Chiton.] AMPHINEURA. 39 



having 17 to 24 subequal riblets reaching to the apex, and broken up 

 by concentric growth-lines into roundish granules ; sometimes a few 

 riblets are interspersed which do not extend to the apex ; the latter 

 is smooth, and slightly sinuate. Intermediate valves with the jugum 

 smooth, slightly beaked ; central areas with 20 to 25 longitudinal 

 furrows on each side, narrower and less deep near the centre, but 

 usually widening and deepening toward the margins ; sometimes they 

 are in breadth equal to the riblets, but in some specimens they are 

 narrower ; they extend the whole length of the areas. Lateral areas 

 distinctly raised, with 3 to 5 strong nodulous ribs, which rarely bi- 

 furcate ; sutures crenulate. Posterior valve with 18 to 20 strongly 

 granose ribs ; central area with longitudinal grooves ; mucro slightly 

 behind the middle, pointed, posterior slope concave. Colour mostly 

 yellowish-olive or dull green with 1 valve blackish-green, rarely 

 brownish-black or brick-red ; girdle of the same colour as the valves, 

 with white or darker bands. Interior bluish-white, pinkish-white in 

 red specimens ; head valve with 9, intermediate valves with 1, and 

 tail valve with 15 slits ; teeth blunt and pectinate ; sinus deep and 

 narrow, denticulate ; sutural laminae white, broad and low, median 

 part of them nearly straight ; valve-callus rather prominent. 



Length, 34mm. ; breadth, 20mm. Divergence, 115. 



Type in my collection. 



Hob. Near Duneclin (A. Hamilton) ; Banks Peninsula (T. Iredale). 



9. Chiton limans, Sykes, 1896. Plate 2, fig. 18. 



Chiton limans, Sykes, P. Mai. S., ii, 93; Suter, P. Mai. 8.. ii. 197; Carpenter, 

 MS. C. muricatus, A. Adams, P.Z.S., 1852 (1854), 91, pi. Hi, f. 6; Man. 

 Conch. (1). xiv. 175, pi. 37, f. 12, 13, not Tilesius, 1824. C. sulcatus, 

 Q. & G. : Button, T.N.Z.I., iv, 178, not Q\ioy and Gaimard. 



Shell oval, elevated, the jugum acute ; mucro median, subpro- 

 minent ; olivaceous, maculated with paler ; entire surface minutely 

 punctate. Anterior valve with 8 ribs bearing 3 high round nodules 

 near the margin ; apex smooth, sinuate ; posterior margin strongly 

 denticulate. Intermediate valves with 9 to 14 grooves on each side, 

 jugum smooth ; lateral areas with 2 riblets, sometimes bifurcating or 

 with another intercalated, furnished with strong acute tubercles, in- 

 terstices smooth ; sutures denticulate. Posterior valve with 8 nearly 

 obsolete radiate riblets, central area longitudinally grooved ; mucro 

 median, distinct, posterior slope strongly concave. Girdle with large 

 and small wide, distinctly striated, elevated, acutely pointed scales. 

 Colour olivaceous or greyish, maculated with white; girdle banded 

 with bluish-green and white. Interior: Sinus moderate, with about 

 15 denticles ; anterior valve having 8, central 1, posterior valve 9 slits ; 

 teeth pectinate. 



Length, 23-75 mm. ; breadth, 12-5 mm. Divergence, 100. 



Type in the British Museum. 



