124 



OCEANIC TINTINXOINA OF LAST CRUISE OF CARNEGIE 



(24) in the Atlantic equatorial region, one (145) in the 

 North Pacific middle latitudes, and one (146) in the Cali- 

 fornia region. 



There are 4 net samples, of which 2 were taken at 50 

 meters and 2 at 100 meters. Frequency, 2 per cent at station 

 145; other records minimum. 



Temperature: Adantic, i5?55-24?44 ( 19^99); Pacific. 

 i9?i6-20?07 (i9?6i). Salinity: Adantic, 36.24-36.61 (36.42); 

 Pacific, 34.32. Density: Adantic, 24.47-26.34 (25.40); Pacific, 

 24.24-24.48 (24.36). pH: Atlantic, 7.96-8.25 (8.10); Pacific, 

 8.26-8.34 (8-30). 



Eutintinnus procurrerens Koloid and CampbsU 



Tiritinntis procurrerens Kofoid and Campbell, 1929, p. 338, fig. 

 653. 



The small, stout lorica, with wide-flaring aboral end, has 

 a length of 3.3 oral diameters. The thin oral margin has a 

 low, molded brim. The suboral funnel (30°) has a length 

 of 0.47 oral diameter and a diameter at its lower end of 0.59 

 oral diameter. The wide shaft tapers (2°) for approxi- 

 mately 2 oral diameters, then contracts (18°) for 0.59 oral 

 diameter and again flares (30°) in the lowermost section, 

 the length of which is about equal to that of the section just 

 above it. The wide-open aboral end is brimless. 



The hyaline wall is thin. 



Length, 138 to 2o6(.i. 



Eutintinnus procurrerens differs from E. turgescens in 

 having aboral flare, and from E. medius in the greater degree 

 of aboral flare as well as in aboral contraction above the flare. 

 Although contracted aborally, it does not resemble E. colli- 

 gatus, which is distincdy different. 



Recorded from nine stations in the Pacific, as follows: one 

 (63) in the South Pacific middle latitudes, one (80) in the 

 Galapagos region, one (84) in the region of South Pacific 

 island fields, three (105, 109, 139) in the North Pacific trade 

 region, and three (132, 136, 147) in the California region. 



There are 8 pump and 2 net samples, of which 3 were 

 taken at the surface, 3 at 50 meters, and 4 at 100 meters. 

 Maximum frequency, 4 per cent at station 147; 2 per cent at 

 station 136; in pump samples there were i to 2 loricae; aver- 

 age in net samples, 3 per cent. 



Temperature: net samples i8?95-i9?27 (19? 11), pump 

 samples i7?oi-27?52 (23'i'39). Salinity: net samples 34.88- 

 35.04 (34.96), pump samples 33.91-36.42 (35.34). Density: 

 net samples 24.96-25.00 (24.98), pump samples 22.71-25.22 

 (23.95). pH: net samples 8.29-8.34 (8.31), pump samples 

 8.08-8.34 (8.21). 



Eutintinnus stramentus Kofoid and Campbell 



Tintinntis stramentus Kofoid and Campbell, 1929, p. 339, fig. 

 635; Marshall, 1934, p. 659, fig. 40. 



The short lorica, with tapering shaft and rather strong 

 brim, has a length of 4.9 oral diameters. The oral margin 

 has a horizontal brim. The shaft lacks flare and tapers (5^) 

 throughout its whole length without any local modification. 

 The aboral end is brimless and its diameter is only 0.56 oral 

 diameter. 



The wall is exceedingly thin and almost transparent. 



Length, 1 15 to 17611. 



Eutintinnus stramentus lacks the suboral flare of E. lusus- 

 undae and is also shorter and more slender. Eutintinnus 

 attenuatus is much longer and more slender, with a wide 

 suboral funnel and much narrower aboral end. Among the 

 smaller species stramentus has no counterpart. 



Recorded from ten stations, four in the Atlantic and six 

 in the Pacific, as follows: two (18, 19) in the Sargasso Sea, 

 two (24, 25) in the Atlantic equatorial region, one (45) in 

 the Galapagos region, one (63) in the South Pacific middle 

 latitudes, one (99) in the Pacific equatorial region, one 

 ( no) in the North Pacific trade region, and two (147, 149) 

 in the California region. 



There are 6 pump and 5 net samples, of which 3 were 

 taken at the surface, 3 at 50 meters, and 5 at 100 meters. 

 Frequency, minimum. 



Temperature: Atlantic, net samples i4?6o-25?3i (i8?94); 

 Pacific, net sample 22^43, pump samples i5?84-23?86 

 (22?02). Salinity: Atlantic, net samples 35.61-37.15 (36.31); 

 Pacific, net sample 35.26, pump samples 34.58-35.28 (34.87). 

 Density: Atlantic, net samples 24.89-26.62 (25.98); Pacific, 

 net sample 24.31, pump samples 22.43-25.48 (24.07). pH: 

 .\tlantic, net samples 7.93-8.27 (8.04); Pacific, net sample 

 8.12, pump samples 8.08-8.34 (8.20). 



Eutintinnus tenuis Kofoid and Campbell 



Tintinnus tenuis Kofoid and Campbell, 1929, p. 339, fig. 655; 

 Hada, 19326, p. 571, fig. 25; Nie, 1934, pp. 79-80, fig. 16. 



The lorica is a tapering tube with slight brim, and has a 

 length of 4.9 oral diameters. The oral opening has a narrow, 

 molded brim. The shaft tapers (3°) without local modifica- 

 tion. The aboral end is rimless and its diameter is 0.69 oral 

 diameter. 



The hyaline wall is uniformly thin. 



Length, 179 to 31211. 



There is some variation in length, proportions, and aboral 

 contraction. 



Eutintinnus tenuis lacks the aboral flare of E. jraknon and 

 is more slender than E. lusus-undae. 



Recorded from four stations, one in the Adantic and three 

 in the Pacific, as follows: one (19) in the Sargasso Sea, one 

 ( 117) in the North Pacific middle latitudes, one (130) in the 

 California region, and one (140) in the North Pacific trade 

 region. 



There are i pump and 3 net samples, of which i was 

 taken at 50 meters and 3 at 100 meters. Maximum fre- 

 quency, 4 per cent at station 130; 2 per cent at station 117; 

 other records minimum; average in Pacific net samples, 3 

 per cent. 



Temperature: Adantic, net sample 25?3i; Pacific, net 

 samples 8?93-8?96 (8?94), pump sample 25^94. Salinity: 

 Adantic, net sample 37.15; Pacific, net samples 33.72-34.06 

 (33.89), pump sample 35.02. Density: Atlantic, net sample 

 24.89; Pacific, net samples 26.14-26.41 (26.27), pump sample 

 23.09. pH: Adantic, net sample 8.27; Pacific, net samples 

 7.98-8.05 (8.02), pump sample 8.34. 



