194 MACEOSCHISMA. 



ornamented with concentric brown rings, cancellated with elevated 

 and concentric lines; pale around the foramen; posterior extremity 

 much elevated ; foramen large, cusp-shaped, dilated posteriorly. 



Cagayan, Philippine Is. 

 M. cuspidata Ad. P. Z. S. 1850, p. 202.— Sowb. Thes., p. 106, 

 f. 226. 



M. producta A. Adams. PI. 59, rig. 62. 



Shell narrowly oblong, back elevated, convex, white, variegated 

 with pale brown ; obsoletely decussated with elevated lines and con- 

 centric strise ; anteriorly narrow, produced, sides planulate, posterior 

 extremity rounded, elevated ; margin deeply sinuated ; foramen 

 very long, triangular, posteriorly dilated. (Ad.) 



Port Lincoln, S. Australia, deep water. 



M. producta Ad. P. Z. 8. 1850, p. 202.— Sowb., Thes., p. 205, f. 

 224.— Angas, Moll. Fauna S. Austr., in P. Z. S. 1865, p. 185. 



M. angustata A. Adams. PI. 59, figs. 61. 



Shell narrow, oblong, back elevated, rounded, white, painted and 

 tessellated with brown lines and reddish-brown spots ; sculptured 

 with obtuse, subrugose riblets and depressed, subdistant concentric 

 lines ; posterior extremity elevated, margin sinuated ; foramen large, 

 elongated, subtriangular, posteriorly dilated, excavated. (Ad.) 



Habitat unknown. 



M. angustata Ad. P. Z. S. 1850, p. 203.— Sowb. Thes., p. 205, f. 

 225. 



M. bakiei (A. Adams) Sowb. PL 59, fig. 65. 



Shell oblong, subquadrate ; anterior margin elevated, reflexed, 

 sides "anteriorly depressed ; posterior margin depressed, subtruncate; 

 having rounded, subnodulous ribs, alternately larger in front ; white, 

 ornamented with radiating bands varied with brown lines at the 

 sides and between the ribs of the posterior portion. Foramen at 

 the posterior margin. (Soivb.) 



Habitat unknown. 



M. Bakiei A. Ad., (where ?) Sowb. Thes. Conch., iii, p. 206, f. 221. 



M. noy.exaledoni^e Sowerby Jr. PL 59, fig. 55. 



Shell oval, grayish-red, minutely punctate, radiated with minute 

 riblets larger posteriorly ; anterior margin elevated, posterior mar- 

 gin subdepressed, scarcely acuminate ; foramen rather short, situated 



