xvi 
CONTENTS. 
Section D.—ZOOLOGY. 
THURSDAY, AUGUST 1. 
Page 
Address by Witt1am E. Hors, M.A., D.Sc., President of the Section ...... 520 
*The Preservation of Natural Monuments. By Professor CoNWENTZ ......... 539 
FRIDAY, AUGUST 2, 
1, Experiments on Seasonally Dimorphic Forms of African Lepidoptera. 
By PSA, Dincny, NEA ME Divan os code ve canstnoeescouedsentetncsuen san aetneess teen 540 
2. Report on the Oicunaticn of a Table at the Marine Laboratory, 
PAV INOUE Ps GAO iesei scar sectes ctanj ota cceanecear te sheey yea tet me semen ae 540 
3. *Functions of the Spiracle in Sharks and Rays. By A. D. DarBisHirE 540 
4, Report on the Occupation of a Table at the Zoological Station, Naples 
(Dit4B). 55.5. cate mesos ors up obwvcnied(éus urges S00 kv one owna phew ahob leer Nmem mam .. O41 
5. Report on the ‘Index Animalium’ (p. 847) ............sseccensecseceecesesenes 541 
6. Report on Experiments on the Development of the Frog (p. 347) ......... 541 
7. Report on Colour Physiology in Animals (p. 349) ..........:ecsecseceeeeeeeeeee 541 
8, Interim Report on the Effects of Sera and Antisera on the Development 
of the Sexual Cells (p. 350) ..00....00.05-seesenessceerees seaisemi tas swateen actrees 541 
9. Interim Report on Zoology Organisation (p. 350) .......sss.sececeeneeceeeeeees 541 
10. “Seventeenth Report on the Zoology of the Sandwich Islands............... 541 
11. Joint Discussion with Section K on the Physical Basis of Inheritance. 
Opened by Professor SYDNEY J. HICKSON, F.R.S.........csccesceeesevesveeene 541 
12. *Pycnogonida (Sea Spiders). By T. V. Hopason............-....0sesesseeeee 542 
13. On some Points in the Development of Ophiothria fragilis. By Professor 
Hy, W.. MACBRIDE, MAY) (RR Sresseccssstes.serecsssseuecedddsuemateesenenamnerens 542 
14, *The Rise and Recognition of Economic Biology. By Watter E. 
OOLLINGH” (tis..cccnenees rs sev sausesssett sevesecscnnesanecune nen sees es eaten weve 642 
MONDAY, AUGUST 5. 
1, Sex in the Crustacea, with special reference to the Origin and Nature of 
Hermaphroditism. By Grorrrey SMirH, M.A, ............cecceceecececenees 543 
2. *Exhibition of Photographs of a Living Okapi. a Sir E. Ray 
ANKESTBR, Ki.C.B., FRISi«ccs0sc dos dsestac saeco cheueceeeee eben Rete Reames 544 
3. The Pendulation Theory i in relation to Geographical Distribution, By 
Professor Eby SEMROTH: 252i. sceesescoasre Neco s-tncqcshideepnt smecah <eememmmenmetas ® 544 
4, On the Systematic Position of Polypterus. By E.'S. Goopricu, F.R.S.... 545 
5. The Thickness of the Skull in Mammalia, By Professor Ricuarp J. 
ANDERSON, MGA IMD oat sc che soasaareetotetninsceseesose dveshettataseamantetrets 546 
6. Joint Discussion an Sections K and L on the Teaching of Biology in 
Schools, Opened by OSWALD Bi. LATTER. :.....ccc.0sesennvcccseccasseesesuaces 547 
TUESDAY, AUGUST 6. 
1. Note on the Structure of the Larva of Lenice conchilega. By Rey. G. A. 
ISTRIN GTON, DAS sa sieetees doo ceteteces sceckceees ov odometer ease ene 549 
. Demonstsation of Skin Varieties of Cricetus frumentarius of Thuringia. 
By Professor H, SUMROTH ©... scsesaesncesspeestesse SobsSocctesaa Heer bree ss0i05 550 
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