M0LLU8CA — HEDLBY. -"503 



tlie left vahc. Tliis liistory dispi'ovc^s the sufj:j:;osti<)ii* tliat the 

 Trigonla ]\\\vj^v is a contraction of an originally taxodont 

 dentition. 



Numerous separate valves occurred oft' Port Keiiibla in G3-75 

 fathoms, and oil" Cape Three Points in 41-50 fathoms. 



Fcmiihi PECTIN I D^. 



PEC TEN, Mueiler. 

 PECTEN MEDIUS, Lamarck. 



Pecten medius, Lamarck, Anim. s. vert., vi., 1, 1819, p. 163. 



Pecten laticostatus, Gray in Yate, Account of New Zealand, 

 1835, p. 310 [not P. laticostatns, Lamk., Anim. s. vert., 

 vi., 1819, p. 179]. 



Pecten fascus (Klein), Sowerby, Thes. Conch., i., 1842, p. 47, 

 pi. xvi., f. 118, 119. 



Pecten hifidus, Menke, Spm. Moll. Nov. Holl., 1843, p. 35; Id., 

 Philippi, Abb. Bescr., i., 1844, p, 202, pi. ii., f. 6 [not P. 

 bijidus (Munster), Goldfuss, Petr. Germ., 1826, p. 65, 

 pi. xcvii., f. 10]. 



Pecten J umatus, Reeve, Conch. Icon., 1852, pi. vii., f. 32 ; Id., 

 Smith, Chall. Rep., Zool., xiii., 1885, p. 307. 



Pecten novce-zelandice, Reeve, op. cit., pi. vii., f. 36. 



Pecten modestus, Reeve, oj). cil., pi. xi., f.-41. 



Pecten Jilosus, Reeve, op. cil., f. 42. 



Pecten m.eridionalis, Tate, Proc. Roy. Soc. Tas. for 1886 (1887), 

 p. 115. 



? Pecten concavum, Perry, Conchology, 1811, pi. iv., f. 1. 



1 Pecten excavatus. Anton, Verzeich., x., 1839, p. 19; Id., Philippi, 

 Abbild. Besch., i., 1844, p. 201, pi. ii., f. 1. 



Station 55. 



This nomenclature for the common Australian Scallop has not 

 l)een previously recognised. Tlie inquir}^ into its right to usage 

 "turns on two points — whether the Australian species is identical 

 with that from New Zealand, and what is the proper name for 

 the latter. 



* Fischer — Joiirn. de Conch., xxxii., 1884, p. 117. 



