HELIX-MAORIANA. 87 



Section MAORIANA Suter. 



Strobila BUTTON, Trans. K Z. Inst. xvi, p. 195, 1884, not Stro- 

 bila MORSE. Huttonella SUTER, Trans. N. Z. Inst. xxii, p. 224, 

 1889, not Huttonella Pfr. Maoriana SUTER, 1. c. xxiii, p. 96, 

 1890. 



A single species of this interesting group of Endodontoid snails was 

 known at the time Mr. Tryon published the account of Strobila in 

 the MANUAL, and that species was unfigured. I am indebted to 

 Mr. Suter for specimens of several species and figures of the others. 

 Either " Maoria " or " Maorina " would have been better names, 

 the termination used by Mr. Suter having an objectionable adjective 

 form. 



The group is not of generic value, as New Zealand authors have 

 supposed. It is simply a moderately well defined section of Endo- 

 donta. 



P. LEIODA Button. PL 24, figs. 32, 33, 34, 35. 



Shell minute, subdiscoidal, umbilicated, ribbed ; color horny with 

 longitudinal bands of pale rufous. Spire almost flat, but very 

 slightly convex ; whorls five, very slowly increasing, rounded, with 

 numerous oblique narrow ribs, about thirty in the tenth of an inch, 

 the interstices finely striated with growth-lines; suture impressed ; 

 umbilicus rather narrow, about one-sixth the diameter of the shell, 

 nearly cylindrical, margined with brown ; aperture vertical, rather 

 narrow, lunate ; peristome simple, thin, the right lip at first ascend- 

 ing, then descending and sweeping forward, leaving a shallow pos- 

 terior sinus, afterwards regularly arched, columellar margin shortly 

 ascending, rather straight, and slightly reflected over the umbilicus ; 

 interior of the aperture strengthened with seven spiral plaits on 

 the body-whorl, and another, rather distant, on the columella; 

 parietal wall with ten spiral plaits. 



Greatest diameter 0'08, least O07 ; height (r05. 



Animal. Body elongated, narrow ; eye peduncles long and thick, 

 tentacles moderate ; mantle subcentral, rather anterior, enclosed ; 

 foot very long and narrow, with neither locomotive disc nor caudal 

 gland. Color pale grey, eye peduncles and a stripe on each side of 

 the head purplish ; foot pale brown. Dentition, 12-1-12. (Hutt.} 



Greymouth, South /., New Zealand. 



Strobila leiodus HUTTON, Trans. N. Z. Inst. xv, 1882, p. 135. 

 8. leioda HUTTON, I. c. xvi, p. 166, 195, t. 9, f. p (dentition.) 



