History of British animals - University of Guam Marine Laboratory

Ammonita. MOLLUSCA. CEPHALOPODA. 24783. A- fibulata.— Depressed, ribbed ;inner whorls almost wholly exposed,sides of the whorls flattened, their inner margins plain ; ribs numerous, unitedin pairs by smooth solid spines.— Sower. Min. Conch, t. ccccvi. f. 2—InLias at Whitby.84. A. catena Depressed, furnished with two rows of short tubercles uponeach side ;whorls C or 8, smooth, with flat sides, the inner ones exposed ;front rather convex; aperture square.— Sower. Min. Conch, t. ccccxx.—Middle Oolite, near Abingdon, Berkshire.85. A. cristata Lenticular flattened ; carinated ;keel thin, deeply notched;inner whorls concealed—Sower. Min. Conch, t. ccccxxi. f. 3.—MiddleOolite, Weymouth.86. A. Johnstoni Discoid ; whorls 6 or 8, two-thirds exposed, with numerousshort straight costae upon the exposed parts ; front plain—Sower.Min. Conch, t. ceccxlix. f. i.—In Lias at Watchet.87- A. varicosa Depressed, costated ; inner volutions exposed carinatedwhen ; young, and furnished with an irregular row of tubercles upon the inneredges of the whorls ; costse curved, large, obtuse, in old shells crossingthe 5.— front ; carina distinct ; aperture oblong.— Sower. Min. Conch, t. ccccli. f.4, Sandstone, Blackdown.88. A. rotiformis.— Depressed, ribbed, carinated, a furrow upon each side ofthe keel; inner whorls exposed, many ribs ; many, strong, each terminatingin a tubercle ; aperture nearly square.— Sower. Min. Conch, t, ccccliii.89. A. multicostata.— Depressed, costated, carinated, a furrow on each side ofthe keel ; inner whorls exposed, few ; ribs strong, sharp, numerous, with atubercle near the end ofeach ; aperture oblong,— Sotver. Min. Conch, t. ccccliv.—In Lias, near Bath.iana— 90. A. Humphries Discoid, thick, radiated; inner whorls exposed; frontrounded ;radii large, numerous, rising into a tubercle on each side the whorl,where they branch into three ;aperture arched, oblong. Sower. Min. Conch,t. D. f. I.— Inferior Oolite, Sherborne.91. A. contractu.— Subglobose, umbilicated, radiated ;radii rising into tuberclesupon the border of the umbilicus, there dividing into three or four branchesthat pass over the much rounded front ;aperture oblong, arched ; inner whorlsalmost concealed.— Sower. Min. Conch, d. f. 2. Dundry,92. A. Listeri.— Subdiscoid ; inner whorls partly concealed front ; convex,broad, crossed by numerous small ribs ; sides inversely conical, ribbed ; ribsterminated by tubercles.— Mart. Pet. Derb. t. xxxv. f. 3 Sower. Min. Conch.Dr. f. 1.— Carboniferous Limestone.93. A. longispina.— Discoid, thick, with two concentric rows of spines uponeach side ; whorls few, half exposed ; front round. — Sower. Min. Conch, t. m.f. 2 Weymouth.94. A. Taylori.— rDiscoid, radiated ; inner whorl exposed; radii about 12, withone large spiniform tubercle upon each side of the front, and one or two slightelevations on the rounded sides of the whorls ; aperture nearly round—Sower.Min. Conch, t. D. xiv. f. 1.— In clay, Happisburg Cliff.95. A. hippocastanum — Gibbose, umbilicated, radiated, spinose; inner whorlsalmost concealed ;radii ten or more, unequal, much elevated, each furnishedwith three tubercles upon the front, and most of them with two obtuse spinesupon each side; aperture transversely ovate.—(Sower. Min. Conch, t. pxiv.f. 2—In chalk, Dowlands.