308 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



The types are from the Pleistocene of Lomita Quarry, California, 

 and it also occurs at Timms Point, California. The series of figures given 

 shows the very considerable amount of variation in the microspheric and 

 megalospheric forms. 



Stations: 84, 1003, 1005, 1011, 1013, 1062, 1064, 1111, 1113, 1116, 

 1118, 1151, 1153, 1163, 1170, 1171, 1185, 1188, 1189, 1191, 1192, 1193, 

 1195, 1201, 1228, 1233, 1242, 1244, 223, 227, 2065, 2070, 2098, 2160, 

 573, and 607. 



Distribution. — Stations 84 through 1244 are off the Channel Islands 

 and give a depth range of 10 to 160 fms. The average depth is 51 fms. 

 Stations 223 through 2160 are off Mexico in 53 to 250 fms. with an 

 average of 115 fms. Station 573 is off Peru and Station 607 is at Leish 

 in 15 and 10 fms. respectively. The most specimens of this species were 

 found off San Clemente Island in 37 fms. 



Genus MARGINULINA d'Orbigny, 1826 ' 

 Marginulina glabra d'Orbigny 

 Plate 40, Figs. 6-8 



Test longer than broad, variable in form, circular in transverse sec- 

 tion, later chambers uniserial in varying degrees; chambers distinct, 

 somewhat inflated, increasing rather rapidly in size as added; sutures 

 distinct, slightly depressed, only slightly curved; wall smooth; aperture 

 terminal, radiate. 



So many forms have been referred to this species that it is impossible 

 to give a definite synonymy. It shows a wide range of variation. 



Stations: 1072, 1075, 1079, 1083, 1086, 1118, 1139, 1143, 1144, 

 1159, 1160, 1161, 1165, 1172, 1181, 1184, 1190, 1201, 1203, 1205, 1216, 

 1218, 1221, 1229, 1230, 1233, 1234, 1238, 1240, 1244, 1245, 257, 283, 

 2009, 2010, 2017, 2051, 2064, 2084, 2097, 2098, 2156, 2157, 2164, 460, 

 466, 467, 606, and 648. 



Distribution. — Stations 1072 through 1245 are off the Channel Is- 

 lands with a depth range of 30 to 160 fms., the average being 72 fms. 

 Stations 257 through 2164 are off Mexico and in the Gulf of California. 

 The depth range is 20 to 112 fms., the average is 76 fms. Stations 460 

 to 467 are in the waters of the Galapagos Islands in 16 to 28 fms. Sta- 

 tions 606 and 648 are in the Mediterranean waters in 30 to 90 fms. 

 The best record for numbers of specimens thus far was at Outer Gorda 

 Bank off Mexico in 59-95 fms. 



