436 NEW SPECIES OF LIPARUS FROM WEST AUSTRALIA. 



round the lower part of the body whorl their impressed character 

 is not so marked. The longitudinal arcuate riblets being cut 

 across by the spiral grooves, the surface is divided into coarse and 

 fine imbricating subsquainose nodosities, causing the surface to 

 resemble bead-like rows, with finer longitudinal beaded rows in 

 between the coarser ones. 



Aperture slightly oblique, pyriform; outer lip simple, neither 

 thickened nor reflected, meeting the body whorl at a sharp angle, 

 then slightly bent and regularly curving to the anterior extremity, 

 where[^it is ajlittle produced and almost effuse. Columella nearly 

 straight, anteriorly everted over the rimate umbilicus; above 

 spreading a thick and sharpl}^ defined layer of callus on the body 

 whorl. 



Length;30mm. Width about the middle of the body whorl 

 10 mm. 



//«&. — About 50 miles east of Israelite Ba}^ Western Australia, 

 two miles from the edge of the clifis, which are there about 200 

 feet high; it was found in large numbers. Bulimias Dux is also 

 found abundantly there. 



The nearest ally of this species is Liparus Brazieri, Angas, a 

 broader, shorter and much thinner shell. The surface of L. 

 gratwicki is correlated with a sharper, harsher sculpture. 



The nepionic apex to which I have drawn attention is the same 

 in all other members of Liparns, although, except in the case of 

 L. Spenceri, it has received little attention from authors. 



I have placed this species in with Lijmrus, although so far 

 nothing is known of the anatomy of the animal, but its general 

 characters and habitat suggest that it should be so placed; it has 

 characters, however, as to shape, the formation of its aperture with 

 its thick callused internal surface, that would place it with 

 Placostylus. 



The drawing of this species has been generously made for me 

 by Mr. Charles Hedle}^, Conchologist on the scientific staff of 

 the Australian Museum. 



