ADDENDA AND CORRIGENDA. 347 



Pago 271, Serpiila (Vermilia) conica, after specific description add 

 Plate XX. fig. 1 (operculum) ; and Page 272, after (a) Berwick Bay, 

 Dr. Johnston, add (b-d) Polperro, Cornwall, Laughrin ; (e) Coast of 

 Northumberland (tubes) ; (/) Bantry Bay (tubes) ; (g) Scarborough 

 (tubes only). 



Page 272, Serpula (Pomatoceros) armata, after specific description 

 add Plate XX. fig. 2 (operculum) ; and after (a) Berwick Bay, Dr. 

 Johnston, add (b) Hastings ; (c, d) Polperro, Cornwall, Laughrin ; 

 (e-i) Falmouth (tubes only), W. P. Cods ; (J) Coast of Northum- 

 berland (tubes). 



Page 272, Serpula (Pomatoceros) Dj^steri, after specific description 

 add Plate XX. fig. 3 (operculum) ; and Page 273, afler (a) Berwick 

 Bay, Dr. Johnston, add (b ? c ?) Polperro, Cornwall, Laughrin. 



Page 273, after Sp. 7. Serpula Dysteri, add 

 Sp. 8. Serpula (Placostegus) tricuspidata. 



Serpula tricuspidata, Soiverby, Tankerville Cat. of Shells, Appendix i. 



no. 24 (1825). 

 Serpula crjstallina, Scacchi, Catal. Conch. Reg. Neapol. (1836). 

 Placostegus crystalliuus, PMlippi, Wiegm. Archiv, i. 192. t. 6. f. D 



(1844). Grube, Famil. der Annelid, p. 91. 



Branchial filaments about 9 on each side ; base of the operculum 

 without a process ; tube three-cornered, with 3 keels projecting 

 acutely at the mouth, dorsal keel toothed. — Grube. 

 Hab. Coasts of Scotland and Ireland. 



(a) Cork (tubes only, adhering to a dead Pinna). 



(h) Shetland (tubes adhering to stones), R. M' Andrew. 



(c) Shetland (tubes on stones), Damon'' s Collection. 



(d) Isle of Skye (a single unattached tube). 



Page 273, for Ditrupa subulata read Ditrupa arietina ; and to list 

 of synonyms add — 



Dentalium arietinvun, Milllei; Zool. Dan. Prodr. (1776). 



Deutalium subulatum, Deslutyes, Monof/r. of Dental, in Menu du Mus. 



d'Hist. Nat. (1825). ZooLJourn. iv." 194 (1829). 

 Ditrupa subulata, Berkelei/, Zool. Journ. v. (1835). 

 Serpida libera, Sars, Beskrivelser S^c. p. 52. tab. 12. f. 32 u-c (1835). 



Grube, Fnmil. der Annelid. 91. 

 Placostegus (liberus), Philippi, Wiegm. Archiv (1844). 

 Ditrupa arietina, Sars, Beisc (1849). 



After Hah. add (a) Shetland (tubes and animals), J. G. Jeffreys ; 

 (b) Shetland (tubes only), J. G. Jeffreys ; (c) Shetland (tubes only), 

 liev. A. Merle Norman. 



Page 274, Pilograna implexa, after (a) Devonshire add (b) Scar- 

 borough (mass of dry tubes) ; (c) Coast of Northumberland (diy tubes 

 in a mass); (d) Falmouth (mass of dry tubes), W. P. CocXs; (e) 

 British coast (dry tubes creeping singly, inside of a dead Pecten). 



