1 8 James A. Grieg. [No. 2. 
Fig. 48. Section of a polyp from the base of the tentacles. 
» 49. Section of a polyp through the gullet: the polyp is 
somewhat contracted. 
» 50. A portion of the gastral cavity, with sep ta and ova 
(section). 
» 51. Section of the ciliated groove (siphonoglyphe). ep. epi- 
thelium of the gullet, en. entoderm, s. septa. p. Flagelli- 
form cells of the ciliated groove. (Zeiss. Oc. II. Obj. F.) 
» 52. Longitudinal section of a tentacle. b. connective-tissue 
with spicules. en. entoderm, ep. ectoderm. m. muscle- 
fibre. (Zeiss. Oc. I. Seibert homog. immer. Vs-) 
» 53. Longitudinal section of a polyp. (Zeiss. Oc. I. Obj. AA.) 
» 54. Section of the basal part, at the base of the polyp. g. 
Bottom of the gastral cavity, with septa and 2 ova. h. 
Main ducts. e. Fine nutritory ducts. s. Spicules. (Zeiss. 
Oc. I. Obj. A A.) 
» 55 — 61. Spicules of the cell. 
» 62 — 66. Spicules of the polyp-body. 
» 67—73. Spicules of the tentacles. 
All the spicules are drawn with, Zeiss. Oc. I. Obj. D D. 
