74 



ALLAN HANCOCK PACIFIC EXPEDITIONS 



VOL. 15 



?G. edentata Hansen, 1882, p. 17, pi. 5, figs. 16-18. 

 G. rugosa Johnson, 1901, pp. 409-411, pi. 10, figs. 101-102 

 Augener, 1934, pp. 143-144; Hartman, 1940, p. 246. 

 Not Rioja, 1944, p. 128, figs. 35-39. 



Collections.— -943-39 (3); 990-39 (2) 

 1012-39 (1); 1020-40 (2); 1030-40 (2) 

 1078-40 (1); 1121-40 (1); 1123-40 (1) 

 1130-40 (10); 1131-40 (1); 1133-40 (1) 



1139-40 (2) 



1191-40 (1) 



1210-40 (2) 



1235-41 (1) 



1264-41 (1) 



1295-41 (2) 



1372-41 (2) 



1441-41 (2) 



1003-39 (1) 

 1045-40 (4) 

 1126-40 (5) 

 1134-40 (1) 

 1160-40 (2) 

 1205-40 (2) 

 1226-41 (1) 

 1259-41 

 1276-41 

 1304-41 

 1413-41 



(1) 

 (1) 

 (1) 

 (1) 



1010-39 

 1068-40 

 1129-40 

 1135-40 

 1168-40 

 1207-40 

 1232-41 

 1260-41 

 1288-41 

 1356-41 

 1417-41 



(3) 

 (1) 

 (1) 

 (1) 

 (1) 

 (3) 



(1) 

 (3) 

 (1) 

 (1) 

 (1) 



1142-40 (2); 1143-40 (1) 



1193-40 (1); 1202-40 (2) 



1211-40 (7); 1213-40 (1) 



1243-41 (1); 1254-41 (1) 



1265-41 (1); 1267-41 (1) 



1297-41 (1); 1300-41 (1) 



1390-41 (1); 1412-41 (2) 



1442-41 (several); 1444-42 (2); 1459-42 (1); 1463-42 

 (2); 1468-42 (2); 1472-42 (1); 1476-42 (3); 1477-42 (2); 1490-42 

 (4) ; 1493-42 (1) ; 1494-42 (1) ; 1496-42 (3) ; 1501-42 (1) ; 1502-42 

 (2) ; 1505-43 (2) ; others from central and northern California along 

 shore (9) ; Puget Sound, Washington (3) ; North Carolina (about 

 30) ; Grand Isle, Louisiana, collected by Dr. E. H. Behre (3). 



The type individuals of G. jucunda Kinberg (1866, p. 245) and G. 

 laevis Kinberg (1866, p. 245) both from Brazil, deposited in the 

 Swedish State Museum at Stockholm, Sweden, have been reexamined 

 and are believed the same as G. americana Leidy. G. corrugata Baird 

 (1863, p. 109) from Vancouver Island, western Canada, is also believed 

 to be the same ; it was said to lack branchial filaments but they may have 

 been withdrawn, as is not infrequent in preserved materials. 



Proboscidial organs are of 2 kinds; the more numerous ones are the 

 smaller, ovate or elongate in shape, and the larger ones are ovate to 

 subspherical. The latter appear smooth and unadorned. The smaller 

 ones have 2 obscure, transverse ridges on their distal halves, recalling the 

 transverse bars of G. robusta Ehlers. The apical pore is nearly distal but 

 is directed toward the oral aperture, when the proboscis is extended. 

 G. americana Rioja (1944, p. 128) from Argentina, is here believed 

 to be a different species, since the proboscidial organs are distinctly 

 ridged, much as in G. robusta Ehlers. 



Distribution. — G. americana Leidy occurs on both sides of the 

 Americas; in the Atlantic it is known from New England south to 

 Brazil; in the Pacific it is recorded from western Canada south to Peru. 



