Plate IV. 



Fig. 32. Transverse section of the gasterozooid at its base near its transition into the stolons in Stylastcr 

 gemmascens. 3%. 



33. Longitudinal section of the dactylozooid in Stylastcr gemmascens. 3/,. 



34. Transverse section of a dactylozooid in Pliobothrus symmetricus. ^/ I . 



35. Median longitudinal section of a very young gonophore (<?) in Stylaster norvcgicus. 45o/,. 



36. Median longitudinal section of a young gonophore (c?) in Stylaster roscus. 450/j. 



37. Median longitudinal section of an unripe gonophore (c?) in Stylaster norvegicus. 3o/ t . 



38. Median longitudinal section of two gonophores (c?) in Stylaster norvcgicus. The larger with 



spadix partially atrophied contains spermatocytes in process of transformation to sperma- 

 tozoa. 'S /,. 



39. Median longitudinal section of a gonophore (c?) in Stylaster roseus; the spermatocytes in process 



of transformation to spermatozoa. '3 /!. 



40. Transverse section of a young gonophore (c?) in Pliobothrus symmetricus. ^/ l . 



41. Median longitudinal section of a gonophore (J 1 ) in Pliobothrus symmetricus. 3/j. 



42. Median longitudinal section through apex of the fully developed gonophore in (c?) Pliobothrus 



symmetricus. SQO^. 



