KEPORT ON THE POLYPLACOPHORA 23 



Lophyrus concentricus, Angas, Proc. Zool. Soc. Lond., 1867, p. 221, No. 228. 



„ jugosus, Angas, Proc. Zool. Soc. Lond., 1867, p. 222, No. 231. 

 Chiton jugosus, E. A. Smith, Rep. Zool. Collect. " Alert," 1884, p. 78. 



Port Jackson, Sydney. 6 to 15 fathoms. 



This species was independently described by Gould and Reeve about the same time. 

 Angas distinguishes Chiton jugosus as having the terminal valves smooth, whereas they 

 are concentrically grooved in Chiton concentricus, but this distinction does not appear to 

 be of sufficient importance to separate the two forms. The two Challenger specimens have 

 the terminal valves smooth, or, at most, with lines of growth, but the concentric lines on 

 the valves are very deceptive. Angas found specimens of the latter at Watson's Bay with 

 "the second valve sometimes blood-colour or scarlet;" one of the Challenger specimens 

 has this peculiarity. The specimens Angas identified as Lophyrus jugosus, with smooth 

 terminal valves, occurred at Camp Cove. Both were found at very low tides. 



All the localities are from New South Wales, as Smith says, " Confirmation of the 

 New Zealand locality (Reeve) of this species is still wanting." 



D. — ACANTHOIDEA. 



Genus Acanthopleura (restricted by Carpenter), Guilding. 



Acanthopleura spiniger (Sowerby). 



Chiton aculeatus, Quoy and Gaimard (not of Gmelin V) , Voyage de 1' Astrolabe, Zool., 1834, vol. iii 

 p. 373 ; Atlas, pi. lxxiv. figs. 1-5. 



,, spiniger, Sowerby, Conch. Illust., 1841, p. 1, pi. clxi. fig. 68. 



„ „ Reeve, Conch. Icon., 1847, pi. xiv. fig. 75. 



Maugeria spinigera, Gray, Guide Moll. Brit. Mus., 1857, p. 184. 

 Acanthopleura spinigera, Dall, Proc. U.S. Nat. Mus., 1882, vol. i. p. 80. 



spiniger, E. A. Smith, Zool. Collect. H.M.S. "Alert," 1884, p. 81. 

 Chiton granatw} Reeve, Conch. Icon., 1847, pL v. fig. 24 (Mus. Cum.). 



„ macgillivrayi? A. Adams, Proc. Zool. Soc. Lond., 1855, p. 120. 

 Maugeria owenii, 1 Gray, Guide Moll. Brit. Mus., 1857, p. 184. 

 Acanthopleura glareosa, 1 Carpenter MSS. in Mus. Cum. (Brit. Mus.) 

 Chiton borbonicus (I), 1 Deshayes, Moll, de Reunion, 1863, p. 37, pi. v. figs. 12, 13. 



„ piceus^), 1 Reeve (non Gmelin), Conch. Icon., 1847, pi. xiii. fig. 70. 

 = „ obesus, 1 Shuttleworth, Bern Mittheil., 1853, p. 79. 



„ cunninghamii (I), 1 Reeve, Conch. Icon., 1847, pi. xxvii. fig. 181 (Mus. Cum.). 



Habitat— Station 187. September 9, 1874. Lat. 10° 36' S., long. 141° 55' E. 

 Albany Island, Cape York, North Australia. 6 fathoms. Coral mud. 



Philippine Islands (Cuming) ; New Guinea, New Ireland (Quoy and Gaimard) ; Port 

 Essington (Jukes) ;. Port Molle and Clairemont and Bird Island (Coppinger) ; New Zea- 

 land and Tongatabou, Friendly Islands (Quoy and Gaimard) ; Fiji (for Acanthopleura 

 macgillivrayi) ; New Zealand (for Acanthopleura glareosa). 



1 These synonyms are given on the authority of Mr E. A. Smith, loc. cit. 



