ILLUSTRATIONS • 



(All drawings are from camera lucida outlines. Plate I, fig. 1, is from a drawing by 

 T. Espinosa; all other figures are from drawings by the author.) 



Plate I 



Fig. 1. A typical hydranth of Eudendrnon griffini sp. nov. with 2 immature 

 male gonophores. X 15. 



2. A female hydranth with gonophores, showing the shortening of the 



fertile female hydranth. X 21. (Tentacles indicated.) 



3. A female hydranth with 2 relaxed gonophores, showing the ova, 



incased in mesoglcea, hanging down beside the pedicel. (The 

 upper portion of the hydranth is not shown.) X 48. 



4. An atrophied female hydranth, showing 2 ova attached to the per- 



isarc of the pedicel. The spadix of 1 gonophore remains attached 

 to the hydranth, the other has disappeared, x 48. 



Plate II 



Fig. 1. The upper portion of a median longitudinal section through one 



side of a normal hydranth of Eudendriu-m griffini with extended 

 hypostome. X 47. 



a, hypostome. e, gland cell. 



6, large nematocyst. /, tentacle. 



c, nucleus. g, mesoglcea. 



d, zooxanthella. h, vacuoles. 



2. A few cells from the distal portion of a longitudinal section of a 



tentacle. X 172. 



a, nematocyst. c, zooxanthella. 



b, the extremely thin ectoderm layer, d, nucleus of endoderm cell. 



3. A few cells from near the distal end of the hypostome, seen in 



longitudinal section. X 307. 



a, ectoderm. e, vacuoles. 



6, mesoglcea. /, nucleus. 



c, large nematocyst. g, granular material. 



d, zooxanthella dividing in four. 



4. A few cells from the wall of the hydranth in longitudinal section. 



X 172. 



a, ectoderm. c, nucleus. 



b, zooxanthella. 



5. Portion of a longitudinal section through the region of the sense 



ring. X 172. 



a, nucleus, d, groove of sense ring. 



6, zooxanthella. e, enlarged glandular ectoderm cells 



c, nematocyst. of the sense ring. 



6. A longitudinal section of a male gonophore of 1 chamber. X 78. 



a, sperm. c, nematocyst. 



b, zooxanthella. 



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