REPORT ON THE GASTEROPODA. 457 



Patella tricostata, Deshayes, Encycl. method., vers, vol. ii. (2) p. 152, sp. 3. 



„ tricarinata, Hanley, Ipsa Linn. Conch., pp. 423, 546. 

 Amaihina tricarinata, Brazier, "Chevert" Exped. Shells, Proc. Linn. Soc. New South Wales, 1878, 

 vol. ii. p. 5, No. 25. 

 ,, tricostata, Dunker, Index Moll. Mar. Japon., p. 125. 



Station 233. May 17, 1875. Lat. 34° 39' N., long. 135° 14' E. Kobi, Japan. 

 8 fathoms. Mud. 



Station 186. September 8, 1874. Lat. 10° 30' S., long. 142° 18' E. Wednesday 

 Island, Cape York, North-east Australia. 8 fathoms. Coral mud. 



Station 187. September 9, 1874. Lat. 10° 36' S., long. 141° 55' E. Near Cape 

 York, North-east Australia. 6 fathoms. Coral mud. 



Habitat. — Philippines (Hanley) ; Japan (Dunker). 



2. Amalthea, Schumacher, 1817. 



Schumacher's genus was published in 1817; Defrance published the name Hipponyx in 1819 ; 

 the latter genus being distinguished by the presence of a hoof-shaped shelly plate deposited on the 

 object supplying a home, and to which plate the animal is attached. But it seems unquestionable 

 that this is a feature dependent partly on the object of attachment and partly on the age of the 

 animal (see Fischer, Journ. de conch., 1862, vol. x. p. 7). 



Species. 

 1. Amalthea acuta (Quoy and Gaimard). 2. Amalthea australis (Lam.) 



1. Amalthea acuta (Quoy and Gaimard). 



Hipponyx acuta, Quoy and Gaimard, "Astrolabe," Zool., vol. iii. p. 437, pi. lxxii. figs. 35-38. 

 Hipponix acuta, Lamarck (ed. Desh.), vol. vii. p. 615, sp. 3. 

 Hipponyx acutus, Crosse, Journ. de conch., 1862, vol. x. p. 22, sp. 7. 



July 29, 1874. Levuka, Fiji. 12 fathoms. 



Habitat. — New Ireland (Quoy and Gaimard), Pacific Islands (British Museum), 

 "trouve sur Cerithium lave, Australie" (Geneva Museum, Collection Delessert, but 

 unnamed). 



2. Amalthea australis, Lamarck. 



Patella australis, Lamarck, Anim. s. vert., vol. vi. (1) p. 335, sp. 44, and (ed. Desh.) voL vii. p. 541, 



sp. 44. 

 Hipponix australis, Deshayes, Encycl. method., vers, vol. ii. p. 274, sp. 1. 



„ „ Quoy and Gaimard, " Astrolabe," vol. iii. p. 434, pL lxxii. figs. 25-34. 



Patella australis, Delessert, Recueil, pi. xxiii. fig. 11. 

 Amalthea australis, Adams, Genera, vol. i. p. 374, pi. xli. fig. 4. 

 Hipponyx australis, Crosse, Journ. de conch., 1862, vol. x. p. 21, sp. 6. 



(ZOOL. CHALL. EXP. — PART XLII. — 1885.) Tt 58 



