A NEW GENUS OF ENGYSTOMATID^ — FRY. 89 



by a groove. Diapophyses of the sacral vertebra much dilated. 

 Coracoid (fig. 35) very strong, much dilated at the symphysis. 

 Clavicle moderately developed, arched, the proximal end 

 expanded and resting on the coracoid ; its distal end tapering and 

 connected with the epicoracoid by a curved band-like procoracoid 

 cartilage. Omosternum absent. Sternum a cartilaginous plate, 

 becoming symmetrically broader and nicked distally. 



Type. — A. robusta, Fry. 



This genus is closely allied to Chaperina, Mocquard, found in 

 Borneo and New Guinea. It differs chiefly in the indistinct or 

 hidden tympanum, the possession of two dermal palatal ridges, 

 the comparative development of the sternal elements, and certain 

 characters in the skull (see Appendix, p. 101). In the present 

 genus (fig. 35) the clavicle is a strongly arched bone resting 

 firmly on the coracoid. The procoracoid is weak and scarcely 

 wider than the clavicle. The coracoid is a very strong unsym- 

 metrical bone with a very wide expansion at the symphysis. The 

 sternum has no forwardly directed processes. In Chaperina 

 (fig. 36) the clavicle is weak and straight and connects with the 

 scapular, not with the coracoid. The procoracoid cartilage is well 

 developed and much broader than the clavicle. The coracoid is 

 moderately developed, nearly symmetrical, and with a much 

 smaller expansion at the symphysis. The sternum has two curved, 

 forwardly directed, lateral processes. 



Three species are recognised which may be distinguished by the 

 following key : — 



A. Snout slightly prominent. 



a. First finger very small. Discs of fingers very 



large A. ornata. 



b. First finger nearly as long as second. Discs 



distinct but scarcely enlarged A. robusta. 



AA. Snout very prominent, longer than the orbital 

 diameter A. gracilipes. 



AUSTROCHAPERINA ROBUSTA, sp. 1IOV. 



(Figs. 35, 35a, 37, Plate viii. ; figs. 2, 2a, 2b, and Plate ix.) 



Habit moderate or stout. Head four-fifths to five-sixths as long 

 as broad, the measurement taken at a line drawn between the 

 hinder margins of the tympana. Snout rounded, very slightly 



