80 PROCEKDINGS OF THE ACADEMY OF [1894. 



These features, in combination with the compact, asbest us-like sutural 

 tufts, readily distinguish the species from other known forms. 



A. asbestoidex was collected by C'oppinger at Port Molle, Queens- 

 land. It is also in the British Museum from Flinder's Island, Bass 

 Strait. This last locality should be confirmed. 



Acanthochites Coxi'> Pilsbry. PI. Ill, figs. 21, 22, 23, 24, 2.5,20; PI. IV, fig. 34. 

 Nautilus VII, p. 119, Frb. 1S94 ( prelimiuiiry (lescripti(iu). 



Shell elongated, the visible portion of the valves occupying 

 less than one-third of the entire breadth of the animal (when 

 preserved in alcohol). Valves grayish, somewhat mottled with 

 olive and fleshy, the dorsal areas dark red or marked with oli- 

 vaceous. Girdle olivaceous. 



Exposed portions of the intermediate valves subtriaugular, slightly 

 elevated, hardly carinated, nearly separated at the sutures by spicu. 

 lose bridges of the girdle. Dorsal areas wedge-shaped, convex, dis- 

 tinctly differentiated from the pleura but not elevated at the sides, 

 sculptured with fine longitudinal stri;ie. Latero-pleural areas having 

 the diagonal rib indicated by a low rounded convexity, and sculptured 

 throughout with convex pustules elongated in a radial direction 

 (fig. 21). Anterior valve having five low I'iblets indicated, each 

 produced at the lower edge in a slight lobe. Posterior valve (PI. 

 Ill, figs. 22-25) having the tegmentum subcircular, a trifle wider 

 than long, the mucro rather elevated and acute, behind the middle. 



Interior rose colored. Anterior valve with the insertion-plate 

 more than half as long as the front slope of tegmentum, pink, with 

 five deep slits; intermediate valves having 1-1 slits, and a ridge 

 running upward from the slits, as though the anterior edge of the 

 posterior tooth projected over the posterior edge of the anterior tooth. 

 Posterior valve having the insertion-plate subvertical behind, and 

 slightly waved up between the two slits; its posterior contour convex. 

 Sutural laminae large, rounded; sinus angular. 



Girdle fleshy, densely clothed with short hyaline spinelets, the 

 tufts being represented by inconspicuous clumps of somewhat longer 

 spines. 



Gills three- fourths the length of the foot. 



Length 23, breadth 13 mm. (alcoholic specimen). 



"Named in honor of Dr. J. C. Cox, of Sydney, N. S. W. 



