Epitonium.] GASTROPODA. 323 



Page 322. Omit- 



"Sect. 3. OPALIA, H and A. Adams, 1853," 

 and the succeeding four lines, and replace it by 



" Sect. 3. CIRSOTREMA, Moerch, 1852. 



Cirsotrema, Moerch. Cat. Yolcli. ]8r,-2. 4,8. Type; ScMlann varicosa. Lara. 

 CaloKcnln.. Tate, 1885. 



"Axial lamellae frequently crisped; spiral threads occasionally 

 very large ; outer lip with a thick crenate marginal varix ' 



Face page 322.] 



w uons iu, reguiariy increasing, witn straignt sides aoove tne Keei, 

 concave between the encircling ribs. Suture deep and channelled, 

 which character is partly hidden by the axial laminae passing over it. 

 Aperture ovate, angled above. Outer and basal lip rounded, slightly 

 effuse, sharp, and with flexuous projections corresponding to the spiral 

 keels. Columella concave, very little callous, terminating in a minute 

 sharp point. 



Diameter, 1-62 mm. ; height, 5-7 mm. 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



Hob. Off Great Barrier Island, in 110 fathoms (type) ; Little 

 Barrier Island, in 20 fathoms (R. H. Shakespear) ; near the Snares, 

 in 50 fathoms (Captain Bollons). Also dredged in 80 fathoms twenty- 

 two miles east of Narrabeen, New South Wales, by Mr. C. Hedley. 



Genus 2. CROSSEA, A. Adams, 1865. 



Crossea, A. Ad., A.M.N.H. (3), xv, 1865, 323. Type : C. miranda, A. Ad. 

 Shell small, umbilicate, conical or turbinate ; whorls convex, re- 

 ticulated, simple or varicose ; aperture rounded, prolonged anteriorly, 

 where it is deeply notched and somewhat canaliculate ; umbilicus 

 bordered by a long, curved, raised rim, which is often crenulated. 

 Distribution. Japan, Australia, Tasmania, and New Zealand. 

 Fossil in the Tertiary of Australia. 



KEY TO SPECIES. 



A. Shell smooth, except a prominent ridge on the base, and a second 



arising from the umbilicus . . . . . . . . glabella. 



B. Shell sculptured. 



a. Surface spirally lirate, a smooth zone above the umbilical rim labiata. 

 aa. Body-whorl with 6 spiral lirae and a faint 7th on the base, 



the interspaces cancellated by axial riblets . . . . cancellata. 



11* 



