~ eg, 
ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 319 
Zoanthus incrustatus (Diiben & Koren) = Dysidea papillosa, Johnston, Brit. 
Zooph. p. 190 partly and woodcut (not pl. xvi. figs. 6, 7), = Epizo- 
- anthus papillosus, Gray, Proc. Zool. Soc. 1867, p. 237, =Zoanthus Cou- 
chit, var. diffusa, Gosse, Brit. Sea Anem. p. 298, pl. ix. fig. 10, =Zo- 
anthus Couchii (partly), Holdsworth, Ann. Nat. Hist. 3rd ser. vol. iv. 
1859, p. 153, =Mammillifera incrustata, Diiben & Koren, Ofversigt 
af K. Vet. Akad. Forh. 1844, p. 115; Sars, Reise i Lofot. og Finm. 
p. 142; and Forh. ved Skand, Naturf. Mode i Kjébenh, 1860, p. 691, 
=Zoanthus incrustatus, Sars, Bemerk. over norske Celenterater (Vi- 
denskabs Forhandl. Christ. 1860), p. 2. 
This species is well described by Sars, and is certainly, I think, 
distinct from Z. Couchii. Johnston described it as a sponge, including 
with it the form which he subsequently redescribed as an Actinozoon 
under the name Zoanthus Couchit. Both these names, therefore, cannot be 
retained, and that of Diiben and Koren must be adopted for the present 
species. It is found in immense profusion 5—8 miles east of Balta in 
40-50 fathoms, inhabited by Pagurus levis; also in St. Magnus Bay. 
anguicoma,n. sp. Ccoencecium coating sponges, on which it creeps in 
strip-like bands, from which at various intervals (generally very short) 
arise the polyps ; column 3-5 times as high as broad, slightly expanded 
above, external surface of summit with about 18 radiating corrugations. 
Tentacles in two rows, about 34, very long and extensile, more than 
equal diameter of disk when fully expanded, gradually attenuating to 
very slender points. Cuticle with sand imbedded in the surface, but not 
very firm. Colour pinkish white. 
Living on the Sponges, Phakellia ventilabrum and robusta, Normania 
crassa, Oceanapia Jeffreysii, &c., in very deep water, 110-170 fathoms, 
20-25 miles N.N.W. of Burrafirth Lighthouse. 
Certainly distinct from the last, which has the tentacles very short 
and rarely extended beyond the mouth; indeed I question if they ever 
are. I have watched the species alive, but have never seen them pro- 
truded to any extent; and Sars says of them, “ Pars protractilis poly- 
perum tentaculis munita 36-40 biserialibus, alternantibus, elongato- 
conicis, acuminatis, levibus (haud verrucosis) superioribus longitudine 
dimidiam partem diametri disci oralis equantibus, inferioribus brevio- 
ribus.” In Zoanthus anguicoma, on the contrary, they are long, slender, 
and very extensile, and a colony of the species with the polyps expanded 
is a very pretty sight. 
Sidisia Barleei, Gray, Proc. Zool. Soc, 1858, p. 532, pl. x. fig. 6, and id. 
ibid. 1867, p. 237. 
Taken abundantly in company with Zoanthus incrustatus, of which I 
was at one time inclined to consider it a variety ; but more careful ex- 
amination and dissection has convinced me that there are certain di- 
stinctions between the two besides the fact of Sidisia being a free-living, 
unattached form. Whether those distinctions are specific or seaual 
(which, I think, may be the case), a careful examination of the living 
animal must hereafter determine. 
Caryophyllea Smithii (Stokes). The variety borealis, Fleming (Brit. Anim. 
p- 509; Johnst. Brit. Zooph. p. 195), occurs in many places in extraor- 
dinary abundance on the Shetland Haaf. It ordinarily attaches itself 
to the shells of Ditrupa, but sometimes on stones, and then the base is 
generally broader, and the coral approaches more closely to the ordinary 
littoral form, Although I have traced this species over some hundred 
