IV Contents. 
PAGE. 
IV. Further Studies on the Chemistry of Light Production in Luminous Organisms. 
By E, WNEWION HARVIY: obo pie peeem cei ircaas o Sac cc oly eerene'e ieaiels oe 75-110 
I. Reversibility of the Photogenic Reaction in Cypridina.................. 77-86 
II. Chemical Nature of Cypridina Luciferin and Cypridina Luciferase....... 87-103 
Preparation.or Matertall 52)... o</cc05. <3 <creve's wie ofca: ste asl atarnysyate Melee necator 87 
PNCHIOR JOG HAN ZY EES sla oarejo keris chee anak cieiicsclnicet a, 2100s ie sono ne iene eckeneae ieee tc 90 
SATII SONU cle shala ac. axe wh tevc see oys Dicuss sn ane eel ate cas re te een eR 92 
NI GGHOM AIG A COLOHG so) 5:c/cccroie ase Scheie coe 4 tose oe ste ecole aber) sey 0 peice 95 
Sombility im Organic Solvents... <o5..acccosess 1 vias ant 6 Sere emis 96 
IAN Ic AOE ARGAPEMUS(., 5 co cieccieia 24s waste apclokensc osieteictsuattocsevone]s Ste ce one ae ae 97 
leary selictal Salbswci.t ea. s'nyeqoiaic etnies mie aie eis o ec eyeuelene tim oo seer 99 
ACG ley have ys NID Eh (ars ee oie a Oia TS care na aeniecrrians Bio's ainiata ato ow /c'6 c 101 
IABSONDENES Noe ct b «Monten cicie si a RKE ee che Rete © Ge enays oles icmen seal pete aceon 102 
@onehiswonss. (0 2.3 Foe eee es See eee lies o okeres ele eieeeian 103 
SLL a ee iin Iie iret cient hrcm oes crmion: Cocco ae 106 
LT 1 Ca ee as eae Lee, Penns RUAN a) Ce NE Bree ae 108 
V. Ovary of Felichthys felis, the Gaff-topsail Catfish: Its Structure and Function. 
By bh. W.'Gupanr. )4 platesiand Uiigure co oss ieyern op ste eie oks s ouee 111-127 
1 SeHgota 15 (41 71(0) 1 See ei Pe a SE eh gs Monreal rs, I A WPMD Pe Gi 113 
The Breeding Female Gaff-topsail Catfish... . 0. 2. 66.52.2065. 2 ee ade t cise ees 113 
‘The Ovary. Viewed Pixternaliy. oo 3.55 js60'ssia oxtte ib os tee erate ee are eee 114 
intemal Structure Gl:the Ovary..t o.2. ad cae ds ceeeeemee s+ cane ou ar + opetenne 115 
Relative Sizes of Immature, Spent, Half-ripe, and Ripe Ovaries.............. 17 
Pm mature OVATies 5 .c4 i856 veka 0:05 ars. ene wee iene Sale i eee ietarant ang eyneieme 117 
Sent OVMICR cn. sade hoe ce elon humeule ag aemigeete eminence Greate cla sitet 118 
Half-ripe or nearly Ripe Ovaries cscens- cates «25 0i0ib 5:3. cusiole dpa ere ni iepei sisi 121 
EUG OrvaTICS gone 2! ya hishacercvesdee ooticnes ore 5, genet aaa ogthalasslat Nae ce ka ra 121 
Size'of Eges and. Number Pound im/Ovary...22 05000 coco one. 6 s0 0.5 sae eens 123 
EISHOTIGA HA COOUTIES sc scrvsusiate 6 oie sos Saye ele seicoue hue aero Ocoee Teh pea ex ele eaters 124 
