306 



ANALYTICAL INDEX. 



CHAPTER IV.— continued. 



§ 7. Ckisia eburnea, 

 Described, 



Hydra ascidiaD, with 8 tentacula, 

 A parasite, 

 Plate XIX., figs. 8-13, explained, 



§ 8. CORYNA GLANDULOSA, 



It has no proper hydra, 

 Spontaneous inflexion, 

 Spherules or gemmules, 

 Where found, 

 Plates XXI., XXII. explained, 



I- AGE 68 

 ib. 

 ib. 



69 

 ib. 



ib. 

 ib. 

 70 

 ib. 

 ib. 

 71 



CHAPTER V. — Calcareous Zoophytes, 

 Various elements combined, 



§ 1 . Flustra membranacea, 



Invests the Laminaria digitata, 



Diffuses in a single stratum, 



Spines on the cell, 



Increment, ..... 



Plate XXIII. explained, 



§ 2. Lepralia, ..... 

 Subject for permanent study, 

 Rate of increment irregular, 

 (1.) Lepralia pustula, 

 Diffuses from a central point, . 

 Plate XXIV. explained, . . . 



(2.) Lepralia Edentata, Plate XXV. fig. 1, 

 Hydra with 12 tentacula, 



(3.) Lepralia punctata, Plate XXV. figs. 2, 3, 

 (4.) Lepralia nitida, fig. 4, 

 (5.) Lepralia lineata, fig. 6, 

 Orange corpuscula in the cells, 

 (6.) Lepralia Margarita, 

 Invests mussel shells, 

 Orange spherules in the cells, figs. 7-1 2, 

 (7.) Lepralia Spinosa, 

 Spines interspersed with the cells, 

 Plate XXVI. figs. 1,2,. 



72 

 ib. 



ib. 

 73 

 ib. 

 ib. 

 ib. 

 ib. 



74 



ib. 

 ib. 



75 

 76 

 ib. 

 ib. 

 ib. 

 77 

 ib. 

 ib. 

 ib. 

 78 

 ib. 

 ib. 

 ib. 

 ib. 

 ib. 



