TUNICATA. 699 
in the same individual, but in two succeeding generations. The 
parent animal, for instance, always resembles her grand-daughter 
and her sister, not her daughter, which, again, resembles the pre- 
ceding generation. This conclusion seemed to most succeeding 
observers so strange, that they thought it could not be adopted ; 
Meven supposed that these animals are always born as single 
individuals, and only become united subsequently. Nevertheless, 
Escuricut discovered within single individuals embryos connected 
together in a wreath, so that hereby CHamisso’s conclusion was 
established, that chains of connected Salpw were formed even 
within the parent. STEENSTRUP brought this peculiarity in the 
propagation of the Salpe into unison with other phenomena in the . 
animal kingdom, in his interesting work, Om Fortplanining og 
Udvikling gjenem Cenerationsrackker, (see above, p. 70), and the 
meritorious Norwegian observer Sars, completely confirmed it 
(Faun. littor. N orvegia). With it too the numerous observations 
lately communicated by Kron, are in accordance. The solitary 
Salpw are sexless, and are propagated by internal germs or buds 
connected in strings. Hence the associated form appears to be 
the most perfect, that in which organs of propagation are developed, 
(and organs of impregnation also, testes) ; each individual of the 
associated Salpaw produces only a single young one. 
Sp. Salpa maxima Fors. Jcon. Tab. xxxv. fig. A, MILNE Epwarps, Cov. 
R. Ani., éd. ill., Moll. Pl. 120, 121, fig. 1 (here belongs, according to 
Kroun, Salpa Forskalii LESSON and the solitary form Salpa africana 
Forsk.) ;—S. runcinata CHAMISSO 1. 1. fig. v. Salpa fusiformis Cuv. Mém. 
s. 1. Biphores, fig. 10, Sars 1. 1. Tab. vit. figs. 44, 45, Tab. 1x. ;—Salpa 
pinnata Forsx., S. cristata Cuv., Forsk. Icon. Tab. cit. fig. B, Cuv. Mém. 
figs. I—3, 11, CHAMISSO 1. 1. fig. 1 (associated form arranged in a circle) &e. 
Note.—The species of Salpe are not yet sufficiently known, of many at 
least, the synonymy is very difficult, full of doubt. Kroun 1. ]. has endea- 
youred to unravel the species from the Mediterranean. To the authors 
already cited, the French voyagers Quoy and GarmarD Voyage de UV Astro- 
labe, Zoologie, Tom. It. 1835, pp. 559—598, Pl. 86—8g, are to be added. 
Anchinia Escuscn., RaTHKE. Small Salpe aggregated in a single row 
to a gelatinous filament. See Wrncmann’s Archiv, 1835, I. p. 85. 
Doliolum Quoy and Gar. [Body cask-shaped. Branchiz in two 
bands with perpendicular bars, one on the dorsal (hemat) the other 
on the ventral (newral) surface of the respiratory cavity, converging 
and passing into each other posteriorly. | 
Doliolum Orto differs from that bearing the same name: whether it be 
a Beroé or a mutilated Salpa, I know not. Comp. Nov. Act. Acad. Leop. 
Car. xt. Tab. 42, fig. 4. 
