ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 299 



Abundant on Laminarise at Hillswick. It comes near to Scutillidium, 

 Glaus, 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= C. Helgolandicus, Glaus, Die frei lebenden 

 Copepoden, p. 171, pi. xxvi. figs. 2-7. Abundant in the surface-net in 

 the open sea. 



Calanus Clausii, G. S. Brady, Nat. Hist. Trans. Northumberland and Durham, 

 vol. i. (1865) p. 33, pi. 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, pi. xxiv. figs. 1-13 ; Glaus, Die frei lebenden Copepoden, p. 193, 

 pi. xxxiii. figs. 6-14 ; G. S. Brady, Nat. Hist. Trans. Northumb. and 

 Durham, vol. i. (1865) p. 35, pi. i. fig. 14, and pi. ii. figs. 11-18, = Calanus 

 Eudiceta, Lubbock, Ann. Nat. Hist. 2nd ser. vol. xx. (1857) p. 401, pi. x. 

 figs. 1-6. Abundant in the towing-net. 



Temora Finmarchica (Gunner). Towing-net, common. 



Ichthyophorba hamata, Lilljeborg, De Crust. Clad. Ostrac. et Copep. p. 185, 

 pi. xxi. figs. 1-5, 7-9, and pi. xxii. figs. 9-12, =IcWiyophorba angustata, 

 Glaus, I. c. p. 199, pi. xxxv. figs. 2, 10-12, = J. hamaia, G. S. Brady, Nat. 

 Hist. Trans. Northumb. and Durham, vol. i. (1865) p. 39, pi. i. fig. 17, 

 and pi. iv. figs. 7-10, =Diaptomus JBateanus, Lubbock, Ann. Nat. Hist. 

 2nd ser. vol. xx. (1857) p. 404, pi. xi. figs. 1-3. In towing-net, 

 frequent. 



denticornis, Glaus, 1. c. p. 199, pi. xxxv. figs. 1, 3-9 ; G. S. Brady, Nat. 



Hist. Trans. Northumb. and Durham, vol. i. (1865) p. 40, pi. iv. figs. 1-6. 

 Towing-net, open sea, occasional. 



Diaptomus Westwoodii, Lubbock, Trans. Linn. Soc. vol. xxiv. p. 203, pi. xxxi. 

 figs. 1-6. In lakes near Lerwick, and in Unst. 



Anomalocera Patersonii, Templeton. Common in the surface-net. 



Pontellina brevicornis, Lubbock, Ann. Nat. Hist. 2nd ser. vol. xx. (1857) 

 p. 407, pi. 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, pi. xxx. figs. 7, 

 8, =sN. Allmanni, Thorell, Crust, som lefva a arter af slagtet Ascidia, 

 p. 34, pis. 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 Crustacea parasitic in 

 Ascidians have been kindly forwarded to me by Mr. Albany Hancock, 

 who found them during his investigations into the anatomy and physio- 

 logy of the Tunicata, when dissecting Shetland Ascidians, with which 

 Mr. Jeffreys and myself had supplied him. All the seven following 

 species are new to our fauna. 



ccemlea, Thorell, Crust, som lefva a arter af slagtet Ascidia, p. 37, pis. iii. 



and iv. fig. 4. 



From the branchial sac and water-passages of Ascidia parallelogmmma 

 and A. venosa. 



prasina, Thorell, Crust, som lefva a arter af slagtet Ascidia, p. 41, pi. v. 



fig. 7. From the water-passages and branchial sac of Ascidia mentula. 



Doropygus auritus, Thorell, Crust, som lefva a arter af slagtet Ascid. p. 50, 

 pis. vii. & viii. fig. 10. From the branchial sac and water-passages of 

 Ascidia mentula. 



BotacJms cytindratus, Thorell, Crust, som lefva a arter af slagtet Ascidia, 



y 2 



