Opinions from J. B. Delair 1960
- 'Cetiosaurus humerocristatus is recombined as Ornithopsis humerocristatus'
- 'Echinodon becklesii [misspelled as Echinodon becklesi] belongs to Echinodon'
- 'Ichthyosaurus brachyspondylus is a subjective synonym of Macropterygius thyreospondylus'
- 'Ichthyosaurus breviceps is recombined as Eurypterygius breviceps'
- 'Ichthyosaurus campylodon is recombined as Myopterygius campylodon'
- 'Ichthyosaurus chiroligostinus is a subjective synonym of Leptopterygius platyodon'
- 'Ichthyosaurus chiroparamekostinus is a subjective synonym of Eurypterygius communis'
- 'Ichthyosaurus chiropolyostinus is a subjective synonym of Eurypterygius communis'
- 'Ichthyosaurus chirostrongulostinus is a subjective synonym of Leptopterygius tenuirostris'
- 'Ichthyosaurus communis is recombined as Eurypterygius communis'
- 'Ichthyosaurus conybeari is recombined as Eurypterygius conybeari'
- 'Ichthyosaurus cuvieri is a subjective synonym of Macropterygius trigonus'
- 'Ichthyosaurus dilatatus is recombined as Macropterygius dilatatus'
- 'Ichthyosaurus enthekiodon is recombined as Nannopterygius enthekiodon'
- 'Ichthyosaurus extremus belongs to Ichthyosaurus' according to Boulenger 1904
- 'Ichthyosaurus extremus is recombined as Brachypterygius extremus'
- 'Ichthyosaurus giganteus is a subjective synonym of Leptopterygius platyodon'
- 'Ichthyosaurus grandipes is a subjective synonym of Leptopterygius tenuirostris'
- 'Ichthyosaurus immanis is a subjective synonym of Leptopterygius platyodon'
- 'Ichthyosaurus intermedius is recombined as Eurypterygius intermedius'
- 'Ichthyosaurus latifrons is recombined as Leptopterygius latifrons'
- 'Ichthyosaurus lonchiodon is recombined as Leptopterygius lonchiodon'
- 'Ichthyosaurus longirostris is a subjective synonym of Leptopterygius latifrons'
- 'Ichthyosaurus normanniae is a subjective synonym of Macropterygius trigonus'
- 'Ichthyosaurus ovalis is recombined as Macropterygius ovalis'
- 'Ichthyosaurus platyodon is recombined as Leptopterygius platyodon'
- 'Ichthyosaurus posthumus is a subjective synonym of Macropterygius trigonus'
- 'Ichthyosaurus sinuatus is a subjective synonym of Leptopterygius tenuirostris'
- 'Ichthyosaurus strongylostinus is a subjective synonym of Leptopterygius tenuirostris'
- 'Ichthyosaurus tenuirostris is recombined as Leptopterygius tenuirostris'
- 'Ichthyosaurus thyreospondylus is recombined as Macropterygius thyreospondylus'
- 'Ichthyosaurus trigonus is recombined as Macropterygius trigonus'
- 'Iguanodon hoggii [misspelled as Iguanodon hoggi] belongs to Iguanodon'
- 'Ischyrosaurus manseli is recombined as Ornithopsis manselli'
- 'Megalosaurus bucklandii [misspelled as Megalosaurus bucklandi] belongs to Megalosaurus'
- 'Megalosaurus nethercombensis belongs to Megalosaurus'
- 'Megalosaurus parkeri belongs to Megalosaurus'
- 'Nuthetes destructor belongs to Nuthetes'
- 'Omosaurus is a subjective synonym of Dacentrurus'
- 'Ophthalmosaurus icenicus belongs to Ophthalmosaurus'
- 'Ophthalmosaurus pleydelli belongs to Ophthalmosaurus' according to Lydekker 1890
- 'Ophthalmosaurus pleydelli belongs to Ophthalmosaurus'
- 'Ornithopsis leedsi belongs to Ornithopsis'
- 'Scelidosaurus harrisonii [misspelled as Scelidosaurus harrisoni] belongs to Scelidosaurus'