692 
becomes a very distinct depi’ession on the abactinal surface, on which the line o t e 
plates are well marked ; pores in a vertical row, slightly oblique, and their zones sunken. 
Interambulacra have two rows of primary tubercles, each row being flanked again on 
each side by a vertical row of secondaries, all small aud imperforate, both primaries an 
secondaries surrounded by circles of granular tubercles, which are frequently con- 
nected with the main tubercle by a ridge. Primaries of the ambulacra in two vertica 
rows, each close to its poriferous zone ; secondaries not so visible, but the rings o 
granules are very manifest, with an indented vertical line of suture in the centre. 
Actinal opening larger, with conspicuous but not deep indentations. Diameter, sixteen , 
altitude, six millim. (^Ten. Woods.) 
Ols. Mr. Woods appears to consider this near the TemnecUnus Uneatus, 
Duncan,* from the Mordialloc beds, Hobson’s Bay, but, again, he adds— “ The nearest 
aflBnities are T. glohosus^ of the British Crag-” The species is provisionally named on y. 
Loo. and Horizon. Yule Island, New Guinea {The late Sir W. Macleay— 
Macleay Museum, University of Sydney) — Lower Pliocene ? 
Family — LAGANIDA2. 
Gtenus — PEROHJELLA, Gray, 1855. 
(Cat. Recent Echini Brit. Mus., Pt. 1, 1855, p. 13.) 
Peronelia decaooealis, Lesson, sp. 
Peronella deoagonaUs (Lesson), Agassiz, Revision (Echini 111. Cat. Mus. Comp. Zool. Harvard Coll., 1872, 
No. vii., Pts. 1 and 2, p. 148. 
Ten. Woods, Proc. Linn. Soc. N. S. Wales, 1877, ii., Tt- 2, p. 126. 
Ols. This has been recognised by the late llev. J . E. Tenison Woods as a 
fossil from Yule Island, New Guinea. He says— “ The specimens, two in number, are 
extremely thinuind concave on the actinial side, but they are both young specimens, and 
one scarcely above an inch in diameter.” 
Loc and Horizon. Yule Island, New Guinea {The late Sir W. Macleay— 
Macleay Museum, University of Sydney) — Lower Pliocene? 
Sub-Kingdom — MOLLTJ SC A. 
Class — Pelecypoda. 
Order — OSTRACEA. 
Family— PECTINID^. 
Genus— PEGTEH, O. F. Muller, 1776. 
(Zool. Danicffi Prod., p. xxxi.) 
Pecten jroTiE-&niNEjE, Ten. Woods. 
Feclen novce-gumece. Ten. Woods, Proc. Linn. Soc. N. S. Wales, 1877, ii., Pt. 3, p. 267. 
So Char Shell regularly orbicular, cquivalve, regularly convex, but not 
globose, equilateral, and symmetrically rounded at the margin ; 
being a little obliquely indented at the edge, but otherwise almost equal, and rather 
largf and with from eight to ten very granular ribs; surface with from twelve to 
Quart. Joum. Geol. Soc., 1877, xxxiii., pp. 16 and 65. t. 3, f. 3-5. 
