REPORT ON THE TUNICATA. 53 



Alimentary Canal coiled w^ to form a small opaque mass placed posteriorly 



and veutrall}'. 

 Chain of Embryos in tlio form of an elongated baud. 



This important genus has had many synonyms, but few of them have attained to 

 any currency, and there is no doubt that Sal2')a, Forskahl, is the correct name for the 

 genus. The earlier names under which some of the forms were descriljed were Dayysa 

 (Banks and Solander, 1773) and Ilolutlmrium (Pallas, 1774). IloJotlturia was also 

 made use of by Linnteus (1758). 



Forskahl was the first to give a proper definition of the genus to which he applied 

 the name SaJpa} He recognised two groups — those forms with a nucleus and those 

 with none, and described the following species from the Mediterranean : — Salpa 

 maxima, Salpa pinnata, Salpa dcmocratica, SaJpa miicronata, Salpa punctata, 

 Salpa confcederata, Saljoa fasciata, Salpa sipho, Salpa africana, Salpa solitaria, 

 and Saljya p)olycratica. Most of these are good species^ so that the founder of the 

 genus had before him a fair number of the species now known to belong to it. 



Browne " had previously, and he also subsequently, described some Salpx from the 

 West Indies under the name of Thalia, which I place as a synonym of Cyclosalpa (see 

 below, p. 86). 



Tilesius in 1802 described, under the name I'hetys vayina, the large species which 

 is now known as Salpa costata-tilesii. 



Cuvier's important memoir on the genus (1804), besides making known many points 

 in the anatomy, and demonstrating the relationship of Thalia {Cyclosalpa) and Salpa 

 to the Ascidians, contained descriptions of the species — Salpa cristata (= Cyclosalp)a 

 'pinnata, Forsk.), Salpa tilesii, Salpa scutigeva, Salpa octojbrco, Salj^a cylindrica, and 

 Salpa fusiformis, the last four being new species. He placed the genus Salpa amongst 

 the " MoUusques acephales nus." 



Savign}' in his third memoir (1816) gives an account of the structure of Salpa, 

 and of its relations to the other Tunicata. He also illustrates by a plate the anatomy 

 of two of Cuvier's sjiecies, Salpa octofora and Salpa cylindrica, for which he forms 

 two unnecessary new genera, Fcgca and lasis. 



In the description of some surface forms obtained during the voyage of the Corvette 

 "L'Uranie," under Freycinet, CL>uoy and Gaimard in 1825'"' describe the species — 

 Salpa onaxima, Scdpct costata, Scdpm bigihhosa, Scdpa hexagona, Scdpa gihhosa, 

 Salpa longicauda, Salpa tricuspidata, Scdpcc infundihidiformis, Salp>a suhorhiculans, 

 Scdpa. informis, Scdpa rhomhoidcs, Scdpa triayignlaris, Scdpa cmarginata, and Salpa 



1 Descriptiones animalium, p. 112, ITT.J. 



- Nat. Hist, of Jamaica, London, 17o0. and also 17S5 (2nd cd.). 



" Ami. d. Sci. Nat., torn. vi. p. 28, 1825. 



