114 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



Caribbean Sea, three (35-36, 38, 154) in the Pacific equa- 

 torial region, nine (40, 44, 45, 69, 71, 73, 78, 79, 80) in the 

 Galapagos region, three (48, 84, 98) in the region of South 

 Pacific island fields, and four (115, 142, 144, 145) in the 

 North Pacific middle latitudes. 



There are 21 pump and 20 net samples, of which 13 were 

 taken at the surface, 14 at 50 meters, and 14 at 100 meters. 

 Maximum frequency, 25 per cent at stations 35-36, 115; other 

 records above minimum (2 to 20 per cent) from stations 15, 

 16, 18, 33, 38, 40, 44, 45, 69, 71, 80, 144, 154; averages, 3.5 

 and 1.6 loricae in Atlantic and Pacific pump samples, and 

 I.I and 10.2 per cent in Atlantic and Pacific net samples, 

 respectively. 



Temperature: Atlantic, pump samples i9?27-28?49(24?i2), 

 net samples i4?32-26?46 (20?87); Pacific, i5?33-27?52 

 (22?49) and i6?58-28?7i (2i?76), respectively. Salinity: 

 Atlantic, pump samples 36.25-37.00 (36.42), net samples 

 35.96-38.37 (36.81); Pacific, 34.47-36.29 (35.28) and 32.88- 

 36.42 (33.16), respectively. Density: Atlantic, pump samples 

 22.73-26.12 (24.66), net samples 23.8^26.91 (25.11); 

 Pacific, 23.88-25.30 (24.44) 3nd 21.31-25.83 (24.04), respec- 

 tively. pH: Atlantic, pump samples 8.21-8.30 (8.23), net 

 samples 8.14-8.32 (8.19); Pacific, 8.04-8.31 (8.21) and 7.77- 

 8.33 (8.05), respectively. 



STEENSTRUPIELLA Kofoid and Campbell 



Steenstrupiella Kofoid and Campbell, 1929, pp. 311-312. 



The elongated loricae of this genus are related to Am- 

 phorella, and are tropical. 



Three species are described here. 



Steenstrupiella gracilis (Jorgensen) Kofoid and Campbell 

 Steenstrupiella gracilis, Kofoid and Campbell, 1929, p. 313, fig. 

 597- 



The short, plump lorica, with little-Haring collar and 

 tubular bowl with blunt aboral end, has a length of 2.66 oral 

 diameters. The thin oral margin is merely the upper end 

 of the low collar. The collar is a basal segment of an in- 

 verted truncated, slightly rounded cone (46°) with a length 

 of 0.5 oral diameter and with a diameter at the lower end of 

 0.84 oral diameter. The tubular bowl, with the same diam- 

 eter as at the throat, reaches 0.75 total length, then suddenly 

 becomes conical (42°) for a short distance, and finally be- 

 comes bluntly angular (110°), although without distinct 

 pointing. 



There are 4 (or 6) short, ridgelike fins, the length of which 

 reaches nearly 0.67 oral diameter, and which are located 

 within the lower part of the tubular section of the bowl and 

 the upper part of the blunt, closed aboral end. The wall 

 reaches 0.16 oral diameter in thickness in the neck and is 

 elsewhere decidedly thinner. It is hyaline. 



Length, 79H. 



The lorica figured by Jorgensen (1924) is not the same as 

 that figured by Kofoid and Campbell (1929), although the 

 latter credit it to the former. The Carnegie loricae are of 

 the latter type, and it is not unlikely that Kofoid and Camp- 



bell's specimen actually was from the eastern tropical Pacific 

 rather than the Mediterranean. The species may later re- 

 quire a new name. 



Steenstrupiella gracilis is shorter and relatively thicker 

 than the other species. Its aboral end is not swollen as is 

 that of S. robusta, nor is it saccular to pointed as in the 

 much longer S. steenstrupii. It has no median swelling as 

 in the greatly elongated S. intumescens. Were it shorter and 

 without nuchal thickening, it would be close to Canthanella 

 septinaria. 



Recorded from eleven stations, one in the Atlantic and 

 ten in the Pacific, as follows: one (20) in the Sargasso Sea, 

 two (38, 153) in the Pacific equatorial region, three (49, 85, 

 89) in the region of South Pacific island fields, one (77) in 

 the Galapagos region, two (no, 150) in the North Pacific 

 trade region, and two (142, 144) in the North Pacific middle 

 latitudes. 



There are 8 pump and 3 net samples, of which 4 were 

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

 Maximum frequency, 10 per cent at station 38; other records 

 all minimum. 



Temperature: Atlantic, net sample 25?72; Pacific, pump 

 samples i7?46-28?38 (22?88), net samples 23^72-26^48 

 (25? 10). Salinity: Atlantic, net sample 36.60; Pacific, pump 

 samples 34.20-36.24 (35.08), net samples 32.88-36.04 (34.46). 

 Density: Atlantic, net sample 24.34; Pacific, pump samples 

 21.78-25. 1 1 (23.98), net samples 21.31-24.53 (22.92). pH: 

 Atlantic, net sample 8.26; Pacific, pump samples 8.14-8.47 

 (8.29), net samples 8.19-8.33 (8.26). 



Steenstrupiella robusta Kofoid and Campbell 



(Figure 114) 



Steenstrupiella robusta Kofoid and Campbell, 1929, p. 313, fig. 

 595; Marshall (part), 1934, pp. 655-656 (see also 5. steen- 

 strupii) . 



The phial-shaped lorica, with blunt, swollen pyramidal 

 aboral end, has a length of 2.8 oral diameters. The oral 

 margin is thin, and there is a low, widely spread collar 

 below it. The collar is a basal segment of a truncated cone 

 (80°) with barely concave sides, with a length of only 0.43 

 oral diameter, and with a diameter at the lower end of 0.62 

 oral diameter. The longer, tubelike anterior part of the 

 bowl extends with uniform diameter (the same as the 

 throat) for 1.58 oral diameters; the aboral region is swollen 

 angular and generally pyramidal. It begins, at the lower end 

 of the tubular section, to expand as a basal segment of a 

 smooth cone (25°); this subdivision has a length of 0.33 oral 

 diameter and reaches a diameter at the lower end of nearly 

 0.63 oral diameter. Below this level the wall contracts evenly 

 as a segment of an inverted truncated cone (20°) with a 

 length of 0.54 oral diameter, and with a diameter of about 

 0.4 oral diameter at its lowermost end. At the aboral end is 

 an inverted, plane, bluntly pointed pyramid (92°) with a 

 length of about 0.2 oral diameter. There are 6 low, line- 

 like, convex, erect fins with length of approximately 0.67 

 oral diameter. 



The wall thickens at the neck to over 0.16 oral diameter. 



