TUNICA TA. 
Moll. 105 
Bathyoncus, g. n. Body ovate, sessile, slightly attached j apertures 
inconspicuous. Test membranous and transparent. Branchial sac with 
several slight folds on each side, and a larger one on the left side near 
the dorsal edge; meshes square, no stigmata. Dorsal lamina a plain 
membrane. Tentacles simple. Alimentary caual on the left side. A 
single elongated genital gland on each side. The chief peculiarity is in 
the structure of the branchial sac. B. mirabilis, sp. n., between Cape 
of Good Hope and Kerguelen Island, 1600 fath. ; Herdman, l. c. 
pp. 165-167, pi. xxiv. figs. 8-12. 
Polycarpa pomacea (Sav.) ? and comata (Aid.) Sorby & Herdman, 
J. L. S. xvi. pp. 531 & 532, the latter pi. x. fig. 6, Southern coasts of 
England. 
Polycarpa viridis (Quoy & G., Ascidia ), Port Jackson; P. minuta , 
molguloides , quadrata, pilella, rigida, long is iphonica, irregularis, sulcata , 
pedata , and radicata (Herdm., 1881), fully described by Herdman, l. c. 
pp. 167-182, pis. xxi.-xxiii. and xxiv. figs. 1-5. 
Polycarpa spongiabilis , Westludies and Brazil, and obtccta, St. Thomas, 
spp. nn. ; Traustedt, l. c. pp. 125-127, pis. v. figs. 7-9, vi. fig. 15. 
Boltenia elcgans (Ilerdm.), Nova Scotia, legumcn (Less.), Straits of 
Magellan and Falkland Islands, and pachydermalina (Herdm.), New 
Zealand ; Herdman, l. c. pp. 86-90, pi. vii. 
Culeolus , g. n., near Boltenia. Body pedunculated, tentacles compound 
branchial aperture triangular, atrial aperture bilabiate. Terminal twigs 
of the blood-vessels opening into a well-developed system of globular 
cavities, separated by extremely thin walls from the external medium, 
and in direct connection with the delicate hollow papilla) projecting from 
the outer surface of the tost. 6 species, all from over 1000 to 2000 fath., 
in various parts of the world. Herdman, P. K. Soc. xxxiii. pp. 104-106, 
with woodcut. 
Culeolus murrayi, wyville-thomsoni , recumbens , perlucidus , moseleyi 
(Herdm.), and perlatus (Sulim, MS.), = suhmi (Herdm., 1881 ; see Zool. 
Bee. xviii. Moll. p. 99), fully described and compared ; Herdman, 
Tunicata of the ‘ Challenger,’ pp. 90-126, pis. x.-xii. and xiii. figs. 1-6. 
Fungulus, g. n. Body globular, borne on a short thick peduncle 
attached to the anterior end ; branchial aperture triangular, atrial 
aperture bilabiate. Test cartilaginous, but very thin, not modified on 
the peduncle. Branchial sac with several slight folds, meshes square, no 
stigmata. Dorsal lamina a plain membrane. Tentacles compound. A 
single genital gland on each side. Internal structure therefore nearer to 
Boltenia than to Cynthia. F. cinereus , sp. n., between Cape of Good 
Hope and Kerguelen Island, 1600 fath. Herdman, l, c. pp. 127-130* 
pi. xiii. figs. 7-10. 
Ascidiims (Phallusiid^:). 
Traustedt characterizes the family Phallusiidce by 6 or more lobes in 
the oral and cloacal orifices, the nou-branched tentacles, and the non- 
plaited branchial sac, and gives the chief characters of the 6 genera con- 
tained in it ; Chelyosoma, Corella, Rhodosoma , Ciona , Phallusia , and 
