ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 299 
Abundant on Laminarie at Hillswick. It comes near to Seutillidium, 
Claus, differing chiefly in the first feet having the inner branch with 
second and third joints very short, and in the structure of the outer 
branch ; and in the last feet consisting of only a single branch. ; 
Cetochilus septentrionalis, Goodsir= OC. Helgolanilicus, Claus, Die frei lebenden 
Copepoden, p. 171, pl. xxvi. figs. 2-7. Abundant in the surface-net in 
the open sea. 
Calanus Clausii, G. 8. Brady, Nat. Hist. Trans. Northumberland and Durham, 
vol. i. (1865) p. 33, pl. i. figs. 1-11, 13. In surface-net off Out Skerries, 
1861, and Balta Sound, 1867. 
Dias longiremis, Lilljeborg, De Crust. ex ord. tribus Clad. Ost. et Cop. (1853) 
p- 181, pl. xxiv. figs. 1-13 ; Claus, Die frei lebenden Copepoden, p. 193, 
pl. xxxili, figs. 6-14; G. 8. Brady, Nat. Hist. Trans. Northumb. and 
Durham, vol. i. (1865) p. 35, pl. i. fig. 14, and pl. ii. figs. 11-18, = Calanus 
ELucheta, Lubbock, Ann. Nat. Hist. 2nd ser. vol. xx, (1857) p. 401, pl. x. 
figs. 1-6. Abundant in the towing-net. 
Temora Finmerchica (Gunner). Towing-net, common. 
Ichthyophorba hamata, Lilljeborg, De Crust. Clad. Ostrae. et Copep. p. 185, 
pl. xxi. figs. 1-5, 7-9, and pl. xxii. figs. 9-12, =Ichthyophorba angustata, 
Claus, 1. c. p. 199, pl. xxxv. figs. 2, 10-12, =I. hamata, G. 8. Brady, Nat. 
Hist. Trans. Northumb. and Durham, vol. i. (1865) p. 89, pl. i. fig. 17, 
and pl. iv. figs. 7-10, =Diaptomus Bateanus, Lubbock, Ann. Nat. Hist. 
2nd ser. vol. xx. (1857) p. 404, pl. xi. figs, 1-3. In towing-net, 
frequent. ‘ 
denticornis, Claus, l. c. p. 199, pl. xxxv. figs. 1, 3-9; G. 8. Brady, Nat. 
Hist. Trans. Northumb. and Durham, vol. i. (1865) p. 40, pl. iv. figs. 1-6. 
Towing-net, open sea, occasional. 
Diaptomus Westwoodii, Lubbock, Trans. Linn, Soc. vol. xxiv. p. 208, pl. xxxi. 
figs. 1-6. In lakes near Lerwick, and in Unst. 
Anomalocera Paiersonii, Templeton. Common in the surface-net. 
Pontellina brevicornis, Lubbock, Ann. Nat. Hist. 2nd ser. vol. xx. (1857) 
p. 407, pl. xi. figs. 4-8. Taken once abundantly in the towing-net be- 
tween the Fair Isle and Shetland in 1863. 
Notodelphys ascidicola, Allmann ; Baird, Brit. Entom. p. 238, pl. xxx. figs. 7, 
8, =. Allmanni, Thorell, Crust. som lefva a arter af sligtet Ascidia, 
p. 34, pls. i. and ii. fig. 1. 
From the branchial sac and water-passages of Ascidia venosa. The 
specimens of this and all the following species. of Crusitacea parasitic in 
Ascidians have been kindly forwarded to me by Mr. Albany Hancock, 
who found them during his investigations into the ana tomy and physio- 
logy of the Tunicata, when dissecting Shetland Asciclians, with which 
Mr. Jeffreys and myself had supplied him. All the seven following 
species are new to our fauna. 
ceerulea, Thoreli, Crust. som lefva a arter af sligtet Asci dia, p. 37, pls. iii. 
and iv. fig. 4. 
From the branchial sac and water-passages of Ascidia parallelogramma 
and A. venosa. 
—— prasina, Thorell, Crust. som lefva a arter af sliigtet As¢ idia, p. 41, pl. v. 
fig. 7. From the water-passages and branchial sac of 2 1scidia mentula. 
Doropygus auritus, Thorell, Crust. som lefya a arter af slii¢ tet Ascid. p. 50, 
pls. vii. & viii. fig. 10. From the branchial sac and w ater-parisages of 
Ascidia mentula. 
Botachus cylindratus, Thorell, Crust. som lefya a arter af sligte’t Ascidia, 
1 2 
