Echinoidea from Southern Chile — PAWSON 
207 
Stn. 33. Puerto Eden, 49°09 / 28"S, 74°26'06" 
W; depth 11-12 m, sandy mud with Mytilus 
shell; dredge; Dec. 8, 1958. P. magellanicus , 
17 specimens. 
Stn. 37. Caletta Lackawana, 49°10'32"S, 74°25' 
52"W; depth 18 m, sand rock, shell; dredge; 
Dec. 9, 1958. P. magellanicus, 1 specimen. 
Stn. 39- Puerto Eden, west side of Canal Sur, 
49°09'52"S, 74°26'08"W; intertidal boulder 
beach of granitic gneiss; hand collecting and 
collection from Macrocystis fronds and hold- 
fasts; Dec. 9-11, 1958. A. dufresnei, 6 speci- 
mens; P. magellanicus, 9 specimens; Loxe- 
chinus albus, 5 specimens. 
Stn. 40. Isla Duke and Isla Levinson, Puerto 
Eden, 49°09'02"S, 74°25'10"W; intertidal 
and sublittoral granitic gneiss rocks; hand 
collecting; Dec. 12-13, 1958. P. magellani- 
cus, 5 specimens. 
Stn. 44. Puerto Eden, 49°08'16"S, 74°25'34" 
W; depth 3-5 m sand; Dec. 18, 1958. P. ma- 
gellanicus, 7 specimens. 
Stn. 49. Bahia Munoz Gomera, 59°20'S, 73°32' 
W; intertidal basaltic rock; hand collecting 
and collection from Macrocystis holdfasts; 
Dec. 26, 1958. P. magellanicus, 1 specimen. 
Stn. 50. Puerto Williams, Isla Navarino, 54° 
55'40"S, 67°39'W; intertidal boulder beach; 
hand collecting; Jan. 7, 1959. P. magellani- 
cus, 1 specimen. 
Stn. 51. Puerto Williams, Isla Navarino, 54° 
55'30"S, 67°34'30"W; intertidal argillite 
rocks; hand collecting and collection from 
Macrocystis fronds and holdfasts; Jan. 8, 24, 
31, 1959. P. magellanicus, 6 specimens; L. 
albus, 2 specimens. 
Stn. 52. Puerto Robalo, Isla Navarino, 54° 5 5' 
50"S, 67°4l'40"W; intertidal argillite rock; 
hand collecting and collection from Macro- 
cystis fronds and holdfasts; Jan. 10, 16, 23, 
30, 1959- A. dufresnei, 3 specimens; P. ma- 
gellanicus, 17 specimens. 
Stn. 57. Isla Hermite, Caleta San Martin, 55° 
51'S, 67°32'W; intertidal granitic rock; hand 
collecting; Jan. 13, 1959. L. albus, 1 specimen. 
Stn. 66. Puerto Williams, Isla Navarino, 54° 
55'35"S, 67°36'50 / 'W; depth 2-4 m, grey 
mud with boulders; dredge; Jan. 22, 1959- 
P. magellanicus, 7 specimens. 
Stn. 68. Puerto Williams, Isla Navarino, 54° 
55'40"S, 67°36'50"W; depth 0-5 m; collec- 
tion by diving; Jan. 29, 1959. P. magellani- 
cus, 34 specimens. 
Stn. 70. Isla Bertrand, 55°l4'30"S, 67°55'40" 
W; intertidal granitic rock, very exposed; 
hand collecting; Feb. 3, 1959. L. albus, 8 
specimens. 
Stn. 73. Seno Grandi, small island opposite 
Puerto Grandi, 55°15'S, 67°56'W; collection 
from Macrocystis fronds and holdfasts; Feb. 
5, 1959. P. magellanicus, 12 specimens. 
Stn. 74. Seno Grandi, peninsula on Isla Nava- 
rino opposite Puerto Grandi, 55°11'20 // S, 
67°56'W; collection from Macrocystis fronds 
and holdfasts; Feb. 5, 1959. P. magellanicus, 
5 specimens. 
Stn. 75. Seno Grandi, point on Isla Navarino 
east of Rio Grande, 55°11'20"S, 67°52'30" 
W; intertidal volcanic rocks, sheltered; hand 
collecting; Feb. 5, 1959. P. magellanicus, 1 
specimen. 
Stn. 77. Puerto Grandi, Isla Bertrand, to the 
west of the wharf, 55°12'S, 67°55'30" W; 
intertidal granitic rocks and boulder beach, 
semisheltered; hand collecting; 7/2/1959; 
collection by diving among Macrocystis; Feb. 
8, 1959. P. magellanicus, 2 specimens. 
ECHINOIDEA 
Family ARBACIIDAE Gray, 1855 
Arbacia Gray, 1835 
TYPE SPECIES: Arbacia lixula (Linnaeus). 
REMARKS: This well-defined genus contains 
seven species, of which A. dufresnei (Blain- 
ville) and A. spatuligera (Valenciennes) are 
known from southern Chile. Unfortunately the 
latter species is not represented in the present 
collection. 
