4 THE VOYAGE OF H.M.S. CHALLENGER. 



List of Stations given further on, by tliose interested to know the actual species found 

 in such deep water. I here merely make a few observations respecting the different 

 genera there met with. At the above thirty-three Stations only twenty-three different 

 genera were found, although the majority of these occurred in more than one place. 

 The genera Amussium and Area were met with at seven of the Stations ; Necera at five ; 

 Lima and Callocardia at four ; Malletia, Limopsis, Cryptodon, Ahra, Lyonsiella, and 

 Verticordia &tihxe&; Leda, Nucula, Pecten, Silenia, and Sarepta at two; and Modiolaria, 

 Dacrydium, Pectuncidus, Venus, Myrina, and Glomus at one only. 



Some of the species occurred in more than one locality, showing at times a very 

 remarkable geographical distribution. 



The following are some of the principal instances : — 



Silenia sarsii, 



Saxieam arctica, . 



Semele [Abra) profundorum, 



Petricola lapieida, . 



Venus (Chamelcea) mesodesma, 



Cardium siieziense, 

 Verticordia deshayesiana, 



Kellia suborhieidaris, . 

 Astarte magellanica, 

 Cardita calyculata, 



Nuculina ovalis, . 



Sarepta ahyssicola, 



Limopsis pelagica, 



Area imbricata, 



Area {Barbatia) pteroessa, 



About 1100 miles south-west of Australia, in 1950 



fathoms ; also off the mouth of the Eio de la Plata, in 



2650 fathoms. 

 Cosmopolitan, to 500 fathoms. 

 Near the Canary Islands, in 1125 fathoms, and Mid 



North Pacific, in 2900 fathoms. 

 North Australia, in 7 fathoms ; a well-known West 



Indian form. 

 New Zealand, on the beach, and off Tristan da Cunha, in 



1000 fathoms. 

 A Red Sea species ; from Fiji, in 12 fathoms. 

 Off Pernambuco, in 350 fathoms, and near Cape York, in 



155 fathoms. 

 A British species ; from Kerguelen Island, in 28 fathoms. 

 A Strait of Magellan species ; from ]\Iarion Island. 

 Off Tenerife, in 70 fathoms, and in Bass Strait, in 38 to 



40 fathoms. 

 A fossil of the Suffolk Crag ; from the Cape of Good 



Hope, in 15 to 20 fathoms. 

 Mid North Pacific, in 2050 fathoms, and Mid South 



Pacific, in 2385 fathoms. 

 Mid Atlantic, in 1850 fathoms, and off Japan, in 345 



fathoms. 

 A West Indian species, from near Cape York, in 25 fathoms. 

 Mid North Pacific, in 2050 fathoms; west of the Azores, 



in 1000 and 1675 fathoms; and the West Indies, in 



390 fathoms. 



