PETERSIUS. s 231 



6. PETERSIUS. 



Hiloond. Sitzb. Gc.-. natiirf. Fr. I^cil. l.S'.»l, p. 172 ; Baulcii;^. Poiss. Bass. Congo, 

 p. IGo (lUOl). 



Characters of Micralesfes, but distinguished liy the absence of tlie 

 pair of conical teeth behind the mandibular series. Vertcbrde 36-37 *. 

 Tropical Africa. 



Sf/nojms of the Species. 



I. Anterior jn-ajniaxilltiry teeth aUcrnalin^ wilh the posterior. 



A. D. 10-11 ; A. 19-20. 



1. Sc. 33-40 |5?J. 



a. A. 23-20 ; depth of body 3-j.'j times in total len^^lii. 



01 



Sc. -40 yf ; lower jaw projecting beyond upper . 1. F. niodestus, Blgr., p. 232. 

 Sc. 35-3(3 'j ; lower jaw not projecting bej'ond 



upper 2. P. hihjendorji^ 1^'g'"-' P* -•^-• 



A. A. 19-22. 

 Sc. 33 qf; ; diameter of eye 'iS\ times in length of 



head; depth of body 2f times in total length. 3. P. conseriaUs, Ililg-, p- 233. 

 Sc. 35-36 || ; diameter of eye 2i-2f times in 



length of head ; de})th of body 3J— 4 times 



in total length ^. P. ta)i<jeims, Lilnnb., p. 234. 



2. Sc. 28-31 IJ ; A. 22-24. 



Depth of body 3|-3| times in total length ; 



teeth with very long median cusp ... 5. P. leopoldiamis, Blgr., p. 235. 



Depth of body 3 times in total length .... (5. P. hrumpti, Pellegr., p. 235. 



De[)th of body 2^-2^ times in total length . . 7. P. caudalis, Blgr., p. 23(5. 



3. Sc. 24-26 .^f ; l;it(>ral line ineom[)lete. 



A. 20; depth of body 2§-2f times in total length. 8. P. puh-her, Blgr., p. 237. 

 A. 21-22 ; depth of body 2|-2^ times in total 



length v. I', niajor, Blgr., p. 237. 



B. D. 12 ; A. 14 ; Sc. 28-30 ^ . . . .10. P. .ynlopterus, Blgr., p. 239. 



II. Anterior praemaxillary teeth corresponding to the posterior. 

 Sc. 29-30 ;'|; A. 20-21 ; d.'pth of body 4 limes 



in total length 11. P. woo.^naini, Blgr., p. 230. 



Sc. 24-27 if ; A. 21-24 ; depth of body 3-3^ 



times in total length 12. P. occidentalism Gthr., p. 240. 



* The type of the genus, P. conserialu; dilTers from all its congeners by its large size as 

 well as by the complete closing up of the parietal I'ontauelle. 



