126 PERCY SLADEN TRUST EXPEDITION. 



397. Ostrea mytiloides. Lam. 

 Loc. Coetivy IsJand. 



Not apparently adult, but in many ways agreeing nitli the species named above. 

 A few specimens. 



398. Ostrea {Alectryonia) crista-galli,'L. 



Loc. Cargados Carajos : Stations B 17, 30 fathoms, B 24, 30 fathoms. 



399. Ostrea (Aiectri/otiia) frons, Jj. 

 Log. Cargados Carajos, 30 fathoms. 



Saya de Mallia Banks : Station C 15, 55 fathoms. 

 Seychelles : Station P 2, 31 fathoms. 

 Many of the Ostreidse are hardly in a condition to bo differentiated with any 

 certainty. 



Family PectinidSB. 



400. Pec ten c tine o Ins, Eeeve. 



Loc. Saya de Malha Banks : Station C 19, 29 fathoms, among corals, rubbles, 

 and Alffce. 



401. Pecten irregularis, Sowb. 



Loc. Chagos Archipelago : Salomon Reef. 



402. Pecten lemniscatns, Reeve. 



Loc. Chagos Archipelago: Salomon Lagoon, 10-14 fatboras. 



403. Pecten lividus. Lam. [= serratus, Reeve.] 



Loc. Amirantes : Stations E 2, 29 fathoms, weedy ground ; E 5, 25 fathoms, sandy. 

 A very variable species. None of these last three found in good condition, being 

 much encrusted with nullipores, &c. 



404. Pecten maldivensis, Sm. 



Pecten maldivensis, Edgar A. Smith, Pauu. & Geogr. Maid. & Laccad. Arch. ii. p. 022, pi. 3G. 

 figs. 19, 20. 



Loc. Saya de Malha Banks : Station C 15, 55 fathoms. 



Amirantes : Station E 21, 30 fathoms, nalimeda-xuhhlc. 



Described but three years ago from the Maldives [J. Stanley Oardiner), this pretty 

 and peculiar species has been since recorded from the Persian Gulf {F. W. Townsend), 

 and now a further extension of range is supplied. 



405. Pecten noduliferus, Sowb. 



Loc. Amirantes : Stations E 2, 29 fathoms, rubble ; E 11, 25-80 fathoms, hard, 

 ground; E 13, 20-23 fathoms, E 16, 39 fathoms, Lithothamnia-ruhhle ; E 21, 

 30 fathoms, Halimeda and weed. 

 Seychelles: SUition E 7, 34 fathoms, sand, with weed. 



