ART. 15 NEW ATJSTEALIAN LAND SHELLS MAESHALL 



body whorl round, its upper edge descending near the aperture. 

 Sculpture of many retractive fine growth striae and a microscopic 

 reticulation. Sutures moderately impressed, emphasized by a crenu- 

 lated edging to each whorl, and by a narrow white margin below 

 which is a reddish narrow band. Umbilicus wide, partly concealed by 

 the reflected columellar lip. Parietal wall glazed. Aperture broad- 

 ly rounded; peristome white, reflected. Color bipartite, the spire 

 light chestnut and the base much darker, rich, glossy chestnut. A 

 distinct white band at the periphery between the two shades of 

 color. Interior showing the exterior colors softened by a glaze. 



The type (Cat. No. 317035, U.S.N.M.) measures: Greater diam- 

 eter, 41 mm. ; lesser diameter, 36 mm. ; height, 32 mm. It and a para- 

 type (Cat. No. 333791, U.S.N.M.) are in the Henderson collection, 

 and came from Lizard Island off east coast of Queensland. This is 

 the species figured by Cox as Helix seinicastanea on Plate 5, Figure 

 10.* His specimen came from Lizard Island. It seems to stand mid- 

 way between Thersites tipartita and T. semicastanea, partaking of 

 the characters of each and yet distinct from both. Cat. No. 317032, 

 U.S.N.M. includes two specimens from Lizard Island of much lighter 

 colors. Cat. No. 317034, U.S.N.M. includes two specimens labeled 

 Islands of northeast coast of Australia. These probably come from 

 Lizard Island. Cat. No. 321080, U.S.N.M. includes one specimen 

 labeled "Australia." This, too, probably came from Lizard Island. 

 Cat. No. 100032, U.S.N.M. labeled " Northeast Australia," from Dr. 

 J. C. Cox, in the Stearns collection, also are so like specimens from 

 Lizard Island that it seems likely they came from that island. 



THERSITES (HADRA) LIZARDENSIS SUIVIA, new subspecies 



Plate 1, fig. 2 



Similar to T. lizardensis lizardensis but larger, more elevated, and 

 differently colored, the spire being fawn color, the base light choco- 

 late with a chestnut tinge, the white line dividing the colors of base 

 and spire very prominent. 



The type (Cat. No. 99944, U.S.N.M.) measures: Greater diameter, 

 48 mm.; lesser diameter, 41.5 mm.; height, 35 mm. It and a para- 

 type (Cat. No. 333792, U.S.N.M.) form part of the Stearns collec- 

 tion. They are labeled ?Borneo. No similar shells have been found 

 in Borneo, and it seems from their resemblance to Lizard Island 

 specimens that they probably came from some island in its imme- 

 diate vicinity, and probably belong to a subspecies of T. lizardensis. 



THERSITES (HADRA) LIZARDENSIS RADA, new subspecies 



Plate 2, fig. 4 



Shell similar to Thersites lizardensis lizardensis but much smaller, 

 more elevated, with the umbilicus largely concealed by the reflected 



* Monogi-aph of Australian Land Shells, 1868. 



