60 Transactions of the Boyal Society of South Africa. 
Genus OAMPTONECTES, F. B. Meek, 1864. 
Check List of the Invertebrate Fossils of North America — Smith- 
sonian Miscellaneous Collections, 1864, p. 39. 
Camptonectes cf. CURVATUS, Geinitz. ' 
Plate III., figs. 5, 6. 
Pecten curvatus, Geinitz, Versteinerungen von Kieslingswalda, 1843, 
pi. 3, tig. 13, p. 16. 
Camptonectes cf. cm'-vatus, E. B. Newton, Proc. Malac. Soc. London, 
1907, vol. 7, pi. 24, fig. 15, p. 284. 
Observations. — This shell consists of a small left valve attached to 
the matrix displaying external characters. The auricular expansions 
are partially preserved, the anterior one having apparently broken 
away from the margin during fossilisation and stationed itself just 
below its normal position on the test, whilst only the slightest 
indication remains of the posterior ear. The ornamentation of the 
valve seems to connect it very closely with the Pecten arcu- 
atus of Goldfuss, non J. Sowerby (Petrefacta Germanise, 1833, 
vol. 2, pi. 91, fig. 6, p. 50), from the Upper Cretaceous rocks of near 
Aix-la-Chapelle (= Aachen), Germany — a species which Mr. Henry 
Woods recognises as equivalent to the curvatus of Geinitz [Mon. 
Pal. Soc, 1902, pi. 29, fig. 7, and pi. 37, fig. 16, p. 159). Closely 
arranged, bold, radiating ribs are observed curving outwards on each 
side, commencing from the centre where they are extremely fine and 
difiicult to see without the aid of a lens ; the minute grooval 
separations are obscurely punctated. Just before reaching the 
margin the ribs bifurcate, and consequently become finer and more 
numerous — a feature specially well seen on the postero-lateral region ; 
fine annulations of growth also add to the sculpture of this specimen. 
Another point of interest is that it possesses two prominent red 
bands diverging from the umbo, and which probably extended to the 
ventral margin, which undoubtedly represent the position of original 
colour-markings. The colour of these bands as now preserved need 
not necessarily be the same as characterised the shell in life, as 
most probably the chemical agencies at work during the process of 
fossilisation entirely altered the nature of the original pigment. 
With the view of exhibiting these so-called colour-bands, this speci- 
men was recently figured among some other fossil mollusca exhibiting 
various markings attributable to colour (E. B. Newton, Proc. Malac. 
Soc. London, 1907, vol. 7, pi. 24, fig. 15, p. 284). Judging from the 
figures of Camptonectes curvatus, as determined by Stoliczka from 
the Ariyalur and Trichinopoly groups of Southern India. (Creta- 
ceous Pelecypoda, Southern India, Pal. Indica, 1871, pi. 31, figs. 15, 
