90 
South -histrallan Shells. 
s.A. x.\r., Yor.. XIV 
May. 1933 . 
diam. 1.6 mm. South of Ca| c \^'i]cs in 100 fathoms. We have 
not seen specimens. (Type locality — 800 fatlioms, lhirt\'-fivc 
miles east of Sydney. Phiiuie trapezia Hedley is related but is 
narrowed, thin, and possesses a distinct and characteristic angle, 
AGL AJIDAE ( == Dorhlndae). 
Shell very thin, fragile and degerenate, wholly internal, j:osterior 
and generally composed of a minute spire with a single free 
v\'horl; sometimes wholly membranous, stancrimes partly calcified, 
rarely wholly calcified. Distribution — All tropical and warm lein- 
perate seas. Fossil — (doubtful). Animal bearing two dorsal 
shields, with a furrow between them, the anterior shield has free 
margins but not usually developed into tentacles, the posterior 
lias the margins less developed, but is produced behind into two 
pu'ocesses; foot broad, truncate before and behind, and continued 
an each side into a fairly ample parapodium, from which it is 
not clearly divuded; parapodia tiitddcd behind, the j-josterior part 
of the body hangs over or rests on them; organs analogous to 
rhinophores are often present in the form of lamellae under the 
sides of the head-shield or lumps with bristles around the mouth; 
branchia a large bipinnate plume, posterior and on the right 
side. No jaws, radula, or stomach-plates; there is, as a rule, 
a large, sometimes colossal, buccal bulb with thick muscular walls. 
Aglaja Rcnier 1807. d’hc shell description is that of the 
family. f ype — A. tricolorala Renicr. I9istribution — Mediter- 
ranean, cast coast of Africa. Australasia, ja]''au, Sandwich Islands, 
west coast of Americas, West Indies. 
A. troubridgensis \’erco 1900. PI. I. fig. 17. “The Trou- 
hridge Island Aglaja.’' Shell detached, depressed conic, of about 
Iwo-and-a-half tvhorls; apex somewhat lower than the rest; inner 
margin not uniformly cuiA^ed. thick, opaque white to an irregular 
depth varying from two to four millimetres: outer j^art thin, 
ti'anslucent, witli a membranous edge; surface irregularh' cor- 
rugated by obliquely retrocurrent folds, A\'hich roughen the inner 
margin; internally somewhat rugose. (Greatest diam. 21, smallest 
15, hcigb.r 21 mm. (dVpe locality — ^Ih'oubridge Island, S. .Australia, 
among th.c rocks; aniirials collected by Miss Fraser; shells only 
preserved, ihis species and A. niarmorala Smith 1884 (Queens- 
land). ai’e the only representatives of the family in .Australia, 
according to the various fists of Australian shells published to date. 
A. Hneolata lisfed and figured by H. k .A. Adams 1858 
from Australia fCIould), ilte shell of which is mtknown. is 
recorded here in the hope that it may be localised later. “No 
description (of A, Hneolata) lias been publisliedpo my knowledge. 
As figured by A. Adams, the shields and outside of parapodia 
ai'L- transversely lineolate with purplish on a light brown ground; 
