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Didymocyrtis tetrathalamus

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Photo#: 356
Location: Gulf of California
Sample: VS-R-56, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 8, fig. 13. Test with two polar caps and incomplete outer mantle. Slide VS-R-56a, 1-3 cm. Bar is 100 µm. 
Photo#: 357
Location: Gulf of California
Sample: VS-R-92, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 9, fig. 1. Test with two polar caps and complete outer mantle. Slide VS-R-92a, 1-3 cm. Bar is 100 µm. 
Photo#: 358
Location: Gulf of California
Sample: VS-R-81, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 9, fig. 2. Test with four polar caps and double outer mantle, slide VS-R-81a, 1-3 cm. Bar is 100 µm. 
Photo#: 359
Location: Gulf of California
Sample: VS-R-71, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 8, fig. 12. Test with two polar caps and lateral spines but no outer mantle. Slide VS-R-71a, 1-3 cm. Bar is 100 µm. 
Photo#: 360
Location: Gulf of California
Sample: VS-R-56, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 8, fig. 11. Test with two polar caps but no lateral spines and no outer mantle. Slide VS-R-56b, 1-3 cm. Bar is 100 µm. 
Photo#: 361
Location: Gulf of California
Sample: VS-R-27, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 8, fig. 10. Basic cortical shell with spines at poles but no polar caps. Slide VS-R-27b, 1-3 cm. Bar is 100 µm. 
Photo#: 362
Location: Gulf of California
Sample: VS-R-71, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 8, fig. 9. Basic cortical shell, no spines. Slide VS-R-71a, 1-3 cm. Bar is 100 µm. 
Photo#: 363
Location: Gulf of California
Sample: VS-R-27, 1-3 cm
Photo by: Richard N. Benson

Comments:
Benson, 1966, pl. 8, fig. 8. Medullary shells viewed down polar axis of incompletely developed test. Slide VS-R-27b, 1-3 cm. Bar is 100 µm. 
Photo#: 364
Location: Gulf of California
Photo by: Richard N. Benson

Comments:
Benson, 1966, p. 196: Figure 10. Zygocampe chrysa1idium Haeckel. Diagram to illustrate the most completely developed form observed in the Gulf assemblage. OM1 and OM2, first and second outer mantles, respectively. 
Photo#: 481
Location: Gulf of California
Sample: VS-R-27
Photo by: Bjørklund & Benson

Comments:
Picture taken from slide VS-R-27b, 1-3 cm. Bar is 100 µm. 


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