Bay of Bengal and the Arabian Sea, 173 



line is higher in proportion to the length. The interior to- 

 wards the outer margin is beautifully pearly. 



30. Amussium Jeffreysii, Smith. 



Anmssium Jeffreiisii, Smith, Lamellibr. ' Challenger ' Exped. p. 310, 

 pi. xxiii. figs. 2~'2x- 



Bah. Off Koukan coast, lat. 15° 29' N., long. 72° 41' E., 

 in 559 fathoms. 



These specimens agree precisely with those obtained by 

 the ' Challenger ' off the Philippine Islands in 375 fathoms. 



31. Amussium caducum, Smith. 



Amusdum cadiicuin, Smith, Lamellibr. 'Challenger' Exped. p. 809, 

 pi. xxiii. figs. 1-1 c. 



Hah. Off delta of the Godaveri River, lat. 16° 01' 00" N., 

 long. 81° 25' 00" E., in 410 fathoms. 



The specimens from this locality correspond in every par- 

 ticular with the types from the China Sea obtained by the 

 * Challenger ' in 700 fathoms^ 



32. Amussium solitarium. (PI, V. figs. 11, 12.) 



Testa subcircularis, pellucido-alba, subnitida ; valva dextra leviter 

 convexa, concentrice regulaiiter striata, sinistra seque convexa, 

 liris tenuibus radiantibus paulo arcuatis instructa, lineisque iucre- 

 menti substriata ; auriculae parv^e, baud radiatim sculptae ; um- 

 bones mediocriter acuti, ad angulum circa 130° convergeutes ; 

 pagina interna nitida, liris undecim in utraque valva instructa. 



Longit. 16 millim., alt. 16, diam, 4. 



Hah. Bay of Bengal, lat. 12" 20' N., long. 85° 8' E., in 

 1803 fathoms. 



Allied to A. Watsoni, but with the radiating liras of the 

 left valve more remote and without distinct cancellation. 

 The internal lir^e are curved, those of A. Watsoni being 

 nearly straight. 



EXPLANATION OF THE PLATES. 



Plate UI. 



Fig. 1. Conus australis. 



Fig. 2. planiliratus. 



Fig. 3. Murex malabaricus. 

 Figs. 4, 5. Pleurotoma congener. 



Fig. 6. (Surcula) suhcorpulenta. 



Figs. 7, 8. ( ) syinhiutes. 



Fig. 9. Latirus andamanicus. 



Ann. & Mag. N. Hist. Ser. 6. Vol. xiv. 13 



