346 ANALYTICAL INDEX. 



CHAPTER VI. continued. 



Absorption, . . . . PAGE 171 



Structure MM. Andouin, Milne Edwards, . . ib. 



None of the specimens took food, ... ib. 



The hair loses its brilliance after separation, . . . 172 



Plate XXIV. described, . ib. 



Concluding remarks, ... ib. 



Plate XXIV. explained, .... 173 



CHAPTER VII. SABELLA AND CONGENERA, . 174 



Annelides have been denominated erratic and sedentary, . ib. 



Some which seem erratic may have permanent places of refuge, ib. 



Different species found in the Scotish seas, . . 175 



Sabella forms its own dwelling, . . . . ib. 



1. SABELLA ALVEOLAKIA, The Honeycomb Sabella, . . ib. 



Animal described, ...... ib. 



Ova, ....... 176 



A timid, lively, active creature, . . . . ib. 



Instinct displayed in constructing its dwelling, . . ib. 



Selects material for the purpose, . . . . ib. 



Night the chief season of labour, . . . . 177 



Breaches in the tube repaired, . . . . ib. 



Specimens at work, ..... ib. 



Some outstrip their neighbours, .... 178 



Greatest activity during warm weather, ... ib. 



Food unknown, ...... ib. 



Plate XXV. explained, ..... ib. 



2. SABELLA BELGICA AMPHITRITE AUEICOMA, . . ib. 



Lamarck's genus Pectinaria, .... ib. 



Many analogies detached by artificial systems, . . 179 



Size and organs described, .... ib. 



Constructs a very delicate tube, . . . . ib. 



Very timid, ...... ib. 



Found among the Shetland Islands, .... 180 



Plate XXV. explained, .... ib. 



CHAPTER VIII. TEREBELLA. 



Habits in construction similar to the foregoing, . . 181 



The terms mason or potter might be aptly applied to the Terebella, 182 



