200 INDEX. 
Page Page. 
Haeckel, E., descriptions of fossil medusz by ------ 66-67, | Medusites bicinctus(— Medusina bicineta), descrip- 
71-79, 84-85, 86-87, 88-89, 93, 94, 95 tOMIOL << fen ccates Sa csee seen eee 94 
copies of figures of medusz given by-------.---- 182, | Medusites circularis (—Medusina circularis)---.--- 95 
188, 190,192,194 | Medusites costatus (—Medusina costata), deserip- 
Hayes, C. Willard, cited on microscopic character 
of siliceous nodules containing fossil me- 
Pi hs (21s eee ee ana ee hacen eae Leb} 
acknowledgments to ------ --- 13 
Helminthoidichnites marinus, figures of ------------ 158 
Hexarhizites insignis, description of ------------- 82, 86-88 
jal Se) 0) fee ees ee ee oeee reece eercoeesoces MAID 
Hinde, G.J., cited on solution of silica of sponges by 
oceanic waters ---.-- --------------------.-_--- 20-21 
Iddings, Joseph P., cited on microscopic characters 
of siliceous nodules containing fossil me- 
(Gholstz2) Becee oe arian ere Se ee aoe Oo aee ees eee 
Jurassic medusz, list of ------------------------------ 
occurrence and character of_- 
descriptions of ..-.---.---------------------------- 
Classification Ofssnn=snee aea aes ese 
Kner, R., cited on Medusites eretaceus-------------- 98 
Kolliker, A., cited on reproduction of Discomeduse 
by lateral fission -----.-----------------..--.-- 
Lang, A., cited on Gastroblasta raffaeli------------- 
copies of figures of meduse given by 
Laotira, description of ----.------------ 
Laotira cambria, descr iption of -- 
figures of ------- 34, 35, 36, 37, 114, 116, 118, 120; 122, 124, 126, 
128, 130, 132, 134, 136, 138, 140, 142, 146, 148, 150 
Leptobrachites gigantea, description of_------------ 90-91 
Leptobrachites trigonobrachius, description of. -__- 88-89 
figures of 89-90 
Leuckart, R., cited on Leptobrachites trigonobra- 
(lebhil?}. ess seesecer 2. Seren Sasso ses ae Eee 89 
Linnarsson, J. G.O.,cited on Agelacrinus (?) lind- 
strémi (— Medusina costata)----------------- 49-51 
original description of Astylospongia radiata 
(= Medusina radiata) by------------.-------- 56-57 
cited on Hophyton=.-----_---.-----.-- ---2\-------- (59-60 
copies of figures of meduse given by --------- 160,168 
Marion and Saporta, cited on Eophyton 
(Mabtherw. Geil: sad 0) yen = en ene eee neem 
Medusichnites, figures of - ----------------.----------- 196 
Medusichnites (?) latilobatus, figure of-----.-.----_- 100 
Medusina, description of ---.--------.---------------- 49 
Medusina atava, description of -- Best ae eee eet OD= U0: 
tigure showing restoration of --------.---------- 96 
Medusina bicincta, description of -----.------------.- 94 
figure of 194 
Medusina circularis - 95 
Medusina costata, description of ~---.--------------- 49-54 
ibe eRe S10) teen ne eee ees fae s see Soe 160, 162.164 
Medusina deperdita, description of _. 91-93 
OF OP CSO tee 2, 192 
Medusina porpitina, description of 95 
figure of 
Medusina princeps, description of ---.----- 
figure of 
Medusina quadrata, description of = 
rife tle) (0) tase noes se eee S nee se eciesesie 2heete aces 
Medusina radiata, description of 
figures of 
Medusina staurophora, description of_--------.----- 94 
fire Of see ee ee ee eee 188 
Medusites antiquus (= Acraspedites antiquus), de- 
scription of 
Medusites atavus (= Medusina atayva), description 
Of oo55- 25,2265 sacs sede Sade Jae eeneee 
95-96 
GION. Of eas ean een eae 
Medusites cretaceus, description of------ 
Medusites deperditus (—Medusina deperdita), de- 
Seription Of noi 5. eG eae eee eres 91-93 
Medusites fayosus (= Medusina princeps), descrip- 
tlomofe scan. sont ee eeee eee aeons 54-55 
Medusites helgolandicus ----..-----.----------------- 99 
Medusites latilobatus, description and figure of -__- 99 
Medusites lindstrémi (— Medusina costata), descrip- 
tion!) Of 22 oe se ee eee ete eee 49-54 
Medusites princeps (= Medusina princeps), deserip- 5 
thlonOl<ccseco aor oc sees see eee ees 5455 
Medusites porpitinus (—Medusina porpitina), de- 
SCTIPLON OL saan. eee ee eee eee re 95 
Medusites quadratus (—Medusina quadrata), de- 
BTID GON Of eters ya re tne arene 93 
Medusites radiatus (— Medusina radiata), descrip- 
iblomVOlé sc sc se eee eee ee te eee ee 56-58 
Medusites staurophorus (= Medusina stauropho- 
ra), description! of c-cs.ss2aceo- sess eeat a nonee= 94 
Murray and Renard, cited on source of silica in 
OCCRNIC WALCIS mae eet eae ee set eas 20 
Nathorst, A. G., cited on Lower Cambrian medusee_ 47-48 
cited on Medusiteslindstrémi (— Medusina cos- 
tata): 22 2 cena secns ce neneeesceaeeee eee 51-52, 53 
cited on Medusites favosus (—Medusina prin- 
CODS) Sa oee ne ee ee ees 54 
description of Medusites radiatus (= Medusina 
radiata) Dy:<-<-5s:2ss2ess-sn=28 ee es eae 57 
cited on Eophyton 
copies of figure of medusee given by 162, 164 
Nodules (siliceous) containing fossil meduse, dis- 
COVERY: Olean sense eee ee ix,3 
character and occurrence of_..--..-..-.--------- Bt 
lithologic character of 
mOodeiOL OCCUrreNnCe Qtanence == eee a ee 13-14 
Chemical Gharacveni0 te sene sees ae eet 14 
microscopic character of ----.-------------------- 12-14 
Pabst, Wilhelm: aid piyean sane aa eee ix, 96 
Palegina gigantea (— Leptobrachites gigantea), de- 
SCIP GON! Ola seen he eer 90-91 
Pelagide, description of genus of -__----_------------ 75-76 
Pelagiopsis leuckarti (—Leptobrachites trigonobra- 
chius), description of -_----------- 
Permian meduse, descriptions of 
Planolites, figures Of-sesa— sane sen nen a eee 
Pohl iH; aid) byes see ete ee ae eee ees 
Polyclonia frondosa, habits of - 
Pompeckj, J. F., aid by -- ix 
cited on Medusites radiatus (= Medusina radi- 
DT emacs ons Sancbanee oc eteeccsess See See 58 
Protolyellia princeps (=—Medusina princeps), de- 
Gnk aimee (ime nae eee a ee ascceses sense 5 
Rauff, H., cited on Hophyton---------.------ ----_--= 
Rhizostomites, figures of restorations of ------------ 
Rhizostomites admirandus, description of -- 
figures of-__--_--- 
Rhizostomites lithographicus, description of----..- 79-85 
figures Of 2 =e oo eee ee ee 186,188 
Saporta, G. de, cited on Eophyton------------------- 61-62 
Schizocladium ramosum, description of process of 
fission exh bibedipyeeses ess. sees ener 40-41 
Schmidt, F., cited on Medusina costata -_-.....--.-- 53-54 
Schuchert, Charles, aid by_------------------------ pe ashe 
