86 
THE VOYAGE OF H.M.S. CHALLENGER 
Station 230, April 5, 1875 ; Admiralty Islands to Yokohama; lat. 26° 29' N., 
long. 137° 57' E. 
Station 256, July 21, 1875 ; Yokohama to Sandwich Islands; lat. 30° 22' N., 
long. 154° 56' W. 
Station 295, November 5, 1875 ; Tahiti to Valparaiso ; lat. 38° 7' S., long. 94° 4' W. 
Station 327, March 4, 1876 ; Rio de Janeiro to Tristan da Cunha ; lat. 36° 48' S., 
long. 42° 45' W. 
II. Deposit shells. 
Station 24, March 25, 1873 ; off Culebra Island ; lat. 18° 38' 30" N., long. 65° 5' 30" 
W.; depth, 390 fathoms; bottom, Pteropod ooze. 
Station 33, April 4, 1873 ; off Bermuda; lat. 32° 21' 30" N., long. 64° 35' 55" W.; 
depth, 435 fathoms ; bottom, coral mud. 
Station 78, July 10, 1873 ; off the Azores; lat. 37° 26' N., long. 25° 13' W.; depth, 
1000 fathoms; bottom, volcanic mud. 
Station 85, July 19, 1873 ; off Palma Island (Canaries); lat. 28° 42' N., long. 18° 6' 
W.; depth, 1125 fathoms; bottom, volcanic mud. 
Station 120, September 9, 1873 ; off the coast of South America, between Pernam- 
buco and Bahia; lat. 8° 37' S., long. 34° 28' W.; depth, 675 fathoms; bottom, red mud. 
Station 122, September 10, 1873; off the coast of South America, between Pernam- 
buco and Bahia ; lat. 9° 5' S., long. 34° 50' W.; depth, 350 fathoms ; bottom, red 
mud. 
Station 185, August 31, 1874; off Raine Island; lat. 11° 35' 25" S., long. 144° 2' 0" 
E.; depth, 135 fathoms; bottom, coral sand. 
Station 323, February 28, 1876 ; Falkland Islands to Rio de la Plata; lat. 35° 39' S., 
long. 50° 47' W.; depth, 1900 fathoms; bottom, blue mud. 
Station 335, March 16, 1876 ; Tristan da Cunha to Ascension Island; lat. 32° 24' S., 
long. 13° 5' W.; depth, 1425 fathoms ; bottom, Pteropod ooze. 
As we have seen above, there are thirteen specific titles with various generic 
designations {Hyalsea, Cleodora, Pleuropus) applied to forms which we regard as young 
stages of some species of Cavolinia. 
Of these thirteen names it is necessary in the first instance to eliminate (1) Hyalsea 
complanata, Gegenbaur, 1855 ( = Hyalsea longijilis, Troschel, 1855), and (2) Pleuropus 
pellucidus, Eschscholtz (mistakenly identified by Gray as Cleodora curvata, Souleyet), 
which, in spite of the inadequacy of the figure and description given by Eschscholtz, 
appears to correspond to Hyalsea depressa , d’Orbigny. Since the figures and description 
given by the latter are more satisfactory, his designation Hyalsea depressa is the one 
adopted. 
