. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 54 Prof. J. D. Dana on two Oceanic Species of Protozoans. VI.—On two Oceanic Species of Protozoans related to the Sponges. By James D. Dana*. The Spharozoum figured below (fig. 1 a) was collected by the writer in the Pacific, near latitude 30° N. and longitude 178° W., during a calm, on the 26th of May, 1841. Fig. 1 a represents the gelatinous globule of natural size. The ocean's waters were filled with this species and another represented in fig. 2 a. The minute dots covering
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 54 Prof. J. D. Dana on two Oceanic Species of Protozoans. VI.—On two Oceanic Species of Protozoans related to the Sponges. By James D. Dana*. The Spharozoum figured below (fig. 1 a) was collected by the writer in the Pacific, near latitude 30° N. and longitude 178° W., during a calm, on the 26th of May, 1841. Fig. 1 a represents the gelatinous globule of natural size. The ocean's waters were filled with this species and another represented in fig. 2 a. The minute dots covering the globule, one of which is magnified in fig. 1 b, were closely crowded, as shown in fig. 1 a. In this respect the species difi'ers widely Fig. 1. Fig. from the figure of a species by T. H. Huxley in the ' Annals and Magazine of Natural History,' viii. 433, pi. 16; and as it hence appears to be distinct, the writer has named it Sphterozoum orientate. About the dots, or ocelliform spots (zooids), the spi- cules (supposed to be siliceous) were very numerous and much branched, as in fig. 1 b. The general mass had an exceedingly faint bluish tinge; the centre circle of the ocelliform spots was of the same tint, while the ring around was of a veiy faint ochreous shade. The globules represented on the ocelliform spots in fig. 1 b were yellow. The other species (fig. 2 a) had the same general colour, and similar ocelliform spots as to form, colour, and numbers, without the spicules. Pigure 2 b represents one of the ocelliform spots; the dots in the surrounding mass correspond to minute yellow globules or cells. This species is included with the Sphcerozoum under the genus Thalassicolla of Huxley. This name has been since restricted to Huxley's T. nucleata, and the name Collo- sphcBra applied to forms much like fig. 2, by Miiller. The mass was less firm to the touch than that of the preceding. A fuller examination of this and the related species is required to decide whether
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