1921 



INDEX 



63 



Pages <?■■ Plates 

 Retenticeras CLXVl 



retentum 



retentum clxvi 



reversum cxlv 



Rhytostephanus ccl 



rhytus 



rhytus ccl 



Ringsteadia S3. CCXXV 



anglica 



roberti 19 



robinsoni . . ccxx 



Rostrum, incurving 9 



rotundum 54 



rudis 37 



— horizon 40 



Kugiferites 43, 46, 51 



rugifcr 



rugifer 40 



rufus 39 



runcinate venter 53 



— -ornate venter 53 



Runcinati 53 



Rursiceras cxlv 



reversum 



rursum . . . 23 



sagitta 19, cclx 



Sagitticeras .. .. 19, 21, 55, cclx 



fastigatum, sagitta 



Sagittoceras 55 



Sands, Littlemore . . ccxliii b 



scarburgense horizon 10 



Schlotheimia lacunata . . . . 6 

 septicarina clxviii 



— obsolescent . . clxxxi b 

 septum in carina . . . . ccv b 



serpentiniformis 55 



serpentinus . . 55, cxxxvm a 



Shelly Beds 43. 44 



Siemiradzkia 26, 31 



— (gracilis) cxcm 



— (Amm.) Bakerias . . . . 31 

 Sigaloceras . . 41, 53. 54. CCLV 



micans 

 Sigaloceras (Amm.) calloviensis. . 54 

 Skirroceras 2i,ccxlviii 



macrum 

 Skirroceras macrum . . . . ccxlix 



Skirroceratan 28 



sknipum 48 



Skolekostephanus . . . . ccxlix 



skolex 



skolex ccxlix 



Slide-rule n 



Sonninia (fissilobata) . . clxxxi a 



— , mammillate cl 



— , tuberculate ccv 



sphaera 4 8 . clxvii 



Sphaeroceras 22, cclviii 



tutthum 

 Sphaeroceras brongniarti . . cclviii 



— contractum . . cxli 



— perexpansum . . cxxxiv, 



cxxxv 

 Sphar-roceratid, coronate . . ccxv 



Sphaeroceratida? 22, 43 



sphaeroidalis 49 



Pages <~ Plates 

 Sphaeromorphites .. .. 43, 40 51 

 sphaeroidalis 



sp., Kinkeliniceras 42 



— , Proplanulites 34. 35 



spinifera clxviii 



spiniger clxv 



Stemmatoceras 21 



Stephanoceras . . . . 44, 45, 48 



— bayleanum . . CCXLVHI, 



cclxv 



— braikenridgii . . cli, clii 



— coronatum 45 



— humphriesianum . . ccxxix 



— macrum ccxxx 



— subcontractum 49 



— zigzag 30, cliii 



Stepheoccras . . . . 6, 21, ccxxix, 



ccxxxvin 



humpliriesianum, plagium 



Stepheoceras freycineti . . . . ccl 



Stepheoceratacea, earliest . . . . 6 



Stepheoceratan venter . . . . 29 



Stepheoceratidas 21, 43 



stibarum 18, cxcvn 



stiphrus 38 



Stomphosphinctes . . . . ccxlvii 



stomphus 



stomphus ccxlvii 



Stonesfield Slate 43 



Strata, Argovian 10 



— Fullers' Earth Rock, Great 



Oolite 51 



Stratal Sequence 40 



Strenoceras .. 29, 53, ccxxxix 



apleurum 



Strigoceras truellei 30 



subcontracts 45 



subcuneatus 37 



subcuneiformis . . . . 37, ccxxvn 



subdivisus cxc 



subordinarium clxxii 



Subparkinsonia 29 



subrefractum . . . . 24, clxxvi 



subserpentinus . . . . 55, ccxvii 



Sutneria 7 



Suture-line, dorsal lobes ccxxxvin 

 Synthetograph 26, 43, 49, cxxxiv 



Syntopite 11 



Systematic 12, 32 



teisseyrei 34 



Teloceras 21, 43, 45 



— subcontractum 52 



tenuicostatum clvii 



Terminology 5, 11, 31 



Thornford Beds 43. 5 1 



titan . . ccxxxi 



Titanites ccxxxi 



titan 



tolmerum 48 



tornquisti . . 35 



Tragophylloceras ccxix, 



ccxx, 

 ccxxxiii 

 huntoni, numismalis, 

 robinsoni 

 tridens 3^ 



