History of British animals - University of Guam Marine Laboratory

2, 3— Chalk Marl. ** Spires dextral.250 MOLLUSCA. CEPHALOPODA.Baculita.2. T. tuberculata.— Whorls beset with one row of large obtusely conical tubercles,and three rows of smaller tubercles below them Sower. Min. Conch.t. lxxiv—Chalk Marl.3. T. undulata.— Whorls with many undulating ribs, mostly continuingfrom the upper to the lower part of each.— Sower. Min. Conch, t, lxxv. f. 1,4. T. obliqua.— Upper part of ths whorls contracted ; below the middle isplaced a row of large oblique tubercles Sower. Min. —Conch, t. lxxv. f. 4.In Green Sand.Gen. BACULITA.— Shell hooked or bent into two parallellimbs ;syphon near the outer edge— Hamites of Parkinsonand Sowerby.* Without spines or tubercles.1. B. compressa.— "Depressed, curved at right angles; undulations sharp,slightly waved, most prominent at the back Sower. Min. Conch, t. lxii. f. 7>8.— In Chalk Marl, Folkstone.2. B. tenuis Slender, depressed, undulation obtuse, slightly waved, disappearingon the back of the limbs. The undulations are irregular, somereaching nearly to the back, others only half way ;tapering—Sower. Min.Conch, t. lxi. f. 1.—In clay in the Chalk Marl, Folkstone.3. B. rotunda. — Aperture round, undulations obtuse, annular, numerous; the curve of the shell very gradual.— Soiver. Mill. Conch, t. lxi. f. 2, 3.—Chalk Marl, Folkstone.4. B. attenuata.— Suddenly attenuated just below the curve ; undulationsobtuse, numerous—Sower. Min. Conch, t. lxi. f. 4, 5 Mant. Suss. 93. t. xix.£ 29 Chalk Marl, Folkstone.5. B. maxima.— " Slightly depressed undulations even, ; rounding, disappearingat the back ; curvature gradual." (S.)— Parkinson's Organic Remains,iii.p. 144. t. x. f. 4. Sower. Min. Conch, t. lxii. f. i—Chalk Marl, Folkstone.6. B. intermedia.— " Depressed, undulations obtuse, annular, waved, cur,vature rounding." (S)—Park. Org. Rem. iii. p. 143. t. x. f. 1, 2 Sower.Min. Conch, t. lxii. f. 2, 3, and 4, except the right hand figure.— In ChalkMarl, Folkstone.7- B. gibbosa.— "j Gibbous, undulations acute, prominent at the front, ratherdistant." Very flat at the back. — Sower. Min. Conch, t. lxii. f. 4.righthand figure.— Chalk Marl, Folkstone.8. B. Parkinsoni.— Curvature obtuse, annulations distinct. — Park. Org.Rem. iii. p. 144. t. x. f. 5. — In Green Sand, Wiltshire.The Hamites adpressus of Sower. Min. Conch, t. lxi. f. 6. " Aperture round,lesser limb acute, pressed close to the larger ;no undulations ; septa? distantnotwaved," from Folkstone, is a shell still in obscurity.*K-Wiih spinesor tubercles.0. B. armaia.—" Flatted ;undulations simple, every second or third armedwith a large thick spine on each side near the front."— Soiver. Min. Conch.t. clxviii. and t. ccxxxiv. f. 2—In Chalk Marl, Oxfordshire and Sussex.