of this valve goes to show that 31. umhonalis was a much 
more robust form than any other species of 3laccoyella . The specimen again 
exemplifies fhe tendency of the adductor scar in the left valve to become 
double or sub-reniform, and, as in the two preceding species, it is concen- 
trically striate. The ripply shell structure, so characteristic of this genus, is 
also beautifully shown on this interior. 
Loc. — Near Milparinka, North-West N. S. "V\^ales { Archdeacon B. L. 
King). 
Uor. — Lower Crctaceous. 
Colin. — Mining and Geological ]\[uscum, Sydney. 
