228 ORGANIC REMAINS. 



The deeply sulcated shell, Fig. 17, imbedded in a piece of dogger, 

 may be noticed here; though it is so much entangled in its matrix, 

 that we cannot decide, whether it is a tellen, a venus, a mya, or a 

 shell of some other genus. 



Venus. Under this genus we have also but little to introduce. 

 Fig. 6, PI. VIII, is a handsome cast of a venus from the dogger. 

 It resembles the v. rugosa. A beautiful flat lenticular shell resem- 

 bling V. edentula, occurs in the nodules in the dogger beyond Peak, 

 at the place where the alum shale first rises to day. The inside of 

 it has a rich shining surface, somewhat nacrous. 



Anomia. This genus is one of the most abundant in our district, 

 occurring in the chalk, the oolite, the various kinds of shale, the 

 calcareous sandstone, and the ironstone. The shells are chiefly 

 distinguished by a hole in the point of the upper or larger valve ; at 

 least most of the species foimd here have the beak perforated. 



Fig. 13, PI. VIII, is from the chalk. It is the terebratula semi- 

 glohosa of Sowerby, Tab. 15, Fig. 9; being a small shell, nearly 

 globular, distinguished by the remarkable waved line, marking the 

 junction of the two valves. The middle of each valve is smooth. 



Fig. 9 is also from the chalk. It corresponds very nearly with 

 terebratula intermedia of Sowerby, Tab. 15, Fig. 8. It has in some 

 places a slight tinge of red or brown. Fig. 12 agrees with Sowerby's 

 t. tretr'dedra, Tab. 83, Fig. 4 ; which seems to be the same species 

 with his t. media, Fig. 5. It abounds in the sandstone and 

 ironstone bands, belonging to the aluminous strata; where also 

 Sowei'by's t. latej-alis, or t. crumena ( for they seem to be varieties of 

 one species) may often be met with. 



No. 11 is a smaller shell, not unlike No. 12, but much more 

 flat ; and instead of a sudden rise of part of its plaits or ribs, it is 

 distinguished by a gentle undulation of the whole ; the plaits, which 

 are numerous and small, proceeding round the base, in an unbroken 



