. Bulletin - United States National Museum. Science. .] A TAXONOMIC STUDY OF THE SALPIDAE METCALF. 143. This is seen in the muscles, which are equally reduced in the two phases of the life history. The gut also is in the same condition in the two. In both forms of Pegea, as in Thetys vagina and Iasis zonaria, all the rod-cells in all the eyes of the aggregated zooids are irregular and degenerate. Traustedtia, new subgenus. This subgenus includes the most highly modified members of the family. It has been studied by Quoy and Gaimard (1826-1834), Traustedt (1893), Apstein (1894, b, 1904, 1906, b
. Bulletin - United States National Museum. Science. .] A TAXONOMIC STUDY OF THE SALPIDAE METCALF. 143. This is seen in the muscles, which are equally reduced in the two phases of the life history. The gut also is in the same condition in the two. In both forms of Pegea, as in Thetys vagina and Iasis zonaria, all the rod-cells in all the eyes of the aggregated zooids are irregular and degenerate. Traustedtia, new subgenus. This subgenus includes the most highly modified members of the family. It has been studied by Quoy and Gaimard (1826-1834), Traustedt (1893), Apstein (1894, b, 1904, 1906, b) and Dober (1912). Ihle (1911) discusses briefly the nomenclature. In Ap- stein's several accounts two species seem to be confused. Our specimen aids little in clearing up this confusion. All the material previously known should be restudied. The Traustedtias are rare forms and new material is not likely often to be found or to be abundant when found. Assuming the gen- eral accuracy of the descrip- tions that have been pub- lished, I am tentatively recognizing two species—multitentaculata and radiata. We have had only a single specimen of the solitary form of the species multitentaculata. This will first be described. It is different enough from Apstein's specimen to be placed in a distinct subspecies. The species multitentaculata may be taken as the type of the subgenus since it was the first described and its aggregated form is known. TRAUSTEDTIA MULTITENTACULATA, new subspecies B1CRISTATA, solitary form. Plate 14. The United States National Museum collections contain a single example of the solitary form of this very rare salpa. Cat. No. 6430 (Type) ; (solitary form), Albatross station D. 2585, off Marthas Vineyard; September 19, 1885; 542 fathoms; surface tem- perature, 73° F. It was collected at the surface of the ocean, along with very many solitary and aggregated zooids of Thalia democratica, among which we found it, in a large bottle containing several thou-
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