66 Annals of the South African Museum. 



1902. Pecten (Camptonectes) cottaldinus H. Woods, Mon. Cret. 

 Lamell. Engl., vol. i., part iv., p. 156, pi. xxix., figs. 1-3. 

 (Palaeontographical Society.) 



A specimen collected by Messrs. Eogers and Schwarz agrees so 

 closely with Pecten cottaldinus that it can only be considered identical. 

 It is a right valve in which, unfortunately, the anterior ear is the 

 only portion which retains the shell wholly preserved ; the remainder 

 of the valve is for the most part in the form of a cast. Here and 

 there, where some of the inner layers of the shell are adhering to 

 the cast, a faint and broad concentric waving is seen ; this, however, 

 does not seem to be markedly impressed upon the cast and appears 

 to die out towards the posterior margin. It probably stands in 

 relation to shell structure and not to surface sculpture, for the 

 faint folds are too broad to correspond with the concentric surface 

 markings which are exhibited by European specimens. The specimen 

 agrees with P. cottaldinus in all characters of proportion and outline, 

 as well as in the shape and relative size of the ears and the deep 

 byssal notch. 



Dimensions. Length 38 mm. ; height 42 mm. 



Occurrence. Dunbrodie, in the cliff below the old school-house on 

 the right bank of Sunday's Eiver (305, 306). 



Remarks. This form is well distributed in the Neocomian (princi- 

 pally the Hauterivian) and Aptian of Europe, and it has also been 

 recorded by G. Muller from the Neocomian of German East Africa. 



PECTEN (CAMPTONECTES) PROJECTUS Tate. 



Plate II., figs. 5, 5a. 



1867. Pecten projectus E. Tate, Quart. Journ. Geol. Soc., vol. xxiii., 

 p. 155, pi. ix., fig. 6. 



Supplementary Descriptive Note. The ears are very unequal and 

 the byssal notch deep. The delicate ornamentation of the valve 

 surface presents a very variable aspect in different states of preser- 

 vation, and under different conditions of illumination and enlarge- 

 ment. In frequent instances it appears to consist of fine, radiating, 

 impressed linear striae, diverging from the middle line and increasing 

 by bifurcation when traced towards the valve margins. When the 

 surface is not very perfectly preserved, these lines may appear to be 

 separated by plain flattened interspaces, while the lines themselves 

 may exhibit an imperfect punctate structure. Where the surface is 

 perfectly preserved, however, the ornaments are observed to be of 



