101 



The capituliim of my specimens was very flabby, loose and 

 large, surpassing many times the rather short stalk in length. 

 Thus in one specimen the stalk was only two cm. long, while the 

 capitulum reached a length of seventeen cm., being about 16 cm. 

 broad, and another specimen had a 3 cm. long stalk and a capi- 

 tulum 16 cm. high and nearly the same breadth. The propor- 

 tionally few fdaments are very long and wide apart, spreading 

 to all sides ; their diameter reaches 500 — 600 ,«. 



This form I call forma expansa. 



It is found: St. Thomas, in the sea to the west of Water Island 

 at a depth of about 30 meters, near Thatch Cay at the same depth (leg. 

 Dr. Th. Mortensen). St. Jan: OfT America Hill (30 meters). 



Geogr. Distrib. West Indies, Florida. 



Udotea Lamx. 



1. Udotea conghithiata (Ellis S: Solander) Lamx. 



Lamouroux, Hist. Polyp, flex., 1816, p. 312. Howe, Phycological 

 Studies IV, p. 96 (Bull. Torr. Bot. Club, vol. 36, 1909), A. & E. S. Gepp, 

 The Codiacese of the Siboga Expedition, Monographic LXII, 1911, p. 114, 



Corallina conglutinata Ellis et Solander, Nat. Hist. Zoophytes, 1786, 

 p. 125, pi. 25, fig. 7. 



Only a few specimens of this species have been found. The 

 largest specimen was about 7 cm. high, the flabellum 5 cm. and 

 6 cm. broad, another had a total length of about 5 cm. and the 

 flabellum of about 4 and 7 cm. broad. It is found growing in 

 loose sandy or muddy bottom in sheltered places in shallow water 

 and in open sea in deeper water at a depth of about 5 fathoms. 



It is only found at St. Croix: Buck Island, off Frederikssted, 

 Krauses Lagoon. 



Geogr. Distrib. West Indies, Florida. 



2. Udotea cyathiformis Decsne. 



Decaisne, Memoire sur les Corallines ou Polyp, calcif. (Ann. Sci. Nat., 

 2. ser., t. XVIII, 1842, p. 106). Howe, Phycological Studies, IV, (BuU. Torr. 

 Bot. Club, 36, 1909, p. 96, pi. 3 and pi. 8 figs. 8—10. A. & E. S. Gepp, The 

 Codiacese of the Siboga Expedition, Monographic LXII, 1911, p. 117, 

 figs. 2, 6, 9. 



Udotea conglutinata Vickers, Phycologia Barbadensis, 1908, p. 24, pi. 

 XXXII. 



Of this species I have a rather large collection. The largest 

 specimen is about 13 cm. high, the flabellum alone 10. As pointed 

 out by Mr. & Mrs. Gepp the flabellum when typically developed 



