On the Spiny Mice of British East Africa. 485 



2. Frontal longer tlian broad ; no azygous chin-shield in contact 

 ■with the sj'mphysial ; ventrals 175-1 94. 

 Symphysial in contact with a pair of chin- 



sliields ; a pneocular bolow the loreal . . A. monticola, Cantor. 

 First lower labial in contact with its fellow 



behind the synipliysial ; no pneocular . . A. vertebralis, Blgr. 



13. Eye separated from the labials by suboculars ; dorsal scales 

 feebly keeled ; first lower labial in contact with its fellow be- 

 hind the syniphysial ; ventrals 155. A. stanleyi, Blj^r. 



II. Loreal separated from the eye by one or twoprseoculars ; eye sepa- 

 rated from the labials by suboculars. 



A. Pr.'cfrontal entering: the eye. 



1. Ventrals 195-i'15; subcaudals 9G-113 ; dorcal scales feebly 



keeled. 



A'ertebral scales unicarinate ; eye sun-ounded 

 by four shields ; a single anterior tem- 

 poral A. hamptonii, IJlgr. 



W'rtebral scales bicarinate ; eye surrounded 

 by eight or nine shields; three super- 

 posed anterior temporals A. iiucha/is, Blgr. 



2. Ventrals 136-1G4 ; subcaudals 31-53, 



a. Dorsal scales feebly keeled. 

 Frontal as long as the suture between the 



parietals A. macularim, Theob.* 



Frontal shorter than the suture between the 



parietals A. nnderso7iii, Blgr. 



b. Dorsal scales smooth A. moellendorffi, Boettg. 



B. Prsefrontal excluded from the eye. 



Dorsal scales smooth ; ventrals 138 A. marr/aritophorus, Jan. 



Dorsal scales feebly keeled ; ventrals 161-183. A. cariuatiis, Boie. 



LXIII. — On the Spiny Mice of British East Africa, loith a 

 Description of a new Species Jrom Magadi. By GuY 

 DOLLMAN. 



(Published by permission of the Trustees of the British Museum.) 



In the collection of mammals recently presented to tiie 

 British Museum by A. Biayiiey Percival, Esq., is a series 

 ot" (Spiny Mice from Magadi, South Masailand District, 



* A. modesius, Theob., is iusufiiciently characterized, and mav be 

 identical with this species. 



