CHOROLOGY OF THE SPECIES. 
A.—LIST OF STATIONS AND THE GEOGRAPHICAL POSITIONS AT WHICH 
ASTEROIDEA WERE COLLECTED, WITH THE ENUMERATION OF 
THE SPECIES OBTAINED AT EACH STATION. 
I, CHALLENGER: EXPEDITION. 
Sration I. South-west of Cape Finisterre. December 30, 1872. Lat. 41° 58’ 0” N., 
long. 9° 4270” W. Depth 1125 fathoms. Blue mud. 
Hymenaster membranaceus. 
Off the coast of Portugal: January 1873. Station and conditions not recorded. 
Pararchaster armatus. Algo at Stations 46 and 50. 
Station V. ‘South of Cape St. Vincent. January 28, 1873. Lat. 35° 47/0” N., long. 
8° 23’ 0” W. Depth 1090 fathoms. Globigerina ooze. Bottom temperature 
38°°5 Fahr.; surface temperature 61°:0 Fahr. 
Plutonaster bifrons. Also at Station 47. 
Station 3. South-west of the Canary Islands. February 18,1873. Lat. 25° 45’ 0” N., 
long. 20° 14’ 0” W. Depth 1525 fathoms. Hard ground. Bottom tempera- 
ture 37°°0 Fahr.; surface temperature 65°°0 Fahr. 
Nymphaster protentus. 
Colpaster scutigerula. 
Station 24, North-west of St. Thomas, Virgin Islands. March 25, 1873. Lat. 18° 38’ 
30” N., long. 65° 5’ 30” W. Depth 390 fathoms. Pteropod ooze. Surface 
temperature 76°°0 Fahr. 
Brisinga cricophora. 
‘Sration 36. Off Bermuda. April 22, 1873, Lat. 32° 7/ 25” N., long. 65° 4! 0” W. 
Depth 30 fathoms. Coral. Surface temperature 67°°5 Fahr. 
Chextaster longipes. Also at Station 75. 
