112 HORN EXPEDITION — PALiEONTOLOGY. 



Loc. — In limostonp, camp at Lanrip's Creole, north of Tempe Vale, Mereenie 

 Bluff, and Petennann Creek. 



Asaphus howchini, Eth., fils. 

 Ref.-yx., p. 23, t. 3, fig. 1. 



A thoracic somite (the axi.s of which i.s wider than the pleuiw), evidently 

 belonging to this species, has a total length of 80 nun., tlius indicating a size equal 

 to that of A. tryaniius. 



Loc. — In limestone, camp at Laurie's Creek and north of Tempe Vale. 



Asaphus lissopeltis, sp. nov. (Plate 3, Figs. 24, 25, 26.) 



Sp. char. — Tail rather more than a semicircle, smooth, with a depressed 

 border. The axis is very distinct, tapers rapidly, and gradually becomes obsolete 

 just within the depressed border ; the uppei- one-third is faintly annulated. The 

 sides in the upper one-third have four faint ribs, the rest of the surface is smooth. 

 Greatest width, 48 mm. ; axial length, 32 mm. 



I figure a glabellum that may belong to this species, which differs from that 

 of A. illaroisis by the somewhat semicircular track of the facial suture. In asso- 

 ciation with it is a cheek-piece, which differs by its long attenuated backward 

 extension. 



Loc. — In limestone, camp at Laurie's Creek and Petermann Creek. 



Obs. — This pygidium approaches that of A. ilhxrensis in shape, but differs, 

 inter alia, by the obsolete segmentation. 



Hypostomes of Asaphus, spp. (Plate III., Figs. 22, 23.) 



The hypostome figured and described by Mr. Etheridge, vi., p. 23, t. 3, fig. 2, 

 has been redrawn (Fig. 23), after freeing the anterior part from its CDvering matrix; 

 it now presents a very different appearance in its anterior margin, which is exces- 

 sively prolonged and wii>g(Hl. Judging from the matrix, the specimen came from 

 the limestone on Laurie's Creek, and in all probability belongs to Asaphus howchi/u'. 



Another labrum (Fig. 22) represents a different type; it was obtained at Middle 

 Valley, Tempe Downs, and may have belonged to Asaphus i//are?isis. 



