I If. 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



Dadayiella acutiformis has longer and fewer suboral facets 

 than cither D. ganymedes or D. bidbosa. Its horn is stockier 

 than that of ganymedes and lacks the bulb of bulbosa. The 

 bowl is taller and bell-like, in contrast with that of D. carta. 

 The remaining species are decidedly dissimilar. 



Recorded from two stations (19, 20) in the Sargasso Sea. 

 There were 2 loricae, taken in net samples, one from 50 and 

 the other from 100 meters. 



Temperature, 22?56-25?3i ( 23^93); salinity, 36.73-37.15 

 (36.94); density, 24.89-25.38 (25.13); pH, 8.19-8.27 (8.23). 



Dadayiella bulbosa (Brandt) Kofoid and Campbell 



Dadayiella bidbosa, Kofoid and Campbell, 1929, p. 320, fig. 611. 

 Amphorella ganymedes, Hofker, 1931, p. 384, fig. 79". b. 



The tall, narrow, bell-shaped lorica, with aboral horn with 

 swollen knob, has a length of 3.53 oral diameters. The thin, 

 membrane-like oral margin is faceted with 20 facets. These 

 facets are supported by vertical riblets; alternate stays are 

 stronger and longer than intercalary ones. The riblets 

 occupy most of the upper 1.0 oral diameter of the bowl. 

 There is hardly any suboral flare, and the bowl is virtually 

 subcylindrical for a little over half its length; at the lower 

 end it contracts as an inverted convex cone (40 ) with a 

 diameter at its truncate end of less than 0.24 oral diameter. 

 The aboral horn below the conical part is cylindrical, with 

 a length of 0.61 oral diameter. Its lateral contour is de- 

 cidedly concave, and toward the tip it swells into a knob 

 with a flattened tip. From the tip there frequently extends 

 a short spike, and there are 4 tiny vertical finlets on the knob. 

 The wall is distinctly hyaline; especially is it difficult to 

 examine the oral region adequately because of its trans- 

 parency, it is not thick, and the lumen probably extends 

 into the knob as a minute canal. 

 Length, 93 to 125U.. 



In the presence or absence of the posterior spikelet, in the 

 length of the finlets, in the extent of bulbosity, in the number 

 of facets, and in the degree of lateral concavity of the bowl, 

 these loricae vary among themselves. 



The aboral bulb is the character which immediately dis- 

 tinguishes Dadayiella bulbosa from other species; some forms 

 of D. carta also have a bulb, but the latter species is always 

 smaller and shorter, with a different bowl. From D. jorgen- 

 seni, bidbosa may be distinguished by the lack of lateral 

 spikes on the bulb. 



Hofker's loricae ( 1931 ) clearly have bulbs and cannot be 

 assigned to D. ganymedes. 



Recorded from twenty stations, five in the Atlantic and 

 fifteen in the Pacific, as follows: two (2, 14) in the Gulf 

 Stream, two (25, 27) in the Atlantic equatorial region, one 

 (32) in the Caribbean Sea, seven (43, 69, 71, 77, 78, 79, 80) 

 in the Galapagos region, seven (iio-m, 112, 113, 114, 116, 

 117, 128) in the North Pacific middle latitudes, and one 

 ( 146) in the California region. 



There are 9 pump and 14 net samples, of which 7 were 

 taken at the surface, 9 at 50 meters, and 7 at 100 meters. 

 Maximum frequency, 11 per cent at station 112; other records 



above minimum (2 to to per cent) from stations 2, 14, 32, 

 113, 114, 116, 117; averages, 1.7 per cent in Atlantic net 

 samples, 1.2 loricae and 3.8 per cent in Pacific pump and net 

 samples, respectively. 



Temperature: Atlantic, pump sample 26^04, net samples 

 i 4 ?02-26?6 4 (2i?oo); Pacific, n?88-2 4 °55 (i9?n) and 

 8?93~26?o6 (i8?o8), respectively. Salinity: Atlantic, pump 

 sample 36.25, net samples 35.59-36.40 (36.07); Pacific, 33.07- 

 36.04 (34.84) and 33.79-36.04 (34.90), respectively. Density: 

 Atlantic, pump sample 23.98, net samples 23.55-26.66 (25.40); 

 Pacific, 23.58-25.89 (24.69) and 23.75-26.41 (24.77), respec- 

 tively. pH: Atlantic, pump sample 8.30, net samples 8.06- 

 8.30 (8.24); Pacific, 8.09-8.22 (8.1 1 ) and 7.98-8.26 (8.16), 

 respectively. 



Dadayiella cuspis Kofoid and Campbell 



Dadayiella cuspis Kofoid and Campbell, 1929, pp. 320-321, fig. 

 614. 



The very small lorica, with facets extending to the aboral 

 region and with short horn, has a length of 2.91 to 3.10 oral 

 diameters. The oral margin is thin, erect, and smooth, and 

 is formed by the edges of about 12 subequal vertical facets. 

 These facets are long planes and form the bowl. The bowl 

 as a whole flares 12 in the upper tenth and becomes a cone 

 (5 ) for about 0.8 the length, finally becoming a broader 

 cone (50 ) in the aboral 0.2. The conical (10°), pointed 

 aboral horn has a length of 0.12 to 0.18 total length. 



The exceedingly thin wall is hyaline; there is no prismatic 

 structure and laminae are not differentiated. 



Length, 67 to 93".. 



The facets of Dadayiella cuspis extend to the very end of 

 the bowl, unlike those of D. pachytoecus, which die away 

 near the aboral end. In all the other species facets are lim- 

 ited to the suboral region. The general form is much like 

 that of D. ganymedes, but size and facets serve to distinguish 

 the two species. 



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

 (65) in the South Pacific middle latitudes, and one (147) in 

 the California region. 



Both records are from 100 meters, in net samples. Fre- 

 quency, 2 per cent at station 147. 



Temperature, I5?03-I9?27 (17? 15); salinity, 34.30-35.04 

 (34.67); density, 25.00-25.44 (25.22); pH, 8.10-8.29 (8.19). 



Dadayiella ganymedes (Entz, Sr.) Kofoid and Campbell 

 (Figure 128) 



Dadayiella ganymedes, Kofoid and Campbell. [929, p. 321. fig. 



610; Marshall, 1934, p. 657. 

 Not Amphorella ganymedes, Hofker, 1931, p. 384, fig. 79 (see 



D. bidbosa). 



The elongate, chalice-shaped lorica, with simple, pointed 

 aboral horn, has a length of 4.0 oral diameters. The oral 

 margin is regularly faceted with 7 to 12 facets, and exceed- 

 ingly thin-edged. The suboral facets extend from the margin 

 for a distance of 0.21 total length, and there are thin vertical 



