1906.] ox CYCLOPIA IN OSSEOUS FISHJIS. 443 



Plate XXVIIl. 



Fig. 1. Spnngodes zanzibarensis, sp. n. End of a branch. X 20. p. 424. 



2. SjJOHffodes crosslaiidi, sp. n. X 20. p. 423. 

 Y\gi.Z-'d. Wrightella variabilis, iT^.Ti. To show variations in colour. X 1'5. p. 431. 

 Fig. 10. Wrightella erythrcea Graj-. X I'o. p. 430. 



Plate XXIX. 



Fig. 1. Tieptogorgia ochracea, sp. n. p. 431. 



2. Scleroj>hytum viride, sp. n. Nat. size. p. 420. 



3. „ „ Group of polj'ps. X 8. 



4. Suberogorgia kolliJceri, var. zanzibarensis, n. X i'o. [i. 429. 

 Figs. 5-7. Lophogorgia crista Mobius. X 2. p. 432. 



Fig. 8. Sympodium spleyidens, sp. n. X 12. p. 409. 

 9. SympodiiuH puuctaUun Maj'. X 2. p. 408. 



Plate XXX. 



Fig. 1. Siplionogorgia intermedia, sp. n. One polyp. X 14. p. 428. 



2. „ „ Four branches. X 2. 



3. Clavularia pregnans, s-p. n. X 12. p. 407. 



4. Clavulariajlava May. X 10. p. 402. 

 6. Sympodium fuscutn, sp. n. p. 408. 



6. Clavularia crosslandi, sp. n. X 10. p. 404. 



Plate XXXI. 



Fig. 1. {a) {b) (c). Coslogorgia rejoens, sp. n. Nat. size. p. 436. 



(d). „ „ Enlarged portion. X 12. 



2. Sclerophytum polydactylum Dana. X 3. p. 418. 



3. Stereonephthya zanzibarensis, sp. n. Colon}'. Nat. size. p. 425. 



4. „ „ 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. 



1 1. 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, S'.'O p. J-JO. 



