RuppelPs Neue Wirbelttiiere. '27 i) 



place in the form of the shield at the different periods of their growth, 

 and in the number of plates of the shield and the head of the ani- 

 mal, indifferent specimensof the same species. Carrelta bissa, Riipp. 

 Tab. 2, and C. olivacea, Eschscholtz, Tab. 3. Agama colonorum, 

 Daud. Tab. 4. Stellio cyanogaster, Riipp. Tab. 5. Trapelus flavi- 

 maculatus, Riipp. Hemidactylus Jlavi-viridis,Tl\iipp. ; and Pristurus 

 Havipunclatus, Riipp. Tab. 6. are all interesting, as being figured and 

 coloured from the living animals. And the genus Pristurus, appa- 

 rently belonging to the slender-toed Geckoes, and very peculiar for 

 having a long, much compressed tail, serrated on both its edges, is 

 now described and characterized for the first time. 



Pristurus, Riipp. Char. Gen Caput subdepressum, breve, antice rotundatum : 



Nares laterales prope apicem rostri : oculi magni, pupilla noctuma, subrotun - 

 da : membrana tympani profunde latens : lingua crassa, depressa, apice integro : 

 dentes maxillares integri sequales, uncinati • cutis trunci sublasvis, subtilissime 

 reticulata : pedes pentadactyli, digiti graciles, rotundati, elongati, uncinati : Cau- 

 da compressa, elongata, supra et infra carina serrata : pori femorales nulli. 



Of the fishes, forty-six species are described and figured in the two 

 numbers already published, most of them are coloured from the fish 

 when alive. Among them are what Dr Riippell considers the types 

 of four new genera, of which we shall add his characters. 



Enneapterygius, Riipp. Char. Gen Caput alepidotum, preoperculum carinis 



duabis, operculum supra pinnas pectorales elongatum. Os labiis carneis, denti- 

 bus setaceis minutissimis per multis armatum, membrana branchialis sub gula 

 continuata, radiis 7. Corpus squamis magnis, margine serrato ; linea lateralis 

 sola parte anteriore expressa, pinnae dorsales tres, duse anteriores spinosas. Pinna? 

 ventrales thoracici, radiis binis veluti Blennii. Allied to Scorpaena. Species, 

 Enneapt. pusillus, Riipp. 



Gazza, Riipp. Char. Gen — Corpus compressum, cute squamis minutissimis 

 tecta ore mediocri, multum protractili, unica serie dentium uncinatorum ar- 

 mata, e quibus nonnulli fortiores elongati. Dentes palatinalis et vomerales nulli 

 preoperculum margine duplici, externo parte inferiore serrato- Characteres re- 

 hquis generis Equula prseter spinas ad latera pinnae dorsalis et analis, quae tactu 

 sed non visu conspicuae sunt. Allied to Equula. Species, Gazza equulcefor- 

 mis, Riipp. 



Pseudochromis, Riipp. Char. Gen Dentes in utraque maxilla uniseriati, 



minuti, conici, antice fortiores, irregulares, uncinati ; dentes palatini spha?roidei 

 minutissimi, triplici plaga dispositi, arcum semilunarem aequantes ; dentes pha- 

 ryngei uncinati, setiformes ; rictus oris minutus. Labia mediocria ; os non pro- 

 tractile ; operculum angulo postico elongato, preoperculum margine integro^ 

 utrumque squamis minutis tectum ; apertura branchialis sub gula continuata ; 

 membrana branchialis radiis sex. Linea lateralis interupta. ; radii tres ante- 

 riores pinna; dorsalis et analis spinosi, reliqui flexibiles. Allied to Julis, Cuv 



Species, Pseud, olivaceus, flavivertex, Riipp. 



Xenodon, Riipp. " Char. Gen — Dentes in utraque maxilla 8, ordonati, com- 



