44 



OCEANIC TINTINNOINA OF LAST CRUISE OF CARNEGIE 



wavy. The erect oral cuff has a width of less than 0.04 oral 

 diameter and is quite hyaline. The cuplike bowl, with more 

 or less even upper margin, is narrow conical (4°) in the 

 anterior 0.78 oral diameter below the oral margin, and wider 

 (79°) in the posterior 0.5 oral diameter. The sides are full 

 in the upper bowl and distinctly convex in the lower part. 

 The aboral horn is a cone (15°) with a length of 0.5 oral 

 diameter. Its sides are sinuous and there are 2 or 3 short 

 pleats or folds near its upper end. 



The wall is subuniformly thin, being not more than 0.02 

 oral diameter in thickness. The oral cuff is less than half as 

 much. There are well developed thin laminae and radial 

 prisms. The wall is everywhere finely meshed without 

 lacunae, and the mesh continues over the horn. The cavity 

 follows the outer contour. 



Length, 200 to 400|X. 



Favella adriatica has a shorter, stouter bowl than F. cam- 

 panula, as well as a wider horn. Its horn is shorter and less 

 spinelike than that of F. fistuUcaiida, and it has an oral cuff 

 lacking in that species. Its horn is better developed than 

 that of F. azorica, and that species has a relatively longer 

 bowl. Favella arcuata has a suboral ledge, a relatively longer 

 bowl, and a shorter horn. Favella injundibidum has a 

 conical instead of cuplike bowl and a handle-shaped horn. 

 Favella confessa is of stouter facies, with a wider collar, a 

 serrated oral rim, and scarcely developed horn. Favella 

 attingata and F. serrata are very different species. 



Recorded from one station (no) in the North Pacific 

 trade region, in a pump sample taken at 100 meters. Fre- 

 quency, minimum. 



Temperature, i7?96; salinity, 34.73; density, 25.10; pH, 

 8.14. 



Favella azorica (Cleve) Jorgensen 

 (Figure 56) 



Favella azorica, Kofoid and Campbell, 1929, p. 151, fig. 284; 

 Marshall, 1934, p. 642, fig. 15. 



The small, cuplike lorica, with no teeth, generally convex- 

 conical bowl, and aboral horn, has a length of 1.5 oral diam- 

 eters. The oral rim is entire, thin, and erect. There is no 

 differentiated collar, and the upper subcylindrical bowl con- 

 tinues with the same diameter as that of the oral opening for 

 a distance of 0.64 oral diameter. Its sides are full and evenly 

 contoured. The lower bowl contracts as a convex cone 

 (60'') with a length of 0.57 oral diameter. The aboral horn 

 is a barely concave cone (55°) with a length of 0.39 oral 

 diameter, and it joins the lower bowl with gradual change 

 in contour. 



The wall has a subuniform thickness of o.i oral diameter 

 across the bowl. It thins to the oral rim, and in the lower 

 bowl and horn is a little less. There are clear inner and 

 outer laminae, enclosing a single layer of radial, very faint 

 prisms. The wall shows no trace of annuli. It is glass-clear. 



The animal has 2 oval macronuclei. 



Length, 82^. 



Marshall (1934) figures a lorica with suboral rings, alveolar 

 structure, and a length of 2 oral diameters. The length is 

 stated to be 73 to io7[x and the oral diameter 47 to 65^1. The 



Carnegie loricae, which were abundant, show little signifi- 

 cant variation, all certainly lacking annuli. 



Favella azorica most closely resembles F. composita, but 

 the latter species has a number of fine suboral rings and is 

 of somewhat different proportions. There is less difference 

 between bowl and horn in composita than in azorica. Favella 

 minutissima is tiny, with more sharply differentiated horn, 

 but does bear some general relationship to azorica. The 

 other species of Favella are unlike these species and can 

 hardly be confused with them. 



Recorded from off Easter Island, in a net sample taken at 

 the surface. Frequency, 75 per cent; there were hundreds 

 of loricae. 



No physical data were taken at this station. 



Favella minutissima, new species 

 (Plate I, figure 8; figure 59) 



The exceedingly small, cup-shaped lorica has a length of 

 1.5 oral diameters. The oral margin is erect and simple. 

 There is no differentiated collar. The bowl continues below 

 the rim for about i oral diameter with the same diameter 

 throughout. Below this level it forms an inverted, rounded 

 subhemisphere. The aboral horn has a length of approxi- 

 mately 0.5 oral diameter, and is a simple, solid, pointed spike. 



The wall is relatively thick, about o.i oral diameter, sub- 

 orally; toward the aboral end it becomes a little thinner. It 

 is hyaline, without traces of laminae, prismatic structure, or 

 surface markings of any sort. The cavity follows the outer 

 contour strictly, save that the horn is solid. 



Length, total 28 to 341^1, pedicel 3.1 to 6.2U; oral diameter, 

 18.8 to 1 9^1. 



Favella minutissima differs from all others of the genus 

 in size, general proportions, and form. Its lack of collar and 

 of prismatic structure sets it off from others. If it had cocco- 

 liths it would have been placed with Poroecus, perhaps near 

 Poroecus apiculatus, but its size and shape are different. The 

 presence of a collar would have suggested Craterella, but it 

 lacks this essentially diagnostic organ. Its place in Favella is 

 uncertain, and it awaits final disposition. Favella azorica, 

 the species most like it in the genus, has no clear-cut horn. 



Recorded from two stations (44, 75) in the Galapagos 

 region, in i pump and i net sample taken at 50 and 100 

 meters, respectively. Frequency, minimum. 



Temperature: pump sample 20?52, net sample i8?40. 

 Salinity: pump sample 34.86, net sample 35.47. Density: 

 pump sample 24.53, net sample 25.55. pH: pump sample 

 8.04, net sample 8.10. 



Type locality, station 75, 100 meters; latitude 14° 15' 

 south, longitude 92° 05' west. 



Favella septentrionalis, new species 



(Plate I, figure 12) 



The moderately large, trim lorica has a narrow collar, a 

 long bowl, and a blunt, clumsy aboral horn; its length is 

 3.5 oral diameters. The narrow collar with median con- 

 striction is approximately 0.08 oral diameter in width. It is 

 outwardly concave, and its margin is slightly recurved 



