132 Puget Sound Marine Sta. Pub. Vol, 1, No. 12 



PLATE 23 



33. Frond-utricle forked at the end. X7.'5. 



3-i. Utricle with young gametangia appearing. X75. 



35. Young utricle, still terminal, with gametangium. X75. 



36. Terminal utricle with long mucron, and adjacent older one with 

 short mucron. X75. 



37. Frond-utricle with a younger one growi'ig from the end. X75. 



38. Utricle with young gametangium. X7.'5. 



S9. Utricle bearing three gametangia in various stages of development, 



not all on the same level. X75. | 



40. Utricle bearing a mature gametangium with contents rounded up, 

 mature plug in the base, and tip opening. X75, 



