A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) . er specimens in the Wall-cases begin with Liassic forms in Cases 12 and 11, pass toBajocian in 10, and Oxfordian in 9; then, crossing theGallery, continue with the uppermost Jurassic in Case 6,Lower Cretaceous in 5, and Upper Cretaceous species in4 and 3. We begin with the From the Himalayan Trias are shown Ptychites, Carnites, and Gym-nites, smooth shells, with suturesnot far removed from those ofgoniatites. Among many specimensfrom the Upper Tr
A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) . er specimens in the Wall-cases begin with Liassic forms in Cases 12 and 11, pass toBajocian in 10, and Oxfordian in 9; then, crossing theGallery, continue with the uppermost Jurassic in Case 6,Lower Cretaceous in 5, and Upper Cretaceous species in4 and 3. We begin with the From the Himalayan Trias are shown Ptychites, Carnites, and Gym-nites, smooth shells, with suturesnot far removed from those ofgoniatites. Among many specimensfrom the Upper Trias of Hallstadtin Austria, Monophyllites and Bha-copliyllites, which have primitivesutures with leaf-like saddles, startthe line of Phylloceratidae. InFinacoceras Metierniclii, on the otherhand, the sutures have already ac- quired an extraordinary complexity, Fig. nodosus ^est shown in some large speci-from the Muschelkaik. mens and a Section in Wall-case 12. Sutures of rather simpler type areclearly shown in specimens of Cladiscites multilobakis. FromSt. Cassian in the Tyrol come the roughly ridged shells of GUIDE FOSS. INVERT. PLATE VII.
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Keywords: ., bookauthorbr, bookcentury1900, bookdecade1900, booksubjectfossils
