LIST OF ILLUSTRATIONS. 
FIG. 
230. Stages in molluscan development . . 
231. Proneomenta. Nervous system—from Hubrecht | . 
232. Section of shell of Nautilus—after Lendenfeld . . 
233. The Pearly Nautilus (Mautdlus pompelius)—after Owen 
234. Male of Balanoglossus (Dolichoglossus) howalevskit—after 
Bateson. 
235. Transverse section through. gill- -slit region of Piychodera 
minuta—after Spengel .: 
236. Direct development of Dolichoglossus—after Bateson 
237. Tornaria larva, from the side—after Spengel _—_—. 
238. Piece of a colony of Cephalodiscus, showing the tubes in- 
habited by the animals—after Ridewood i 
239. An individual Cephalodiscus—after Ridewood ? 
240. Dissection of Ascidian—after Herdman . P 
241. Diagram of Ascidian—after Herdman 
242. Young embryo of Ascidian ( Clavelina)—after Van Beneden 
and Julin 7 
243. Embryo of Clavelina—modified after Seliger ‘ . 
244. “Nurse” of Doliolum miilleri—after Uljanin : 
245. Sexual individual of Dololum miilleri—after a é 
246. Diagram of Salpa africana . . 
247. Anatomy of Appendicularia—after Herdman E 
248. Lateral view of Amphioxus—after Ray Lankester . , 
249. Transverse section through phenees region of Amphioxus 
—after Ray Lankester . 
250. Development of atrial chamber ‘in Amphioxus—alter 
Lankester and Willey . 
251 and 252. The nephridia of ‘Amphioxus—after Boveri 2 
253. Early stages in the development of Amphioxus—after 
_ Hatschek 
254. Sections through embryos of Amphioxus, to illustrate de- 
velopment of body cavity . 
254A. Portions of excretory systems of Phyllodoce and Api 
oxus—after Goodrich 
255.°Transverse section through an Elasmobranch "embryo 
(diagrammatic)—after Ziegler . 4 
ase and 257. Ideal fore and hind limb—after Gegenbaur : 
258. Partial section of brain of young Vertebrate. c 
259. Vertical section of the ne eye in an embryo of Spheno- 
don—after Dendy 
260. Diagram of parts of the brain in Vertebrates — after 
Gaskell . a . 5 : 
261. Diagrammatic section of spinal cord 
262. Diagram of spinal cord of man, thoracic region— after John- 
ston ; 
263. Diagram showing the ear and related parts in a young cat . 
264. Diagram of the eye . 
265. Development of the eye—after Balfour and Hertwig 
266. Origin of lungs, oe and Meret in the chick—after 
Goette . . . : ‘ 
