102 AUSTRALIAX FRESHWATER H^AGELLATES, 



Salpixgoeca AMPHORiDirM Clark. 



If I say that I do not know whether I have ever observed the type of 

 this species, it is because Clark's original figures (Ann. Mag. Nat. Hist., Sen iv., 

 vol. i., 1868, p. 2U3) are difficult of access, the figui^es given by various authors 

 all differ among themselves and. though typical forms are distinct enough, it is 

 not always easy to say where .S'. amphoridium ends and 6'. ampuUacea begins. 



Lately, however, I have obtained good pencil sketches of Clark's tj'pe figures. 

 He gives two, which are not in the least aUke. The second has never, to my 

 knowledge, been observed or figured since, and as it is far the most common 

 form of Salpiiigoeca in this country, I have adopted it as var. amtralica 

 (infra). The other is nearly, but not quite identical with Kent's figures (In- 

 fusoria, PI. v., figs. 3, 4, and 7 only, especially fig. 4) — this, therefore, must be 

 considered as the type. It has an almost exactly globose body, rounded below, 

 somewhat produced and ovate above, but vei-y little uanowed or constricted in 

 the throat, the .sides diverging upwards and outwards straight to the wide mouth, 

 rim not everted. There is no distinct tubular neck. Kent's figures are all too 

 narrowly constric-ted and some verge on .S'. ampuUacea. 



Var. ACSTRALICA mihi. (PI. i., fig. 6). 



Cellulae minutae, sessiles; infeme rotnndatae, supeme ovatae, baud vel 

 levis-sime constrictae, lateribus ad os convergentibus, ore non everto. collo nuDo 

 vel baud distincto. 



Cell. long. 8—14. lat. 4— (i. lat. oits 1—2^ 



Auburn; Guildford; Casino (189); Lismore (254, 260). 



Our commonest form; found sessile on Spirogyra, Hydrodictyon, Oedogo- 

 nium, more rarely on Cyclops (Entomostraca). The cells are ovate, rounded 

 below, narrowed above, sides converging to the narrow mouth, ov.'v very slightly 

 con.stricted, if at all, therefore with no formation of throat or mck except the 

 very least straightening of the sides below the mouth, rim not turned out. 

 Senn's figure of S. amphoridium, Flagellata. p. 128, fig. 85a (after i'rance), has 

 the same shape of opening as var. au.itralica, but below is very Strongly in- 

 flated, much more so even than in Clark's tJTJe. It might stand as var. Francei. 

 Butschli's form with flat base, figured by Kent (I.e., PI. v., fig. 33) should 

 rather, on a<-count of the distinct neck and everted rim, be considered a variation 

 of .S'. timpullacea. 



Salpixgoeca steixii Kent. (PI. i.. fig. 7). 



Syn. .s. amphoridium Stein (noii Clark), I.e., T. si. f. 1 — 5. This form 

 might well have been arranged as a variation of S. amphoridium. The loriea has 

 the same characteristic wide mouth and throat but no neck. The l)ody. liowever, 

 in.stead of being globular, is drop-shaped with a minute protuberance beneath, 

 acting as a pe<luncle. 



Cell. long. 21 ; lat. corp. 7, constrict. 2i, oris 5yM.. 



Fairfield (112). Out of weeds in a creek pool. 



SALPiKfK)ECA OBLONGA Stein. (PI. i.. figs. 8, 9). 



Cell. long. 11 — 16; lat. 4J — 6, lat. oris 3J; stip. long. 4 — 5^. 

 Guildford (77, 88); Lismore (260). 



'"/. Stein, I.e., T. X., fig. iv., 4. Zooid not observed. Stein's figure works 

 out at long. Corp. 21, lat. 7J; stip. long. 9/i. Very rare here and position some- 



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