CATALOGUE OP TUNICATA. 35 



Meshes square to oblong in shape, with 4 to 7 stigmata each Meshes 

 often divided by a narrow horizontal membrane. 



Dorsal languets numerous, short, tentacular in shape. 



Tentacles very large and bushy. There are 16, 8 larger and 8 smaller, 

 but all of them considerably branched. 



Dorsal tubercle forming a double spiral cone. 



Intestine forming a wide open loop. Gonads are large lobed masses 

 on each side. 



Locality. Port Jackson ; five specimens. 



This remarkable species recalls the brief description given by 

 Stimpson of his Cynthia dumosa, also from Port Jackson. All the 

 information we possess in regard to that species is as follows : 



"10. Cynthia dumosa. Globular, of a yellowish brown colour; 

 surface villous and provided with numerous stout sub-conical processes 

 of the test, which have short irregular branches. Apertures cross-shaped 

 when contracted ; the branchial more than twice the size of the anal. 

 Branchial sac with twelve very large folds, which are much broader 

 than their interspaces. Tentacula also twelve in number, including four 

 or five small ones ; biserrate, folded longitudinally, and curved so as to 

 present their pinnae towards the branchial cavity. Diameter 1 inch. 

 Found in the circumlittoral zone, on muddy bottoms. Hab. Australia, at 

 Port Jackson. " : 



The external characters given in this description agree well enough 

 with those of the present species, and taken along with the internal 

 characters given, they are sufficient to show that C. dumosa belongs to the 

 sub-family Cynthiinae. The branchial sac and tentacles differ from our 

 present species, as defined above, and so I feel bound on our present 

 evidence to consider C. crinitistellata as a distinct form new to science. 

 Its spinose condition (PI. Cyn. X., fig. 13) is very remarkable, and still 

 more curious is the minute downiness over the surface, which, when 

 magnified, is seen to be caused by closely-placed and beautifully stellate 

 papillae (PL Cyn. XI, fig. 10). 



The four remaining specimens in the collection are of .the follovviug 

 sizes : 



A. ... 5 cm. x 3 cm. x 2 cm. 



B. ... 2-5 ,, x 2 ,, x 1-5 ,, 



C. ... 3 ,, x 2 ,, x 1 



D. ... 6 x 4 x 2 



* Proc. Acad. Nat. Sci., Philadcl., July, 1855. 



