460 Dansk Botanisk Arkiv, Bd. 3..Nr. 1. 



Cryptonemia J. Ag. 



52. Cryptonemia crenulata J. Ag. 



J. Agardh, Nya alger från Mexico (Öfvers. k. Vet.-Akad. Forh. 1847, 

 p. 11, the note); Spec. Alg., vol. II, p. 225; Epicrisis, p. 163. Harvey, 

 W, H., Nereis Bor.-Am., part II, p. 184. Kützing, F., Tab. Phycol., vol, 19, 

 tab. 31. 



Pyllophora crenulata J. Ag., In Hist. Alg. Symbolæ (Linnæa, vol. 15, 

 1841, p. 18). 



Areschoug, j. E., Icones algarum, 1847, p. 1, tab. II. Kützing, Spec. 

 Alg., p. 791. 



Phyllophora denticulata Kiitz., Tab. Phycol., vol. 19, tab. 77. 



Two small collections have been found. One of them was 

 dredged in deep water and consists of small plants growing epi- 

 phytic upon a piece of coral. The plants have a small basal disc 

 and a very short stipe from which the thallus quickly broadens 

 out, the broadest part being somewhat over ^2 cm. broad. It is 

 several times subdichotomously ramified. The margin is some- 

 what sinuate and irregularly dentate. 



The other specimen was most probably growing in shallow 

 water. It is a larger plant with much broader thallus, more than 

 one cm. broad, and more proliferous and, on the whole, very ir- 

 regularly ramified. The margin is sinuate with larger and smaller 

 teeth s . 



Both specimens were sterile. 



St. Croix: near White Bay. St. Jan: near Rams Head (ca, 20 fathoms), 

 Geogr. Distrib. : West Indies, Brazil. 



53. Contarinia Magdæ Web, v. Bosse. 



54. Cruoriopsis spec, 



55. Peyssonnelia armorica (Crn,), 



56. — Dubyi Crn, 



57. — Boergesenii Web, v, Bosse. 



58. — Nordstedtii Web. v. Bosse. 



59. — simulans Web. v. Bosse. 



60. — conchicola Pice, et Grun, ? 



61. — polymorpha (Zan.) Schm, ? 



62. — rubra (Grev.) J. Ag. 



63. Hildenbrandia prototypus Nardo. 



64. Lithothamnion mesomorphum Foslie. 



65. — sejunctum Foslie. 



