460 T. Davidson — Tertiary Brachiopoda. 



Fig. 18. — Section near Castle Head, Keswick. A, clay and soil with few stones : 



B, fine gravel ; C, pinel ; D, clay with a few houlders. These beds are 

 interwoven with and rest on an unknown depth of sand, with oblique and 

 waved lamination. 



19.— Section near Grange. A, gravel ; C, glaciated boss of rock running under 



river-gravel B. A«, gravel partly covered with screes farther south. 

 20. — Section above Barrow. 2, pinel ; 3, red loam. 

 21. — Pinel filling iip hollows and insinuated into crevices of shattered rock in 



Barrow Wood, Keswick. 

 22. — Pinel, upstream side of a roche moutonnee. 

 23. — Section of plateau of boulder- clay between Mosser and Loweswater. — Low 



Fell on the E., a low ridge on the W. 

 24. — Cross-section of the above from N. to S. 

 25. — Mode of occurrence of drift in Coledale Valley; A, the upper limit of 



erratics. 

 26. — Section of a reputed glacial moraine, near Lorton, covered with vegetation. 

 27. — Coast-section of drift, near Workington. 2, reddish-brown clay, with many 



large boulders in the lower part ; 3, sand and gravel ; 4, upper red loamy 



clay, with very few boulders. 

 28, — Appearance of stratification and fractures in the reddish-brown clay in the 



above section, 

 29. — Mode of occurrence of sand in one part of the above reddish-brown clay. 



C, laminated sand ; D, sand ; A, clay, with boulders ; B, clay, with 

 small stones. 



30. — Section of part of a limestone quarry, at Cleator Moor. A, surface nearly 

 cleared of clay, with a few remaining boulders ; B, sea-worn surface. 



II. — On Italian Teetiary Beachiopoda.^ (Paet III.) 



By Thomas Davidson, F.R.S., F.G.S., etc. 



(Plate XXI.) 



48. Rhynchonella lipartita (Brocclii), sp., PL XX., Fig. 1, 2, 3. 

 Anomia lipartita (BroccM), Conch. Foss. Subap., p. 469, pi. x., fig. 7, 

 1814. Terelratula incurva (Von Buch), Ueber Tereb., pi. ii., fig. 40, 

 1834. Terelratula plicato-dentata (Costa). Fauna del Eegno di 

 Napoli, p. 27, pi. v., fig. 4, 1851. 



In his description, Brocchi does not fail to observe that this is a 

 very variable species. It is more or less transverse or elongated, 

 and while some specimens are entirely smooth, others present from 

 two to four ribs near the front in both valves, and about a similar 

 number on each of the lateral portion of the shell, but these ribs are 

 short and do not seem to extend far in the direction of the beaks. 

 The ventral valve is gibbous, with a well-defined fold, while in the 

 dorsal valve the sinus is broad and deep. In Brocchi' s typical form 

 the shell is smooth, while to the more or less plicated specimens 

 Costa has applied the specific name of plicato-dentata, but, as was 

 well shown by Philippi (Enum. Moll. Sicil., vol. 2, pi. xviii., fig. 5, 

 1844), there exists every passage in shape between the more trans- 

 verse and smooth specimens to those that are more elongated and 

 plicated near their margin. Rh. lipartita is also stated by Meneghini 

 and others to occur in the Middle (?) and Upper Miocene, as well as 

 in the Older Pliocene. From the Miocene it is quoted by the last- 

 named gentleman from Palazzo near Siena, -Parlascio and St. Loreiizo 

 in Tuscany, and by Brocchi from the Piacentino ; while Philippi, 



^ Concluded from page 408. 



