ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 805 
Carbasea papyrea (Pallas). From fishing-boats, Middle Haaf. 
Gemellaria loriculata (Linn.). Occasionally met with. 
Altea sica (Couch). Hippothoa sica, Couch, Corn. Fauna, iii. p. 102, pl. xix. 
fig. 8, = Atea recta, Hincks, Cat. Zoophytes Devon and Cornwall, p. 35, 
pl. vii. fig. 3. 
40-80 fathoms, on shells and stones, frequent. 
Hippothoa catenularia (Jameson). Common on stones in 40-170 fathoms. 
divaricata, Lamx. 40-90 fathoms on shells, more rarely on stones. 
expansa, Norman, Quart. Journ. Mic. Sci. vol. viii. (1868) p. 216, 
pl. vi. figs. 1, 2. The type, and only known specimen, dredged in 100 
fathoms off Unst in 1864. 
Membranipora membranacea (Linn.). 
pilosa (Linn.). 
coriacea (Esper.). On underside of stones between tide-marks. 
—— lineata (Linn.), Alder, Cat. Zooph. Northumberland and Durham, p. 53, 
pl. vil. fig. 1. On roots of Fuci and Laminarie. 
spinifera (Johnston), Alder, Cat. Zooph. Northumberland and Durham, 
p. 53, pl. vill. fig. 2. On stones, tide-marks. 
— Plemingii, Busk. 15-100 fathoms. 
craticula, Alder, Catal. Zooph. Northumberland and Durham, p. 54, 
pl. vii. fig. 8. Ona stone from shallow water, Hillswick, and roots of 
Laminari, Bressay Sound. 
— Dumerilla (Aydouin)=FPlustra Dumerillii, Audouin, Savigny, Hist. 
lEgypt, pl. x. fig. 12, = Membranipora Pouilletii, Alder, Cat. Zooph. Nor- 
thumberland and Durham, p.56,pl. viii. fig.5; Quart. Journ. Mic. Sci. N.S. 
vol. v. (1857) p. 248 (but not Plustra Pouilletii, Audouin, Savigny Hist. 
lEgypt, pl. ix. fig. 12). Occasional on Cellepora cervicornis and shells. 
A curious mistake has been made by Alder and Busk respecting this 
species, which is clearly that represented by Savigny’s pl. x. fig. 12, 
viz. Flustra Dumerillii, instead of which the name of pl. ix. fig. 12 has 
been quoted Flustra Pouilletii, which bears not the slightest resem- 
blance to the present form, being a Lepralia allied to L. innominata. 
- wucornis (Fleming), Alder, Cat. Zooph. Northumberland and Durham, 
». 56, pl. vill. fig. 6.“ Tide-marks, Balta Sound” (Peach, 1864). 
ornigera, Busk, Quart. Journ. Mic. Sci. N.S. vol. viii. 1860, p. 124, 
». xxv. fig. 2. A very interesting and very rare species ; 100 fathoms, 
uter Haaf. 
—— imbellis, Hincks, Quart. Journ. Mic. Sci. N.S. vol. viii. (1860) p. 275, 
pl. xxx. fig. 1. Rare, 40-50 fathoms, 5-7 miles east of Balta. 
—— rhynchota, Busk, Quart. Journ. Mic. Sci. N.S. vol. viii. (1860) p. 125, 
pl. xxv. fig. 1 (called W. minax in text); Crag Polyzoa, p. 33, pl. iii. 
fig. 7. In 40-170 fathoms, common; the most abundant species in 
deep water, it encircles the dead shells of Dentalium and Ditrupa with 
its polyzoary. 
fiosselui (Audouin). On stones, Outer Haaf, 80-140 fathoms. 
sacculata, Norman, Ann. Nat. Hist. 3rd ser. vol. xiii. (1864) p. 88, 
pl. xi. fig. 3. Common, 40-170 fathoms, on stones and shells, 
—- vulnerata, Busk, Quart. Journ. Mic. Science, N.S. vol. viii. (1860) 
p- 124, pl. xxv. fig. 3. In 80-110 fathoms. This very distinct little 
species has a very peculiar habit; it is never found on any but the 
smallest stones. I do not remember to haye ever seen it on a pebble 
larger than the little finger-nail; more generally it selects those that 
are not more than a fourth of that size. 
