ERRATA. 
WOin IW, IPAIRM 51, 
PAGE 
75. The reference to Plate CX VIII, fig. 11, under Sabellides octocirrata, for body read tentacle. 
83. The reference should be Plate CXXYV, figs. 1—1b, under Melinna cristata. 
126. The reference to Plate CXIV, fig. 6, under Polymnia nesidensis, should be removed. 
137. 8e should be 8d in the list of figures under Lanice conchilega. 
149. For Genus CXLVII read CXLVIII. 
150. Remove 6a from the list of figures of Nicolea venustula. 
209. For Genus CXL read CLX. 
Vou. IV, Parr u. 
339. Filograna implexa. Add Plate CXVI, fig. 5b-—body, with operculum and ova, fig. 8—operculum. 
386. In table, delete “ S. granulatus, L.” 
Note.—The same letters are used in the text-figures as in the previous part, with the following 
additions : 
br. Bristles. 
brv. Branchial vessels. 
bv. Blood-vessel. 
c. Lobe of collar. 
ch. Chordoid skeleton. 
gl. Thoracic gland. 
m. Special ventral longitudinal muscle. 
so. Duct of thoracic gland. 
vert.m. Vertical muscles. 
