Canon A. M. Nonnan on British Isopoda. 447 



This would seem to be a southern species. In my collec- 

 tion are co-types from Torbay (-Sfe^Jj'n^), specimens collected 

 at Exmouth [C. Parker), and others taken by myself at 

 Ilfracombe, Plymouth, and Naples. 



Genus 3. Astacilla, Cordiner, 1795. 

 = Leacia, Johnston, 1825. 



1. Astacilla longicornis (Sowerby). 



1867. Arcturus longicornis, Bate «& Westwood, I. c. vol. ii. p. 3Go, 2- 

 1867. Arcturiis gracilis (Goodsir), Bate & Westwood, /. c. vol. ii. 



p. 373. d. 

 1897. Astacilla longicornis, G. 0. Sars, /. c. p. 88, pi. xxxvi. 



Inhabiting all our coasts, Shetland, the Minch, Forth of 

 Clyde, Firth of Forth, Northumberland coast, South Devon, 

 Guernsey, Valentia, Ireland ; also Trondhjem Fiord and 

 Tromso, Norway : all in Mus. Nor. 



2. Astacilla intermedia (H. Goodsir). 



1841. Leachia intermedia, H. D. S. Goodsir, Edinb. New Phil. Jo urn. 



Tol. xxxi. p. 309, pi. vi. figs. 1-3. 

 1867. Arctuius intermedins, Bate & Westwood, I. c. vol. ii. p. 371. 

 1869. Arcturus affinis, G. O. Sars, " Xye Dybvandscrustaceer fi."a 



Lofoten," Christ. Viden. Selsk. Forhandl. p. 1G3. 

 1897. Astacilla affinis, G. 0. Sars, /. c. p. 90, pi. xsxvii. fig. 2. 



I 



i'hicli 

 lat 



which was named by H. Goodsir. That autlior describes 

 and figures the last joint of the antennte "globose'"' or, 

 according to the figure, claviform ; this appearance may have 

 been caused by the olfactory filaments clinging to the joints 

 and appearing as part of it. 



Examples in my collection are from the following sources: — 

 Firtli of Forth, i. e. Goodsii's locality for his species [Dr. 

 Henderson) ; Durham coast {xi. M. jS\) ; off S.W. Ireland, 

 100-200 fathoms (' Porcupine,' 18G9) ; off Fair Island, 

 between Orkney and Shetland (^Dr. Thos. Scott) ; Norway 

 (co-typesof -4. rtj^«zs from G. O. Sars); Tromso (Schneider). 



3. Astacilla Deshayesii (Lucas). 



1849. Arcturus Deshayesii, Lucas, Anim. Artie, de I'AlgiJrie, p. 59, 

 pi. V. fig. 7. 



1874. Arcturus gracilis, Stebbing (nee Goodsir), " Sessile-eyed Crus- 

 tacea of Devon," Trans. Devon. Assoc. Advanc. Science, p. 8, figs. 2-4 

 (separate copy). 



1878. Arcturtts /infrtr/s, Stebbing, "Notes on Sessile- eyed Crustacea," 

 Ann. & Mag. Nat. Hist. ser. 5, vol. i. p. 30. 



