198 ON THE FAMILIES OF THE RANIFORM ANURA. 



RANID^ raihi. 

 For a synopsis of the genera of this extensive family the student is referred to the 

 Essay in Natural History Review above mentioned. 



Staurois acridoides Cope, sp. nov. 



The species of Staurois are the present with S. n a t a t o r Gthr., and S. g u 1 1 a- 

 t u s Gthr. HyperoliviS plicatus Gthr., referred here by me on a former occasion, 

 pertains to Heteroglossa Hallowell, being the second known species. (Mus. Academy, 

 from Ashantee.) 



This species ranges in size and proportions much as Acris g r y 1 1 u s of North 

 America. Palmation of foot not full, leaving three phalanges of the fourth toe free ; 

 terminal dilatations small. Sole with two small tubercles, a thii'd tubercle below its 

 middle on the inner side. Profile of front convex ; canthus rostralis obtuse, straight ; 

 muzzle narrowed, rounded, slightly prominent. Diameter bony orbit equal from same 

 to end muzzle ; nostril behind end muzzle. Membranum tympani half orbit ; eusta- 

 chian tubes larger than the very small choanas. Heel to middle orbit. Skin with 

 weak tubercles above, and two plicEe convergent from orbits, then divergent and ter- 

 minating behind scapulre. 



Above dark grayish olive, with frequently a narrow vertebral band ; this with the 

 plicas and warts often black margined. A dark band on side, on front and hind face 

 of femur, the latter with a pale one above it. Lip with three broad blackish bars, 

 one from canthus rostralis and orbit, and two below orbit. Throat and breast brown 

 white, punctate ; abdomen white. Limbs cross-barred. 



Length head and body, 13 lin. Length tarsus, 3 lin. 



" hind limb, 19-5 Width cranium behind, 4*5 



" foot, 9 



Habitat. Zanzibar, apparently very abundant ; brought to the Mus. Comp. Zo- 

 ology by C. Cooke, who has explored that region. (Nos. 457, 459.) 



GASTRECHMTA. 



Maxillae edentulous; epicoracoid and clavicle wanting; vertebrae proccB- 

 lian ; sacrum with dilated diapophyses, attached by condyles to 

 simple coccygeal style, ..... Hemisidae. 



EEMISID^. 



Auditory apparatus wanting; tongue posteriorly retractile into a sheath; 

 frontoparietal and prefrontal bones fully developed, in contact, the 

 latter separated to end of muzzle by ossified ethmoid septum ; toes 

 webbed, no cuneiform shovel ; no parotoid glands ; manubrium present, Hemisus. 



