1S93] ^lO [Bam. 



II. Notes on Some Types of the Testudtnata Collected by Spix 

 AND Preserved in the Zoological Museum at Munich. 



Rhinemys. — In my note on the genera Hydraspis and Rhinemys {Am. 

 Naturalist, May, 1890), I have staled that the number of the neuralia in 

 Rhinemys rufipes Spix, the type of Rhinemys, was not yet known. I 

 have now examined tlie type specimen and have found that the number 

 is seven. All the pleural ia 1-7 are separated by the neurals ; the pleu- 

 ralia 8 alone are in contact. 



Emys erythroeephala Spix, 1834. 



An examination of the type specimen shows that this species is identi- 

 cal wiih Podocnemis vnifilis Troschel, 1818 ; the name Podocnemis erythro- 

 cepluiia has therefore to be used. 



Emys amazonica Spix, 1824. 



This species is nothing but the Podocnemis sextuherculata Cornalia and 

 the Bartlettia pitipii Gray, and the name Podocnemis amazonica has to be 

 used therefor. The skull shows so considerable difterenccs from the other 

 species, of Podocnemis that it seems justified to accept Gray's generic 

 term Bartlettia for this form. 



The type specimen has six neuralia ; in the specimen figured by Bou- 

 lenger seven are present. 



I have to state here that these facts were fully brought out already by 

 the late Prof v. Siebuld. The labels written by him give Spix's original 

 names and Troschel's and Gray's names are added respectively. 



I am greatly indebted to Prof R. Hertwig for the permittance to exam- 

 ine these interesting types and to Inspector Will for assistance given 

 during the examination. 



JMuxchen, August 1, 1892. 



III. The Genera of the Trionyciiid.e. 



The generic name Trionyx was established by E. GeoftVoy St. Hilaire 

 in 1809* (or 1808 f). Schweigger :j; had introduced the name Amydam a 

 MS. handed to the French Instilut in 1809. 



Geoflroy mentions the following species : 



Trionyx subj^lanus Geoftr. 



" mgyptiacus Geoffr., Testudo triunguis Forskal. 

 " stellatus Geoffr., Testudo cartilaginea Boddaert. 

 " cariiiatus Geoffr., one of the American species. 



*Geoffroy St. Hilaire, E., " Memoire sur les Tortues molles, iiouveau genre sous le noiu 

 de Trionyx et sur la formation ties Carapaces," Ann. Mas. Paris, xiv, 1S09, pp. 1-20, 1^1. 1-5 



tGeoftroy St. Hilaire, E., "Sur les tortues molles," Paris Hoc. Phil. Bull., i, 1808, pp, 

 833-367 (not seen). 



I Schweigger, " Prodromus monographise Chelouiorum," KiJnigsbergcr Archiv. fiir 

 Katurw. and Math., Bd. i, Kouigsberg, 1812, pp. 271,^272. 



