44 $ch. 
?IV. ECgitfOPERMA. 
Maretia : — iM.pareti ; Mazzetti (108) p. 428. M. planulata ; Sluiter 
( 151) p. 73 : colour-characters ; Koehler (77) p. 416. f M. simplex 
(olim Spatangus), Sardinia ; Cotteau (26) p, 52. 
Mellila longifissa , M. sexforis , M. stokesii, if. testudmata ; Sluiter (151) 
, P- 73. 
iMelonites : — M. crassus (p. 126), M. multipora, refigured (p. 125) ; 
Keyes (70). 
fMeoma : — M. brevipetala is a crushed Pericosmus compressus ; M. craw- 
fordi , syn. of Pericosmus compressus ; M. tuberculata ; Tate (157) 
p. 125. 
Mespilia globulus ; Sluiter (151) p. 70. 
Metalia maculosa , M.sternalis ; Sluiter (151) p. 74. 
t Metaporinus convexus y Tithouian, Italy ; Corti (24) p. 386. 
fiftcraster, defined and discussed (p. 156); pre-Kleiuian descriptions discussed 
(p. 248) ; M. aichensis, perhaps young of if. peini (p. 247) ; if. anceps 
[not a n. sp. as one would suppose, but] a new var. of if. decipiens 
(p. 245); if. antiquus , probably not Cenomanian, and a close ally of 
. M. aturicus (p. 227) ; if. arenatus , Sism. non Agassiz, maintained 
(p. 181); M. arnaudi [not a n. sp. as one would suppose, but] a new 
var. of if. turonensis (p. 244) ; if. aturicus, Seunes ex Hubert, 
probably syn. of if. antiquus (p. 230) ; if. beonensis , discussed (p. 225) ; 
M. borchardi. (p. 212) ; if. breviporus, really due to Hebert, 1866, not 
Agassiz, 1840 (p. 178), defined and discussed with its varieties, which 
include if. normannice (p. 204) ; if. brevis , Desor, fully discussed, = 
Spatangus gibbus , Goldf. (p. 182) : Lambert (83). if. brevisulcatus , 
figured ; Mazzetti (108) p. 426. if. brongniarti , defined and dis- 
cussed, with vars. pseudoglyphus , marginalis, sismondce (p. 199); 
M. bucaillei , probably var. of if. coranguinum (p. 234) ; if. cayeuxi , 
discussed (p. 232) ; if. coranguinum i fully discussed (p, 163) ; 
if. corbovis , discussed (p. 194) ; if. cor columbarium, maintained and 
discussed (p. 202) ; if. cordatus , Agassiz, rejected in toto (p. 179); 
if. cortestudinarium , defined and discussed (p. 174) ; if. cotteaui 
(p. 247); M. decipiens , maintained and discussed (p. 217); M. fastigatus, 
probably syn. of if. gibbus (p. 227) ; if. gauthieri , discussed (p. 232) ; 
if. gibbus , dofined and fully discussed, with synonymy (p. 168) ; 
if. glehezei (p. 198) ; if. glyphus, discussed and compared with 
if. schlcenbachi (p. 209) ; if. gosseleti , discussed (p. 229) ; if. gourdoni , 
discussed (p. 229); M. grossouvrei [not a n. sp. as one would suppose, 
but] a new var. of if. coranguinum (p. 245) ; if. heberti (p. 212) ; 
i/. heinzi (p. 247) ; if. idee (p. 211) ; if. incisus , rejected (p. 247) ; 
if. integer , referred to Cy cluster, and distinguished from “ lsopneustes 
integer ” of Seunes (p. 198) ; if. intermedius, a mutation of if. 
turonensis (p.222) ; M. larteti, Munier Chalmas MS., Senonian S.E. of 
Yitoria, Spain, described, but considered as var. of if. corbaricus 
\ (p. 242) ; if. latiporus , discussed (p. 208) ; if. latus , Sism. wow Agassiz, 
, maintained (p. 181) ; M. laxoporus, defined and discussed, with vars. 
campaniensis et duranica (p. 195) ; if. lesJcei t discussed (p. 178) ; 
