122 PERCY SLADEN TEUST EXPEDITION. 



368. Area {Barbatia) nivea, Chemn. 



Log. Cargados Carajos: Stations B 9, 30 fathoms, broken sliuU and coral lump- 

 bottom ; B 20, 28 fathoms, on coarse coral-rubble. 

 Providence I. : Station D 3, 29 fathoms, coral-rock. 

 Amii'antes : Stations E 1, 29 fathoms, E 2, 29 fathoms, rubble ; E 5 32 fathoms, 



sandy ; E 16, 39 fathoms, on Lithothanmia-Ynh\Ai\ 

 Chagos Archipelago : Salomon Lagoon, 10-14 fathoms (var. helblingi) ; Diego 

 Garcia, Barachois Maurice, also Diego Lagoon, 14 fathoms. 

 Evidently a very abundant and variable form, of which many examples in all stages 

 of growth were secured. I cannot separate the large BarhcUki helhUmjl (Brug.) from 

 the typical nivea. It is merged as synonymic by Dr. Edouard Lamy, whose recently 

 published work on the genus * will be found absolutely indispensable to students of this 

 most difficult family. 



369. Area (Aear) plicata, Chemn. 



Area plicata, Cliemu. Couch. -Cab. xi. p. 241, ^\. 204. fig. 2008 (1795). 

 Area domingensis, Lamarck, Anim. saus A'^ert. vi. p. 40 (1819). 

 Area squamosa, Lamarck, Anim. sans Vert. vi. p. 45 (1819). 



Loc. Cargados Carajos: Station B 11, 30-33 fathoms, white sand bottom; B 17, 

 30 fathoms, shell-rubble. 

 Amirantes : Station E 25, 20-44 fathoms, rough coral. 

 A most widely distributed mollusc, i'ound l)otli in the tropics of the Old and New 

 Worlds alike, with a most extensive synonymy, of which only the three principal are 

 given above. 



370. Area [Avar) tenella, Reeve. 

 Loc. Chagos Archipelago. 



A well-marked form, extending on the N.E. to the Philippines, and to Madagascar 

 on the S.W. 



371. Area (Anadara) holoserica, Reeve. 



Loe. Chagos Archipelago : Diego Garcia, Lagoon, 10 fathoms, and Barachois. 



This is the Area urojnffimelaiia of Bory St. Vincent (1824), subsequently toned down 

 to uropi/Qmelaua, which, strictly speaking, has priority of several years over Reeve's 

 better-known cognomen. But it seems a barbaric meaningless name, and such are 

 often rightly disallowed, and accordingly it is not adopted here. 



372. Area {Anadara) seeticostata, Reeve. 



Area scaphu, Lamarck (in parte), Anim. sans Vert. vi. p. 42 (1819). 

 Area seeticostata, Reeve, Conch. Icon. ii. Area, pi. 6. lig. 38 (1844). 



* " Eevisiou des Area vivants du Museum d'Histoire Naturclle de Paris,"' par E. Lamy, Journ. de Conch, vol. Iv. 

 (1907) pp. 1-111, 199-307, tabb. 1, 3. 



