90 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



rim is thin. The suboral region flares (ii°) within the 

 upper 0.84 oral diameter, and the bowl swells a little (to 1.09 

 oral diameter) near its middle. It contracts below (30°), 

 with fairly convex sides. The aboral region tends to a little 

 lateral concavity and is sharply pointed, although not pro- 

 longed at the tip. 



The hyaline wall hardly exceeds 0.08 oral diameter in 

 thickness. 



Length, 90^1. 



Parundella lachmanni is close to P. minor and P. grandis, 

 but differs from these two species in having suboral flare and 

 median swelling, as well as in being somewhat longer. 

 Other species are so different as to occasion no confusion. 



Recorded from seventeen stations, one in the Atlantic and 

 sixteen in the Pacific, as follows: one ( 14) in the Gulf Stream, 

 one (35-36) in the Pacific equatorial region, seven (44, 68, 

 69> 7i> 75. 76, 77) in the Galapagos region, three (64, 66, 67) 

 in the South Pacific middle latitudes, two (no, 150) in the 

 North Pacific trade region, one (114) in the North Pacific 

 middle latitudes, and two (133, 148) in the California region. 



There are 13 pump and 10 net samples, of which 6 were 

 taken at the surface, 6 at 50 meters, and 11 at 100 meters. 

 Maximum frequency, 30 per cent at station 114; other records 

 above minimum (2 to 24 per cent) from stations 14, 35-36, 

 68, 69, 71, 75, 77, 148; average in Pacific net samples, 7.3 

 per cent. 



Temperature: Atlantic, net sample i4?02; Pacific, pump 

 samples i5?9o-23?46 (i8?55), net samples i5?03-23?72 

 (i8?o8). Salinity: Atlantic, net sample 35.59; Pacific, pump 

 samples 34.54-35.24 (35.12), net samples 34.30-36.04 (35.89). 

 Density: Atlantic, net sample 26.66; Pacific, pump samples 

 24.00-25.91 (25.04), net samples 24.49-25.55 (25.05). pH: 

 Atlantic, net sample 8.06; Pacific, pump samples 7.86-8.32 

 (8.25), net samples 8.09-8.19 (8.12). 



Parundella longa Jorgensen 



Parundella longa, Kofoid and Campbell, 1929, pp. 231-232, fig. 

 429. 



The narrow, elongated lorica, with cylindrical upper bowl, 

 long conical section, and drawn-out lance, has a length of 

 6.0 oral diameters. The thin, erect oral margin is sharp- 

 edged. The cylindrical section has a length of 0.48 total 

 length; its diameter is uniform. The aboral section is nar- 

 row, conical (25°), and almost 0.3 total length in length. 

 The lance is also conical (7°) and 0.22 total length in length. 

 It is gradually differentiated from the aboral cone, and its 

 free tip is sharp. 



The hyaline wall is uniformly 0.15 oral diameter in thick- 

 ness, save just below the rim. 



Length, 190^.1. 



Parundella longa differs from P. aculeata in the greater 

 elongation of the aboral cone, the longer lance, and the more 

 slender proportions and dimensions. Parundella transluccns 

 is shorter and wider and has a shorter aboral cone and lance; 

 its suboral margin also flares. 



Recorded from six stations in the Atlantic, as follows: two 

 (5, 6) in the Adantic drift, one (6-7) in the North Sea, two 



(13, 14) in the Gulf Stream, and one (18) in the Sargasso 

 Sea. 



There are 2 pump and 5 net samples, of which 2 were 

 taken at the surface, 2 at 50 meters, and 3 at 100 meters. 

 Frequency, 4 per cent at station 14; other records minimum; 

 average in net samples, 1.7 per cent. 



Temperature: pump samples i4?33-23?88 (i7?2i), net 

 samples i4?02-22?i2 (i5?77). Salinity: pump samples 

 34.88-35.96 (35.19), net samples 35.55-36.82 (35.99). Den- 

 sity: pump samples 24.42-26.17 (25.56), net samples 25.58- 

 26.95 (26.61). pH: pump samples 7.88-8.23 (7.98), net 

 samples 8.06-8.24 (8.16). 



Parundella pellucida (Jorgensen) emended Kofoid 

 and Campbell 



Parundella pellucida, Kofoid and Campbell, 1929, p. 233, fig. 

 43S; Hada, 1932/', p. 568, fig. 21. 



The small, short lorica, with tubular bowl, contracted 

 aboral cone, and lance, has a length of 4.0 oral diameters. 

 The thin-edged oral margin is erect. The long subcylindrical 

 section of the bowl has a length of 0.56 total length and its 

 diameter is similar throughout. The aboral cone (42°) has 

 a length of 1.25 oral diameters, below which it contracts as 

 an inverted cone (12°), the basal diameter of which is 0.25 

 oral diameter, the length being 0.75 oral diameter. The 

 lance is conical (8°), with a length of i.o oral diameter, and 

 with its free tip sharp. 



The wall is hyaline and uniformly about 0.02 oral diam- 

 eter in thickness, except in the lance. 



Length, 72 to i02\l. 



Parundella pellucida differs from P. infiata in having a 

 cylindrical bowl, and in the fuller aboral cone and stouter 

 lance. It lacks suboral flare, which is present in P. trans- 

 luccns and P. lagena. Parundella longa is longer and lacks 

 the doubled aboral contraction, as does P. major. The longer 

 P. caudata has a stouter lance. 



Recorded from three stations, one in the Atlantic and two 

 in the Pacific, as follows: one (14) in the Ciulf Stream, one 

 (65) in the South Pacific middle latitudes, and one (118) in 

 the East Asiatic marginal sea. 



There are 2 pump and i net sample, of which i each was 

 taken at the surface, 50 meters, and 100 meters. Frequency, 

 minimum. 



Temperature: Atlantic, pump sample i4'?95; Pacific, pump 

 sample io?i8, net sample i5';o3. Salinity: Atlantic, pump 

 sample 35.10; Pacific, pump sample 33.61, net sample 34.30. 

 Density: Atlantic, pump sample 26.08; Pacific, pump sample 

 25.85, net sample 25.44. P^- Atlantic, pump sample 8.18; 

 Pacific, pump sample 8.21, net sample 8.10. 



Parundella praetenuis Kofoid and Campbell 

 Parundella praetenuis Kofoid and Campbell, 1929, p. 233, fig. 



439- 



The short, wide, bell-shaped lorica, with conical aboral 



region and conical lance, has a length of 2.56 oral diameters. 



The thin oral margin is sharp-edged. The plump bowl 



tapers (10°) within its anterior 0.39; the diameter of the 



