JOURNAl. Ol- CONCllOl.OCV, Vol.. 9, No. 3, jIlV, 1S98. 80 



Lima (Mantellum) angulata Sow.— Several, resembling ex- 

 actly specimens in the British Museum from Tanama. Hay of 

 Caraccas. 



Famuv pectin id.].. 



Amussium japonicum (".m.— Quite typical. A series of adult 

 and young. China, Japan. 



Amussium pleuronectes L.— Typical examples, in all sUigcs 

 of growth. China. 



Pecten asper Sow. — This is one of the most interesting of the 

 recent Pectinidai. 'J'he markings are peculiar, as is the sculpture, 

 and well represented in plate i. of Reeve's Conch, Icon. New 

 Guinea (Hinds). 



Pecten crassicostatus Sow. — Several typical examples. Japan. 



Pecten cristularis Ad. & Rv.— Some pretty specimens. Distri- 

 buted throughout the Indian Ocean. 



Pecten singaporinus Sow.* — Only one, a finely-coloured but 

 small specimen. 



Pecten sinensis Sow. — Several examples, in various stages. 

 China. 



Pecten squamatus Gm. — Typical examples of this inequilateral 

 Philippine Island species. 



Pecten tranquebaricus Lm. — Small but perfect, and highly 

 characteristic, shewing the peculiar acute auricles, and of a pale 

 ochraceous colour. Coasts of Tranquebar. 



Pecten (Chlamys) limatulus Rv. — Three specimens of this 

 delicate and elaborately-sculptured species. Mauritius. 



Family AVICULID^E. 



Avicula argentea Rv.— A smooth, dark olive shell. Also re- 

 ported from the coasts of Guinea. 



Avicula formosa Rv. —Through a lens, this shell, much 

 encrusted as it is with nullipores, etc., is seen to be most delicately 

 concentrically lirate. 



Avicula iridescens Rv.— Two specimens. Moluccas. 



Avicula scabriuscula Rv.— Two ; characteristic. Australia. 



Margaritifera anomoides Rv.— Many ; a decided species, 

 semitransparent, white, rayed with pale green in a manner very 

 unusual in this genus. Philippines. 



Margaritifera margaritifera L.— Medium and juvenile ex- 

 amples of this abundant tro[)ical species. 



Margaritifera praetexta Rv.— Many ; of a peculiar livid fawn 

 colour, the pale oblong blotches with which the shell is rayed are 

 curiously wrinkled across with opaque-white lines. Philippines. 



