CATALOGUE OF TUNICATA. 27 



Cynthia, Savigny (1816). 



This genus is represented by seven species, six of which are new to 

 science. 



Cynthia praeputialis, Heller, PL Cyn. VII., figs. 13. 



Of this curious species four specimens, of somewhat different forms, 

 exist in the collection from Port Jackson. I give reduced outline 

 figures of three of them, to show the variation in proportions. The 

 characteristic anterior end is, however, the same in all ; all have the 

 ring-like pad or fold of test surrounding the two apertures. In one case 

 (fig. 3) I have cut away part of the test to show the relation of parts in a 

 section. This figure also shows the solid posterior part of the test. In 

 another specimen (fig. 1) more than two-thirds of the body is solid test. 



The sizes of the specimens are as follows : 



A. length 5 cm., breadth 8 cm. at base, thickness 5 cm. 



B. 25 ,, ,, 



,, (test removed) ,, 7 - 5 ,, ,, 



O. ,, 11 ,, !1 



D. ,, 8 ,, ,,5 ,, ,, 3 - 5 ,, 



Shapes like B and C (figs. 1 and 3) agree perfectly with Heller's 

 excellent figures and description,* but A (fig. 2), with no approach to a 

 stalk or posterior thickening of the test, is quite an exceptional form ; it 

 is probably a younger specimen. Our largest specimen is more than 

 twice the size of the largest previously recorded. 



In internal structure our specimens agree with the account given by 

 von Draschef in 1884. The dorsal tubercle is certainly a double cone, 

 as shown by von Drasche, and not the horse-shoe-shaped form referred 

 to by Heller. I am informed that the native name for this species in 

 Australia is " Cunjeboy," and that the natives use it for bait. 



Cynthia molguloides, n. sp., PI. Cyn VII., figs. 410. 

 External appearance. Shape globular, with a large dorsal projection 

 bearing the atrial aperture. No lateral flattening, probably not attached. 

 Branchial aperture median, anterior, on a long slender siphon ; atrial 



Sitzb. Akad. Wiss. Wien. IM. LXXVII., \<. I'-', 1878. 



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t Denkscliv. Akad. Wi.ss. AVicu. lid. XLVIII., p. 074. 



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