The book Natural History was written by author British Museum (Natural History) Here you can read free online of Natural History book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Natural History a good or bad book?
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thick. Basal skeleton consisting of spicules transversely arranged, and crossing each other in an irregular manner. Spicules. Large, smooth, slightly curved styles, or occasionally strongyles, 2240 X 40/i. Cortical tyles, with small spheroidal head, short neck, fusiform straight shaft, varying in length from 140 to 350 jx, and in thickness from 12 to 19 /x. A few very slender styles scattered in the choanosome, 70 X 6 /x, with head and neck making an angle with the shaft. Some medium-sized cort...ical tyles in the oscular papilla with long, oval heads. Tyles of the stellate clusters, slender, with the head making an angle with the shaft, 20T) x 15 /x. There are fourteen large specimens and five very small ones of this species. The largest is 8 cm. in diameter and 4 ' 5 cm. high ; and the smallest, which is triangular, VOL. IV. 2 16 R. KIRKPATRICK. is 8 mm. high, 8 mm. in length at the base, and 4 mm. in thickness. In some the pile has been rubbed oflf, exposing the smooth, fleshy cortex.
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