. A contribution to American thalassography : Three cruises of the United States Coast and geodetic survey steamer "Blake", in the gulf of Mexico, in the Caribbean sea, and along the Atlantic coast of the United States, from 1877 to 1880. Blake (Steamer); Marine animals -- Atlantic Ocean; Marine sediments. 124 THREE CRUISES OF THE ";. Fig. 415. —Holopus Rangi. specimen was attached to a piece of rock, and was not detected until it had become dry. The general shape is a contracted truncated cone, with irregular contour of attachment. The sur- face is granulated or shag
. A contribution to American thalassography : Three cruises of the United States Coast and geodetic survey steamer "Blake", in the gulf of Mexico, in the Caribbean sea, and along the Atlantic coast of the United States, from 1877 to 1880. Blake (Steamer); Marine animals -- Atlantic Ocean; Marine sediments. 124 THREE CRUISES OF THE ";. Fig. 415. —Holopus Rangi. specimen was attached to a piece of rock, and was not detected until it had become dry. The general shape is a contracted truncated cone, with irregular contour of attachment. The sur- face is granulated or shagreen- like, with a few small tubercles scattered over it. The great peculiarity of the Caribbean fauna is the abundance of ten-armed Comatulae representing both the principal genera. About two thirds of the Antedon species and three fourths of the Actinometrse belong to this simple type. In this respect the contrast with the Comatula fauna of the Eastern seas is very marked. Ten-armed forms of both genera are there decidedly in the minority. Of all the Antedon species dredged by the Coast Survey ex- peditions, that with the widest range within the Caribbean Sea is the little ten-armed Antedon Hagenii Pourt. It was obtained by the " Blake " on the Yucatan Bank, and also at various sta- tions between Dominica and Grenada, at dif- ferent depths between 75 and 291 fathoms ; while Pom-tales dredged it in great abundance at several localities in the Straits of Florida. Among the large number of individuals of An- tedon Hagenii from the Straits of Florida, Car- penter noticed a few examples of two new Ante- don species. One of them is distinguished by having enormous lancet-like processes on the lower joints of its oral pinnules ; while the other is a very exceptional type, with no pin- nules at all upon the second and third bra- chials, though those of the other arm-joints are developed as usual. This is a singular con- dition, which occurs but rarely among the Co- matuls
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