SERTULARIAD^E : ANTENNULARIA. 85 



Hyndman, when dredging on two occasions near Sana Island (Scot- 

 land), brought it up from about 40 fathoms' water, in some quantity 

 and remarkably fine. Some of the specimens are greatly branched, 

 spreading out to six inches, and one example has attained the height 

 of ten inches and a half. The pinnae are alternate in all the speci- 

 mens from the above stations." W. Thompson. Common on the 

 shores near Liverpool, H. Johnson. Whiteburn, Northumberland, 

 Miss M. Dale. Scarborough, W. Bean. Rare in Cornwall ; fine in 

 Devon ; and not common in Norfolk. Charles W. Peach. 



Polypidom about four inches high, simple or irregularly divided ; 

 of a pale horn colour and texture, the lower part of the rachis filiform 

 and wrinkled like that of Tubularia larynx, compressed upwards and 

 finely wrinkled when dry, divided by joints not regularly equi- 

 distant, often naked on the lower half, pinnated above and celli- 

 ferous ; pinnae simple, usually about an inch in length, patent, 

 rather close-set, not exactly opposite nor yet properly alternate, ori- 

 ginating in a narrow base. Cells in a single series along each side, 

 semi-alternate, ovato-tubular, short, with a round plain aperture. 

 Vesicles issuing from both sides of the pinnae, most numerously 

 from the upper, subpedicellate, elliptical, smooth, the orifice con- 

 tracted and even. 



The synonymes of this species are somewhat confused. Pallas 

 affirms, correctly in my opinion, that the Sea-spleenwort of Ellis is 

 not the Sertularia Lichenastrum of Linnaeus, as is generally as- 

 serted ; and he has described a different species, considered by him 

 as identical with the Linnaean. This is the species represented by 

 Esper, Pflanz. Sert. tab. 35, fig. 1-3. The figure of Ellis is quoted by 

 Pallas as an admirable representation of his own S. articulata ; but 

 in the description of this the branches or pinnae are said to be 

 opposite, whereas in Ellis's figure, and in our own, although less 

 decidedly, they are regularly alternate. Ellis notices under his 

 S. Lonchitis a foreign variety with opposite cells and pinnae, having 

 " the joints both on the stem and branches much closer together ;" 

 and it will probably be found that this constitutes a distinct species, 

 hitherto confounded with others nearly allied. 



8. ANTENNULARIA,* Lamarck. 



CHARACTER. Polypidom plaint -like, horny, simple or 

 branched irregularly, the shoots fistular, jointed, clothed with 



* From Antennula, the diminutive of antenna, a term applied to the feelers of 

 insects. 



