A manual of the Mollusca, or, A rudimentary treatise of recent and fossil shells . l, and ceras, , H. rotundum, Sby, sp. pi. III., fig. 11 (diagiam). * Fig. 57. Am. Maximiliani Klipstein. (= A. bicarinatus Mlinst). Trias, Hall-stadt (copied from Quenstedt). A, Profile shewing the numerous lobes and , suture of one side; v, dorsal saddle. 96 MAXUAL OF THE MOLLUSCA. Shell, spiral, sinistral; whirls separate. Bistr.^ 11 sp. Inf. oolite?—chalk. , Lam. Etym., turris, a tower, and lithos, a stone. Shell, spiral, sinistral; aperture often irregular. Distr., 27 sp. (
A manual of the Mollusca, or, A rudimentary treatise of recent and fossil shells . l, and ceras, , H. rotundum, Sby, sp. pi. III., fig. 11 (diagiam). * Fig. 57. Am. Maximiliani Klipstein. (= A. bicarinatus Mlinst). Trias, Hall-stadt (copied from Quenstedt). A, Profile shewing the numerous lobes and , suture of one side; v, dorsal saddle. 96 MAXUAL OF THE MOLLUSCA. Shell, spiral, sinistral; whirls separate. Bistr.^ 11 sp. Inf. oolite?—chalk. , Lam. Etym., turris, a tower, and lithos, a stone. Shell, spiral, sinistral; aperture often irregular. Distr., 27 sp. (Bronn). Gault—chalk. Europe. The turrUite was perhaps di-branchiate, hy the atrophy of the respiratoryorgans of one side. M. ;DOrbigny includes in this genus particular specimensof certain Lias ammonites which are very slightly unsynunetrical; the samespecies occur with both sides alike. He also makes a genus {heteroceras) oftwo tmTUites, in which the last chamber is somewhat produced and rejlexus (Quenstedt, T. 20, fig. 16) has its apex inflected and Fig. 58. Sutures of ha mites cylindraceus, Defr.* Hamites, Parkinson. Etym., hamus, a hook. Ex., H. attenuatus, pi. III., tig. 15. Shell, hook-shaped, or bent upon itself more than once, the courses sepa-rate. Distr., 58 sp. Neocomian—chalk. S. America (Tierra del Fuego)—Europe. The inner courses of this shell probably break away or are decollatedin the progress of its gi-owth (Forbes). M. DOrbigny has proposed a newgenus, hamulina, for the 20 neocomian species. Ptychoceras, ,., ptyche, a , P. emericianum, DOrb., pi. III., fig. 14. * Fig. 58. Space between two consecutive sutures of the right side, from a speci-men in the Brit. Mus. a. dorsal line. b. ventral. Baculite limestone, Fresville. GASTEROPODA. 97 Shell, bent once upon itself; the two straight portions in , 7 sp. Neocomiau—chalk. Brit. France. Baculites, , bacillus, a , B. anccps. PI. I
Size: 2003px × 1247px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectmollusks, bookyear185
