S'S" The unit cell is a square box with tunnels to the top and bottom of the box and to the vertical edges. The box cannot be a cube; this shows the maximum height box in which the surface exists. For lower boxes, two surfaces exist, one with a narrower neck top and bottom and one with a wider neck. Genus 4. Evolver file: SSadj.fe

P Schwarz' P surface, included here for reference. The unit cell is a cube, and tunnels extend to each face. Genus 3. Evolver file: pcell.fe

S'S"P This surface can be viewed as S'S" with Ptype tunnels coming out of the top and bottom necks. Actually a 1parameter family in the ratio of the sizes of the necks. Genus 6. Evolver file: pssadj.fe

H'T This surface may be viewed as narrow tunnels to the sides of a hexagonal prism, with wide tunnels to the top and bottom. Genus 4. Evolver file: HTadj.fe

H"R This surface may be viewed as narrow tunnels to the vertical edges of a hexagonal prism, with wide tunnels to the top and bottom. Genus 5. Evolver file: HRadj.fe

T'R' This surface may be viewed as a central body with tunnels to the sides of a hexagonal prism, and those tunnels merged vertically. Genus 6. Evolver file: TRadj.fe

H'TH"R A hexagonal prism with narrow tunnels to both vertical faces and vertical edges. Ratio of sizes of necks can be varied. Genus 8. Evolver file: HRHTadj.fe

T'R'H'T A central body in a hexagonal prism with tunnels out to the vertical faces, and those tunnels connected vertically. Or T'R' with catenoid holes punched through certain places. Ratio of sizes of necks can be varied. Genus 9. Evolver file: HTTRadj.fe

H"RT'R' A central body in a hexagonal prism with tunnels out to the vertical edges, and those tunnels connected vertically. Ratio of sizes of necks can be varied. Genus 10. Evolver file: TRHTadj.fe
