. Bulletin - United States National Museum. Science. 118 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. or the ducts of the neural glands. The remarkable absence of these organs in this species may be associated with the great rotation of the ganglion. It is of interest as showing that these organs are not of indispensable physiological importance in the Salps, for this species, which lacks these organs, is the most abundant and widely distributed of all the species in the family. THALIA DEMOCRATICA, aggregated zooid: Philippine form. Characteristic specimens of the Philippine form of aggregated
. Bulletin - United States National Museum. Science. 118 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. or the ducts of the neural glands. The remarkable absence of these organs in this species may be associated with the great rotation of the ganglion. It is of interest as showing that these organs are not of indispensable physiological importance in the Salps, for this species, which lacks these organs, is the most abundant and widely distributed of all the species in the family. THALIA DEMOCRATICA, aggregated zooid: Philippine form. Characteristic specimens of the Philippine form of aggregated zooids of this species are in the collections of United States National Museum as follows: Cat. Nos. 6473 (Holotype) and 6474 (Paratype) U. S. N. M. (Ag- gregated, Philippine form), Albatross station D. 5456; June 7, 1909; 142 fathoms; surface temperature, 86° F.; two specimens. In the prevalent form of the aggregated zooids of Thalia democratica from the Atlantic coast of the United States (fig. 107, A and B) there are but few tubular protuber- ances of the mantle into the test. At one of the postero -lateral angles of the body there is one which protrudes slightly beyond the general contour of the test. There are gener- ally an unequal pair in front not protruding beyond the general contour of the test. If there are others the}' are generally weakly developed. On the other hand, in the Philippine collections of this species, made by the Bureau of Fisheries steamer Albatross, there are very numerous specimens of a form of aggregated zooid, which show more numerous and much more developed mantle protuberances (fig. 107, C). This zooid strikingly resembles Traustedtia radiata in musculature, form of "nucleus," and "; This resemblance is so marked that one, at first glance, thinks these zooids to be the aggregated form of the latter species. The testis in these aberrant Philippine zooids is readily seen to be in the form of four lobes surrounding t
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