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Show 1906.] ON CYCLOPIA IN GSSEOUS FISHES. 443 PLATE XXVIII. Fig. 1. Spongodes zanzibarensis, sp. n. End of a branch. X 20. p. 424. 2. Spongodes crosslandi, sp. n. X 20. p. 423. Figs. 3-9. Wrightella variabilis, sp. n. To show variations in colour. X 1*6. p. 431. Fig. 10. Wrightella erythrcea Gray. X 1*5. p. 430. PLATE XXIX. Fig. 1. Leptogorgia ochracea, sp. n. p. 431. 2. Sclerophytum viride, sp. n. Nat. size. p. 420. 3. „ „ Group of polyps. X 8._ 4. Suberogorgia kollikeri, var. zanzibarensis, n. X 1*5. p. 429. Figs. 5-7. Lophogorgia crista Mobius. X 2. p. 432. Fig. 8. Sympodium splendens, sp. Q. X 12. p. 409. 9. Sympodiion punctatum May. X 2. p. 408. PLATE XXX. Fig. 1. Siphonogorgia intermedia, sp. n. One polyp. X 14. p. 428. 2. „ „ Four branches. X 2. 3. Clavularia pregnant, sp. n. X 12. p. 407. 4. Clavularia fiava May. X 10. p. 402. 5. Sympodium fuscum, sp. n. p. 408. 6. Clavularia crosslandi, sp. n. X 10. p. 404. PLA.TE XXXI. Fig. 1. (a) (b) (c). Cozlogorgia repens, sp. n. Nat. size. p. 436. (d). „ „ Enlarged portion. X 12. 2. Sclerophytum polydactylum Dana. X 3. p. 418. 3. Stereonephthya zanzibarensis, sp. n. Colony. Nat. size. p. 425. 4. M „ Portion enlarged. X 16. 5. Spongodes kukenthali, sp. n. X 16. p. 424. 3. On Cyclopia in Osseous Fishes. By JAMES F. GEMMILL, M.A., M.D. [Received February 20, 1906.] (Plate XXXII.*) I. Description ; p. 443. II. Summary of Anatomical Details: p. 447. III. Causation : p. 447. IV. Comparison with Cyclopia in Mammals: p. 448. I. DESCRIPTION. Some time ago I obtained from the Lochwinnoch Trout hatchery four young Trout just escaped from their egg-membranes, which exhibited the condition of cyclopia. As I could not find that the anatomy of this very interesting abnormality had previously been described in the case of any of the lower vertebrates, I examined the specimens carefully in the hope that some light might be thrown on cyclopia in the higher forms. Classification.-The condition of the central nervous system * For explanation of the Pale, see p. 449. |