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"Transverse section of an Alcyonarian zooid. mm, Mesenteries; mb, muscle banners; sc, sulcus; st, stomodaeum." — The Encyclopedia Britannica, 1910

Alcyonarian

"Transverse section of an Alcyonarian zooid. mm, Mesenteries; mb, muscle banners; sc, sulcus; st, stomodaeum."…

The left cerebral hemisphere, from a fetus in the early part of the seventh month of development. Labels: p.c.s., sulcus praecentralis superior; p.c.i., sulcus praecentralis inferior; r1, lower part of Rolandic fissure; r2, upper part of Rolandic fissure; p1, inferior postcentral sulcus; p3, ramus horizontalis; p4, ramus occipitalis; e.p., external perpendicular fissure; t1, parallel sulcus; S, Sylian fossa; F.P., fronto-parietal wall; F.,frontal wall, O., orbital wall.

Brain of Fetus

The left cerebral hemisphere, from a fetus in the early part of the seventh month of development. Labels:…

Gyri and sulci, on the outer surface of the cerebral hemisphere. Labels: f1, sulcus frontalis superior; f2, sulcus frontalis inferior; f.m., sulcus frontalis medius; p.m., sulcus paramedialis; A, pars basilaris; B, pars triangularis; C, pars orbitalis; S, Sylvian fissure; s1, anterior horizontal limb (Sylvian fissure); s2, posterior horizontal limb (Sylvian fissure); p.c.i., inferior praecentral sulcus; p.c.s., superior praecentral sulcus; r, fissure of Rolando; g.s., superior genu; g.i., inferior genu; d, sulcus diagonalis; t1, superior temporal sulcus (parallel); t2, inferior temporal sulcus; p1, inferior postcentral sulcus; p2. superior postcentral sulcus; p3, ramus horizontalis; p4, ramus occipitalis; s.o.t., sulcus occipitalis transversus; c.m., callosomarginal sulcus; c.t.r., inferior transverse furrow.

Gyri and Sulci on the Brain

Gyri and sulci, on the outer surface of the cerebral hemisphere. Labels: f1, sulcus frontalis superior;…

The gyri and sulci on the mesial aspect of the cerebral hemisphere. Labels: r, fissure of Rolando; r.o, rostral sulcus; i.t, incisura temporalis.

Gyri and Sulci on the Brain

The gyri and sulci on the mesial aspect of the cerebral hemisphere. Labels: r, fissure of Rolando; r.o,…

The gyri and sulci on the tentorial and orbital aspects of the cerebral hemispheres.

Gyri and Sulci on the Brain

The gyri and sulci on the tentorial and orbital aspects of the cerebral hemispheres.

"Diagrammtic longitudinal section of an Anthozoan zooid. m, Mesentery; t, Tentacles; st, Stomodaeum; sc, Sulcus; r, Rotteken's muscle; s, stoma; lm, Longitudinal muscle; d, diagonal muscle; go, gonads." —Encyclopedia Britannica, 1910

Anthozoan Zooid

"Diagrammtic longitudinal section of an Anthozoan zooid. m, Mesentery; t, Tentacles; st, Stomodaeum;…