172 Description of Plates 



PLATE II. 



Fig. 5. A. bnincldaliis Audouin and Edwards (.4. grubii Claparede), from 



Plymouth. 

 Fig. 6. ^1. branchial is, anterior end, dorsal aspect. The first notopodium was 



wanting, a condition not uncommon in this species. 



Fig. 7. A. ecaudata Johnston, from Plymouth. . 

 Fig. 8. A. ccaudata, anterior end, dorsal aspect. 



PLATE III. 

 Fig. 9. A. loveni Kinberg, from Saldanha Bay, Cape Colony. 



PLATE IV. 



Figs. 10, 11. Dissections of the anterior portions of A. marina (Linnaeus) 

 (Fig. 10), from Musselburgh, and A. loveni Kinberg (Fig. 11), from 

 Saldanha Bay. The specimens were opened along the mid-dorsal 

 line. Compare their septal pouches and nephridia. The septal 

 pouches of the specimen of A. marina were dilated ; they are 

 usually rather smaller than they are here represented. 



PLATE V. 

 A. cristata Stimpson. 



Fig. 12. A specimen from Naples, with full number of tail-segments. 

 Neuropodia were absent in the first two chaetiferous segments. 



Fig. 13. Last chaetiferous segment and tail (consisting of only eight 

 segments) of a specimen, from Wood's Holl, Mass., to show the 

 caudal processes, one of which on the first tail-segment is branched 

 end gill-like. 



PLATE VI. 



Fig. 14. A. glacialis Murdoch. Type specimen. Note the presence of an 

 eighteenth neuropodium. The buccal mass and pharynx are fully 

 protruded. The tail is, in the specimen, strongly contracted ; it 

 has been represented in the figure in a condition of more normal 

 extension. 



PLATE Vn. 



Fig. 15. A. 2)usilla Quatrefages (A. claparcdii Levinsen), from Naples. 



Fig. 16. A. assimilis Ehlers, from Uschuaia, Beagle Channel. Co-type from 

 Naturhistorisches Museum, Hamburg. 



PLATE VIII. 



Fig. 17. A. cristata Stimpson, from Naples. Dissection of the anterior portion. 

 The specimen was opened along the mid- dorsal line. Note especially 

 the nephridia, the small oesophageal glands, and the septal pouches. 



Fig. 18. A. pusilla Quatrefages (A. claparedii Levinsen), from Naples. Dis- 

 section of the anterior portion. The specimen was opened along 

 the mid-dorsal line. Note especially the nephridia, the oesophageal 

 glands (five pairs), and the absence of septal pouches. 



