280 Messrs. Parker and Jones on 



affected ; and there is the Burmese family observed "by succes- 

 sive ambassadors at the court of Ava, where father, daughter, 

 and grandson had the body, with the exception of the feet 

 and hands, covered with long, straight, silky hair. And from 

 these and many similar cases it would seem a natural inference 

 that, just as the bones and dermal covering vary with altered 

 nutrition, so also do all other parts of the organism, which are 

 less easily observed. 



In conclusion, it has been seen that growth depends upon 

 a kind of organic dialysis, called nutrition, which is sustained 

 throughout the body by the mechanical actions of the parts of 

 the organism which produce pressure and tension, while the 

 direction in which this action is manifest is due to the com- 

 mon plan on which the individual is built. And the amount 

 of the change is due to the change of structure produced in 

 the individual by changed function inherited in the offspring, 

 and partly by the realization in the offspring of such structures 

 as the parent's functions tended to produce, but which its 

 common plan rendered impossible for itself to develope. And 

 with this condition of variation, the general inference from 

 the phenomena of growth is, that the form of the whole 

 skeleton, as of every bone, is due to the mechanical strains to 

 which it is subjected, since these govern its nutrition. 



[To be continued.] 



XXIX. — On the Nomenclature of the Foraminifera. By W. 

 K. Paekee, F.R.S., and Prof. T. Rupeet Jones, F.G.S. 



[Continued from p. 230.] 



NummuUtic Limestone of Gyzeh and Mokattam *. (Abhandl. 

 Berl. Akad. Wiss. 1838, p. 93, tables xiv. xvi. pi. 4. fig. vii.) 



PI. xxiii. fig. IjMiUola sjyhoiroidea ("compare Cenchridmm 

 oliva, 1843 "), and fig. 2, M. ovum^ are both Lagena ghhosa ; 

 but the second specimen is longer in proportion (oval-oblong). 

 Fig. 3, Textilaria glohidosa (1838), a, fig. 4, /3. obtusa, fig. 5, 

 7. amplior^ fig. 6, h. dilatata^ are Text, glohulosa^ Ehr. Fig. 7, 

 T. linearis (" T. striata^ 1838, is known only in fragments "), 

 fig. 8, Grammostomum polytheca (?), figs. 9 & 10, Gr. a^gyp- 

 tiacum^ figs. 11 & 12, Gr. angulatum^ fig. 13, Gr.falx, fig. 14, 

 Gr. siculum (?), fig. l5, Gr. increscens^ fig. 16, a, J, Gr. poly- 



* See Mr. Bauerman's section of the Mokattam Cliftj Quart. Journ. 

 Geol. Soc. London, vol. xxv. p. 40, where references are made to the 

 works of Figari Bey and Oscar Fraas. See also Russegger's ' Reisen in 

 Europa, Asien, und Afrika,' «fec. 5 vols, and Atlas, 1841-42. 



