REPORT ON THE LAMELLIBRANCHIATA. 259 



Area navicular U, Bruguiere. 



Area navicularis, Bruguiere, Ency. M^th., Vers., vol. i. p. 99, No. 4. 

 Area navicular^!, Philippi, Abbild., vol. ii. p. 210, pi. iii. fig. 2. 

 Area navieularis, Eeeve, Conch. Icon., vol. ii. pi. xi. fig. 70. 

 Area luwieulariii, Wood, lud. Test., pi. ix. fig. 5. 

 Var. = Area linter, Jonas, Philii)pi, op. cit., p. 209, tig. 1. 

 Var. = Area subquadrangida, Dunker, Philippi, op. cit., p. 210, fig. 3. 



Var. = Area cumingii, Dvmker (MS. in Coll. Cuming), H. and A. Adams, Gen. Eec. Moll., vol. iL 

 p. .')33. 



Habitat. — Cape York, North Australia, in .3 to 12 fathoms. 



This species is also known as an inhabitant of the coast of Queensland, and has been 

 recorded from China and Amboina. 



It is subject to miieh variation in form and in the amount of ligament in the 

 dorsal area. 



Area imbricata, Bruguiere. 



Area iwhrieata, Bruguiere, Ency. Meth., Vers., vol. i. p. 98, No. 3. 



Area imbricata, Eeeve, Conch. Icon., vol. ii. pi. xi. fig. 73. 



Area wnbonata, Lamarck, Anim. sans, vert., ed. 2, vol. vi. p. 462, No. 5. 



Area wnbonata, Philippi, Abbild., vol. iii. p. 28, pi. iv. fig. 3. 



Area euneiita, Eeeve, Conch. Icon., vol. ii. pi. xiii. fig. 87 (altered to Area cunealis in the 



Index). 

 Area h-aussi, Philippi, op. cit., p. 88, pi. v. figs. 8-10. 



Habitat. — Station 187, near Cape York, North Australia; and Station 113a, off 

 Fernando Noronba, in 25 fathoms. 



There should be, one would think, and perhaps in reality there is, a difference 

 between the West Indian and Australian shells which appear to belong to this species, 

 but at present I am unable to discover it. 



Area tetragona, Poli. 



Area tetragona, Poli, Test. Sicil., vol. ii. p. 137, pi. xxv. figs. 12, 13. 



Arcn tetragona, Forbes and Hanley, Brit. Moll., vol. ii. p. 234, pi. slv. figs. 9, 10, and PI. 



P. fig. 1. 

 Area tetragona, Jeffreys, Brit. Couch., vol. ii. p. 180, and vol. v. pi. xxx. figs. 6-6a. 



Habitat. — Station 75', off the Azores, in 450 fathoms. 



This weU-known species has pi'cviously been recorded from the Azores and other 

 parts of the Atlantic. 



