MoUusca.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 43 



Fam. PHILOBRYIDAK, Bernard, 

 (jenus Philobrya. P. Carpenter. 1872. 

 DiMrihntwn. — Cosmopolitan. 

 Animal carnivorous. 



Philobrya costata (Bernard), iS'Mi. 

 H()ch.'<fetfcn'(t cosfafd. Bernard, lUill. d. Nat. du Mus., ISlKi. I'/iiioljij/ti cos/a/K. Bt rnard, 

 J. de Coneh., xlv, iSitT, ]). 1."). pi. i. tijj;. .l ; j). 3.3, ti,u'. 7 in text. 



Shell very small, thick, convex, very inecpiilateral, outlines subquadranj^ular. 

 Prodissoconch very prominent. Ligament internal. Teeth oblique behind, short 

 in front. Surface with strong serrate radial ribs, about 9-10. 



Diameter ant.-post., 2-5 mm. ; diameter dorso-ventral, .3-2 mm. Diameter, 

 2-2 mm. 



Hah. — Ten miles north of Kndt'rbv Island, in 85 fathoms (E. R. Waite). 



Also along the coasts of New Zealand, from the littoral to tlie (•(iralline zmie. 



The Pliocene P. trigono-psis, Hutton, is nearly allied. 



Fam. MYTILIDAE, d'Orbigny. 

 (ienus Mytilus, linne. 1758. 

 Distribution. — World-wide, the maximum of the species in the Arctic and Ant- 

 arctic Seas. 



Mytilus edulis, Linne, 1758. 



Mijtilus edulm. Linne, Syst. Na,t., ed. 10, 1758, p. 705. 



Hah. — Auckland and Campbell Islands. 



Throughout New Zealand, Kerguelen, Patagonia, and Falkland Islands ; 

 abundant in European seas. 



Mytilus magellanicus, Lamarck, 183<i. 

 M//tihts m<ujeUa)iicus, Lamarck, A.s.V., ed. 2, vii, 1830, p. 37. M. polijdontes, Quoy 

 and Gaimard : Gray in Dieff. N.Z., ii, p. 259 (non Quoy and Gaimard). 

 M. crenatus, Lamarck: Krauss, Siidafrik. Moll., 1848, p. 24 (non Lamarck). 

 M. capensis, Dunker : Menke, Zeitschr. f. Malak., 1846, p. 108. 

 Hah. — Auckland Islands ; Camjibell Island (Professor Chilton). 

 North and South Islands of New Zealand, Chatham Islands, and Fiji. 

 The species is cinaimaustral. 



(Jcnus Modiolus, Lamarck, 1799. 

 Disti'ihution. — World-wide. 



Modiolus australis, (iray, 1827. 

 Modiola australis. (h-ay, App. King's \'oy., ii, 1827, p. 477. Mijtilus {Mndinla) 

 arcolatas, (iould, P. Bost. S.N.H."^, iii, 18.50, p. 343: U.S. Expl. Exp.. .\ii, 

 }). 452, atlas fig. 562. Modiola alhicostata. Lamarck: Hutton, C.M.M., 

 p. 78 (non Lamarck). 



