indications of transverse bands on the caudal are a little more distinct. 
Before modified by use the small teeth in the bands on the jaws appear to 
be subtricuspid. The lateral cusps, being less robust than the central, do not 
persist, as in P. vittafa, but in the wearing process assume irregular shapes 
as in Plate V. Fig. 4, or finally such as are shown in Fig. 7 of the same 
plate. The description of the pharyngeal teeth by Duvernoy is given below; 
whether they are equally movable in adults may be determined better from 
fresh specimens. 
THE CYPRINODONTS. 55 
Mi Osek, 2s A. ts Vs OF Fo 2a; 6. 20, 
“P. corpore compresso, capite squamato, supra depresso, lato, ore angusto, linea 
laterali dorso vicina, pinna caudae lata, bifida, ano capiti viciniore. 
“Corpus breve, caput trunco angustius, nudum, obtusum, argenteum, opercula 
levia, nares simplices ante oculos, apertura branchialis labium superius angustius, 
dentium setaceorum series unica ampla, venter ab embryonibus turgidus, pinne 
obtusm, radiate, squame# rotundate, integra. 
“ Habitat in aquis dulcibus Surinami bipollicaris.” 
The above is the original description of Bloch and Schneider. Under 
Peecilia Schneidert Valenciennes has the following : — 
“ Est-ce bien une peecilie que le poisson décrit et figuré par Bloch dans |’édition 
de Schneider sous le nom de Pecilia vivipara? Je n’en suis pas certain; mais ne 
sachant od le placer mieux, je le maintiens provisoirement A la suite du genre. Ila le 
corps comprimé ; la téte couverte d’écailles, plate et large en dessus; la bouche étroite ; 
une rangée de dents petites et fines comme des soies ; la caudale est fourchue. B. 6; 
D.7; A.7; V.6; P. 12; C. 20. Le nombre des rayons branchiostéges et méme 
ceux de la dorsale et de l’anale ne sont pas de nos pecilies. Bloch le colore de jau- 
niitre, avec cing larges bandes transversales brunes. C’est un poisson long de deux 
pouces, qui vit dans les eaux douces de Surinam.” 
The peculiar coloration and the forked tail given this species by Bloch 
in his description and figure would have made it unrecognizable without the 
aid of his type. Happily this was preserved in the Berlin Museum. In 
1864 Peters examined it carefully, compared it with the original figure, and 
published the following remarks : — 
“Ich bemerke hierbei, dass das Originalexemplar von Bloch (No. 3465 unserer 
Sammlung) ganz vortrefflich zu der Abbildung (Systema Ichthyol. Taf. 86) passt, 
welche das Thier von der Bauchseite gesechen darstellt, indem es dieselbe Griisse hat 
und auch der mit Jungen angefiillte Bauch noch in derselben Weise klafft ; auf dem 
Boden des Glases liegen Junge in verschiedener Entwickelung, die eben da abgebildet 
