ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 301 
ceding segments, terminating in four long plumose lacinie and two small 
spines ; inner margin of laminee ciliated. 
Kindly procured for me by Dr. Saxby, and found on a Skate. Itis very 
distinct from all the described species known to me. I have named it 
after my friend Dr. Liitken, of Copenhagen, to whom, in conjunction 
with Prof. Steenstrup, we are indebted for one of the best monographs 
on the parasitic Copepoda. 
Echthrogaleus coleoptratus (Guérin) = Dinematura coleoptrata, Guérin, Icon. 
Reg. Anim. Crust. pl. xxxy. fig. 6, =Dinemoura alata, Baird, Brit. 
Entom. p. 285, pl. xxxiii. figs. 6,7, =Zchthrogaleus coleoptratus, Steen- 
strup & Liitken, Havs Snyltekrebs og Lerneer (1861), p. 40, pl. viii. 
fig. 15. On a Shark. 
Dinematura producta (Miller) =Dinemoura Lamne, Baird, Brit. Entom. 
p- 286, pl. xxxiii. fig. 8, =Dinematura producta, Steenstrup & Liitken, 
Hays Snyltekrebs og Lerneer, p. 34, pl. vii. fig. 13. With the last. 
andarus bicolor, Leach. On Dogfish. 
Chondracanthus Lophii, Johnston=Lernertoma Lophii, Baird. In the pouches 
of the Angler, Lophius piscatorius. 
Lrachiella rostrata, Kroyer, Naturhistorisk Tidsskrift, 1 Bd. (1837) p. 207, 
pl. il. fig. 1, and Naturhist. Tidss. Tredie Rekke, vol. ii. (1864) p. 364, 
pl. xvii. fig. 8. On the Holibut, Hippoglossus vulgaris. New to Britain. 
Anchorella uncinata (Miller). Common on various Gadide and other fish. 
Order THORACICA. 
Balanus porcatus, Da Costa. Common in deep water; but I have never seen 
large specimens in the Shetland seas. 
Hameri (Ascanius). 40-50 fathoms ; scarce. 
balanoides (Linn.). Common. 
Verruca Strémia (Miller). Common on shells and stones in deep water. 
Scalpellum vulgare, Leach. Down to 60 fathoms, St. Magnus Bay, Whalsey 
Skerries Haaf; off Balta &c. 
Alvippe lampas, A. Hancock, Ann. & Mag. Nat. Hist. 2nd ser. vol. iv. (1849) 
p- 305, pls. viii. ix. In the shell of Fusus antiquus, dredged in 40-50 
fathoms, 5-8 miles east of Balta. 
Order PYCNOGONOIDEA. 
Pyenogonun littorale, Stvém. Very common under stones, tide-marks; and 
also in deep water to 50 fathoms. 
Phoxichilidium femoratum (Rathke)=Phowichilidium coccineum, Johnston. 
Common, tide-marks. 
Nymphon giganteum, Johnston. Occasional, deep water. 
—— Strom, Kroyer, Naturhist. Tidssk. Andet Reekke (1844), vol.i. p. 111; 
Gaimard, Voyages en Scandinavie &c. pl. xxxy. fig. 38. A single speci- 
men, the only known British example, dredged in 1861 in 80 fathoms, 
40 miles cast of Whalsey Skerries. 
—— hirtum, O. Fab. One mile north of Whalsey Skerries Lighthouse, in 
40-50 fathoms. 
—— mixtum, Kroyer, St. Magnus Bay, 1867. 
Clas ARACHNIDA. 
Order ACARINA. 
Halacarus ctenopus, Gosse, Ann, Nat, Hist. 2nd ser. vol. xvi, (1855) p. 28, 
