40 AMPHINEURA. \Polyplucophora 



Hob. Cook Strait. The type was collected by Strange in Port 

 Jackson, N.S.W. 



Remarks. There are two specimens from Kapiti Island in the 

 Dominion Museum, and these are the only examples known to have 

 been found in New Zealand waters. 



10. Chiton Stangeri, Reeve, 1847. Plate 2, fig. 19 ; Plate 4, fig. 13. 



Chiton Stangeri, Reeve, Conch. Icon., pi. 22, f. 150 ; P. Mai. S., ii, 196. 

 Not 0. canaliculatus, Q. & G., as suggested by Hutton, Man. Conch. (1). 

 xiv, 177. 



Shell small, ovate-oblong, elevated, sculpture rather coarse, whitish 

 with green. Anterior valve with about 20 radiate nodulous ribs, apex 

 smooth, microscopically shagreened, sinuated. Intermediate valves 

 sharply angled, side slopes straight ; central areas with the jugum 

 smooth and shining, minutely shagreened ; sides with 6 to 8 longi- 

 tudinal grooves on each side, very narrow near the middle, broader 

 toward the margins, ribs broad and smooth ; lateral areas with 3 to 4 

 broad radiate ribs, cut up by regular growth-lines into squarish nodules. 

 Posterior valve with about 20 nodulous riblets, central area smooth, 

 a few grooves on each side ; mucro in front of the middle, pointed, 

 posterior slope concave. Girdle with imbricating, rounded, and con- 

 vex scales, largest in the median rows, microscopically faintly striated. 

 Colour yellowish-white, tesselated with green and grey spots ; girdle 

 banded with light blue, green, and white. Interior greyish-blue ; 

 sinus narrow, denticulate ; sutural lamina? broadly rounded, white. 



Length, 13 mm. ; breadth, 8 mm. Divergence, 120. 



Type in the British Museum. 



Hob. The type was collected in New Zealand by Dr. Stanger, 

 exact locality not stated. Lyttelton Harbour (H. S., T. Iredale) ; 

 Hauraki Gulf (H. S.) ; Bay of Islands (J. C. Anderson). 



Remark. This is one of our very rare species. 



Genus 2.jjEuDOXOCHiTON, Shuttleworth, 1853. 



Eudoxochiton. Shuttleworth, Berner Mittheilungen, 1853, 67. Type : 

 Acanthopleura nobilis, Gray. Acanthopleura, sect. xxf. Gray, P.Z.S.. 

 1847. 68, not Guilding. Maugeria, sect, f, Gray, Guide, 1857. 184. 

 Chcetoplenra, Adams et al., not Shuttleworth. 



Valves entirely exposed, smoothish, lacking eyes ; mucro flat, 

 the sutural plates broad and connected across the sinus ; insertion 

 plates of all valves blunt, closely and deeply cleft ; the median valves 

 with 3 or 4, end valves with many, short slits. Girdle leathery, setose. 

 Gills extending the entire length of the foot. 



The valves, when eroded, are seen under the lens to be densely,, 

 evenly, and regularly punctured all over. The interior is white, and 

 of a dense porcellanous texture. The laciniated insertion plates, cut 

 into many short teeth, combined with the harshly setose girdle and 

 continuous sutural plates, are the most striking generic characters. 

 (Pilsbry.) 



