108 POLYPLACOPHORA. 



posterior margins straight, produced into an acute central point; 

 lateral areas imli.-tinet, the whole surface rather coarsely granular, 

 the granule- smaller on the back. Length '45, breadth '2 inch. 

 Color pink, getting yellowish on the back. (JIutton.) 



Cook Strait; Foveaux Straits (H. Filhol.) New /</<!. 

 Toniri-i ruhiginosa Hi TTON, Trans. N. Z. Inst. iv, p. 180 (1872) ; 

 Man. N. Z. M<.11., p. 114. Chiton rubiginosus SWAINSON in coll. 



AcANTiioi'i.i i i: \ (MMi-i. i:\.v Hutton. Oval; margin broad, 

 velvety, with long spines scattered over it; valves depressed, flat- 

 tened on each side, subcarinate ; posterior margins not covering the 

 next at the corners, rather convex, and pointed in the center; ante- 

 rior valve with radiating moniliform ridges; lateral areas of inter- 

 mediate plates granulose with two prominent, radiating, slightly 

 curved ridges on each side; median areas with finely granular trans- 

 verse waved lines, which pass imperceptibly into the larger lateral 

 granulations; posterior valve small, like the intermediate ones; 

 centers of valves punctate internally. Length, 1 inch ; breadth *5 

 inch. (Ifnfton). 



Color: margin reddish-brown, varied with darker; valves grey- 

 ish, more or less varied with yellowish-white, yellow, or brown. 

 (Hutton.) 



Habtt'tt unknown. 



Acanthopleura complexa HUTTOX, Trans. New Zealand Institute 

 iv, p. 181 (1872). 



Ilutton gives as synonyms " Chiton aculeatus Quoy and ( Jaim.,wec 



Linn., nn- Harries. Acanthopleura ucu/t'alus Gray, DiefK N. /., vol. 



ii, p. 245"; and in his Manual of N. Z. Moll., 1880, he places <-n- 



' in the synonymy ufMojmlin ri/itita. It is obvious that the first 



references are incorrect, Quoy's aculcntns being merely a form of 



t!i'ij,/i'nni .tjttiiit/fi'ii, with which species Hutton's de-ci iptmn 



can in no way be made to agree. Whether cnnijilr.rn is astray - 



imen <>\' M,j,t/it i an ex. -1 naively Xorth Pacifi-- genus) can only be 



decided by an examination of the type. Von Martens has so 



affirmed (ZooL Rec, \. p. 151). 



9. West Indian species. 



L PIDOPLEURU8 OORBO0U8 Rochebr. Shell ovate, snbcarinated ; 

 ashen, covered with minute black point-. Anterior valve, p<>.-t rior 

 area of posterior valve and lateral areas of intermediate valves cor- 



