Transactions of the Connecticut Academy of Arts and Sciences . ut one-quarter orone-third of ^n inch dicvo^s [Orbicella cavernosa), forms large solidhemispheres, but it only lives on the outer reefs. The smaller kind{0. anmdaris), with calicles about one-eight of an inch across, is alsofound chiefly on the outer reefs, but is more common. The Sider-astrcea radians, which has crowded, shallow, confluent stars, aboutone-eighth of an inch across, is very abundant both in shallow waterand. on the reefs. It grows in solid, heavy, rounded masses up to afoot or more across. Porites astreoides forms i
Transactions of the Connecticut Academy of Arts and Sciences . ut one-quarter orone-third of ^n inch dicvo^s [Orbicella cavernosa), forms large solidhemispheres, but it only lives on the outer reefs. The smaller kind{0. anmdaris), with calicles about one-eight of an inch across, is alsofound chiefly on the outer reefs, but is more common. The Sider-astrcea radians, which has crowded, shallow, confluent stars, aboutone-eighth of an inch across, is very abundant both in shallow waterand. on the reefs. It grows in solid, heavy, rounded masses up to afoot or more across. Porites astreoides forms irregular roundedand tubercular masses, up to tAvo feet in diameter, covered withminute stars, about yg- of an inch or less in diameter. It is usuallydark yellowish brown when living. (See Part V.) At the western end of the group the reefs cover a very extensivesemicircular area, extending 7 to 9 miles from land, with a perfectlabyrinth of broken and detached reefs, but more continuous towardtheir outer margins. This reef area is larger than all the dry Figure 28.—Wreck Hill, as seen from the Sea, bearing N. % East; after Findlay. Among the most dangerous of these reefs aie the Chub Heads,which lie 9 miles from the shore at Wreck Hill ; Long Bar, of whichthe south part is 6 miles from Gibbs Hill Light; andSouthwest Breaker, on which the sea always breaks, and which lies1^ miles from the shore, and about south from Wreck Hill, which isa rather conical high hill, standing detached from the other hills, atthe extreme western end of the main island. When seen from thesea it appears dark colored. From the southwest it appears flat-tened at the top, but from the south it is conical. It is usually thefirst land made in approaching the islands from the westward. () The modern sand-dunes in the region of Elbow Bay, East ofGibbs Hill Light, are conspicuous at sea, from a long distance, byreason of their white color, and are called the Sand Hills. 486 A. E. Verrill
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectscience, bookyear1866
