292 MR. G, A. BOULENGER ON THE 



4. MiODON NOTATUS. 



Microsoma notatum Peters, Sitzb. Ges. Nat. Fr. Berl. 1882, 

 p. 127. 



Mioclon notatus Bouleng. t. c. p. 252. 

 Cameroon, Congo. 



15. Elapocalamus. 

 Bouleng. Ann.& Mag. N. H. (8) viii. 1911, p. 371. 



1. Elapocalamus gracilis Bouleng. 1. c. 



Cameroon. 



16. Polemon. 



Jan, Rev. et Mag. Zool. (2) x. 1858, p. 520; Bouleng. Cat. Sn. 

 iii. p. 253. 



Two species : — 



A single postocular ; veiitrals 221-226 P. harthi. 



Two postoculars; veiitrals 174-206 P. hocourti. 



1. PoLEMON BARTHi Jan, 1. c. ; Bouleng. t. c. p. 254. 

 Gold Coast, Ashantee. 



2. PoLEMON BOCOURTi Mocquai-d, Bull. Soc. Philom. (8) ix. 

 1897, p. 13. 



AparallaGtus hagmanni Gough, Zool. Anz. xxv. 1902, p. 646. 

 Cameroon, Frencli Congo. 



17. Aparallactus. 

 A. Smith, 111. Zool. S. Afr., Kept., App. p. 15 ; Bouleng. Cat. 

 Sn. iii. p. 255. 



iS'i/oiojysis of the Species. 



I. Two praifroiitals ; a single labial in contact with the parietal ; ventrals 139-156. 



A. 6th upper labial in contact with the parietal; 2 postoculars. 



Frontal not IJ times as long as broad A. dolloi. 



Frontal IJ times as long as broad A. hatesii. 



B. 5th upper labial in contact with tlie parietal; a single postocular. 



Frontal at least twice as long as broad ' A. wigrocoUaris. 



Frontal hardl}' 1^ times as long as broad A. voucheti. 



II. A single praafrontal ; otli and 6th labials in contact with the parietal ; ventrals 



152-170. 



Scales smooth ; frontal ^ times as long as broad A. lineatns. 



Scales smooth ; frontal Ij times as long as broad A. anomalus. 



Scales keeled on posterior part of body and on tail ; frontal 



1^ times as long as broad A. niger. 



1. Aparallactus dolloi Werner, Yerli. zool.-bot. Ges. Wien, 

 Hi. 1902, p. 346. 



Erench Congo. 



2. Aparallactus batesii Bouleng. Ann. & Mag. N. H. (7) 

 xix. 1907, p. a25. 



Cameroon. 



