SUTER : NEW ZEAL.VND POLYrLACOrilORA. 185 



Hutton's types at my disposal, I found that on the glass tablet labelled 

 " Chiton emphurus'''' there were not only two specimens, but also two 

 species. One of them is Hutton's C. empleiirus, but the larger specimen 

 1 foiind to correspond exactly with specimens of C. platessa, from Port 

 Jackson, kindly given me by Dr. J. Cox. There is no doubt that both 

 specimens were obtained from the same locality, and as C. empleurus, 

 known only from the unique type-sj)ecimcn, is very likely a New 

 Zealand species, I include C. iilatesHa in the New Zealand fauna, 

 although it has not been found again by recent collectors. Captain 

 Hutton told me that Captain Fairehild dredged largely, especially 

 in Cook Strait, and that these specimens may have been obtained by 

 him and presented to the Colonial Museum. 



3. Callochiton illitminatus (Eeeve). 



Cltiion illuminatus, Reeve: Couch. Icon., t. xxii, fig. 147 (1847). 

 Cliitun {Cdllueliitoii) illuminatus, lleeve : E. A. Smith, Proc. Zool. 



Soc, 1881, p. 35. 

 Lcpidoplexirus illununatus, lleeve : Pochebrime, Miss. Scient. Capo 



Horn, p. 141. 

 Calluchiton illuminatus, Eeeve: Pilsbry, Man. Couch., ser. I, vol. xiv, 



p. 51, pi. ix, figs. 92-4. 



A small specimen is in the Canterbury Museum, and was kindly 

 submitted to me for examination by Captain Hutton. Since there is 

 only one specimen I was not allowed to separate the valves ; but, so 

 far as examination was possible, I found it to agree perfectly with the 

 description and figures of Callochiton illuminatus in Pilsbry's Man. 

 Conch. The colour is not red, but greenish-grey ; however, the same 

 variability in colour is met with in Cliiton canaliculatus and others. 

 Central areas with eight separate thi'eads on each side ; end valves 

 and lateral areas minutely granulose ; median valves with one slit. 

 Girdle-scales those characteiistic of the genus, rather large. Interior 

 greyish -white ; sinus shallow. Length about 10, breadth 7 mm.; 

 divergence 120°. 



Uab. — Dredged off K;ipiti Island, Cook Strait. 



This is a most interesting addition to the fauna of New Zealand. 



4. Callochiton empleurus (Hutton). 



Chiton eynpleurus, Hutton : Trans. New Zealand lust., vol. iv, p. 178 



(1872). 

 Lepidopleurus empleurus, Hutton: Man. New Zealand Moll., 1880, 



p. 113. 

 Callochiton crocinus, Reeve : Pilsbry, Man. Conch., scr. I, vol. xv, p. 67. 



The elongated form and the deep longitudinal pits along the 

 anterior edge of the lateral areas, distinguish this species at once 

 from C. platessa, with which it has been supposed to be identical. 

 In Hutton's diagnosis the word "sometimes," that precedes "with 

 a row of deep pits, etc.," must be struck out. There are 9-10 pits on 



