ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 305 



Cdrbasea papyrea (Pallas). From fishing-boats, Middle ITaaf. 



Oemellaria loriculata (Linn.). Occasionally met with. 



JEtea ska (Couch). Hippoihoa sica, Couch, Corn. Fauna, iii. p. 102, pi. xix. 

 fig. 8, JStea recta, Hincks, Cat. Zoophytes Devon and Cornwall, p. 35, 

 pi. vii. fig. 3. 



40-80 fathoms, on shells and stones, frequent. 



JfippotJioa 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, 



pi. 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 arid Durham, p. 53, 



pi. viii. fig. 1. On roots of Fuci and Laminariac. 



spinifera (Johnston), Alder, Cat. Zooph. Northumberland and Durham, 



p. 53, pi. viii. fig. 2. On stones, tide-marks. 



Fleminyii, Busk. 15-100 fathoms. 



craticula, Alder, Catal. Zooph. Northumberland and Durham, p. 54, 



pi. viii. fig. 3. On a stone from shallow water, Hillswick, and roots of 

 Laminariae, Bressay Sound. 



Dumerittii ( Audouin) = ^tera Dumerillii, Audouin, Savigny, Hist. 



1'Egypt, pi. x. fig. 12, = Membranipora Pouilletii, Alder, Cat. Zooph. Nor- 

 thumberland and Durham, p. 50, pi. viii. fig. 5 ; Quart. Journ. Mic. Sci. N. S. 

 vol. v. (1857) p. 248 (but not Flustra Pouilletii, Audouin, Savigny Hist. 

 1'Egypt, pi. 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 pi. x. fig. 12, 

 viz. Flustra Dumerittii, instead of which the name of pi. 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. innominate. 



unicornis (Fleming), Alder, Cat. Zooph. Northumberland and Durham, 



p. 56, pi. viii. fig. 6. Tide-marks, Balta Sound" (Peach, 1864). 



cornigera, Busk, Quart. Journ. Mic. Sci. N. S. vol. viii. 1860, p. 124, 



pi. xxv. fig. 2. A very interesting and very rare species ; 100 fathoms, 

 Outer Haaf. 



- imbellis, Hincks, Quart. Journ. Mic. Sci. N. S. vol. viii. (1860) p. 275, 

 pi. xxx. fig. 1. Hare, 40-50 fathoms, 5-7 miles east of Balta. 



rliynchota, Busk, Quart. Journ. Mic. Sci. N. S. vol. viii. (1860) p. 125, 



pi. xxv. fig. 1 (called M. minax in text) ; Crag Polyzoa, p. 33, pi. iii. 

 fig. 7. In 40-170 fathoms, common; the most abundant species in 

 deep water, it encircles the dead shells of Dentalium and Ditrwpa with 

 its polyzoary. 



Itosselii (Audouin). On stones, Outer Haaf, 80-140 fathoms. 



sacculata, Norman, Ann. Nat. Hist. 3rd ser. vol. xiii. (1864) p. 88, 



pi. xi. fig. 3. Common, 40-170 fathoms, on stones and shells. 



vulnerata, Busk, Quart. Journ. Mic. Science, N. S. vol. viii. (1860) 



p. 124, pi. 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 have 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. 



