245 — 



In the specimens found in more sheltered places or in deep 

 sea the cells are larger, often cylindric and more loosely connected. 

 They are very like 

 the figures 11 and 12 

 of Kuckuck. The 

 small lens -cells are 

 here more seldom. 



As mentioned 

 above, f. Crustacea is 

 found in exposed loca- 

 lities growing on rock 

 and coral reefs at 

 about the surface of 

 the sea where it is 

 constantly at the 

 mercy of the waves; in such localities it can be found as rather 

 large crusts covering the rocks. On the other hand, f. typica when 

 growing in shallow water is found in more sheltered localities or 

 in deep sea down to a depth of about 30 meters or more. 



The species is common at the shores of the islands. 



Fig. 3. Valonia utricularis (Roth) Ag., 

 f. Crustacea Kuck. 



A little part of tbe plant pictured in fig. 2. It shows the ar- 

 rangement of the small lentiform cell along the walls of the 

 cells. (70:1). 



Yalonia Ægagropila G. Ag. 



C. Agardh, Species Algarum , p. 429. J. Agardh, Till Algernes Syste- 

 matik, VIII, Siphoneæ, p. 99. Kützing, Spec. Algarum, p. 507; Tab. Phycol. 

 vol.6, tab. 87; fig. 1. P. Kuckuck, Über den Bau und die Fortpflanzung von 

 Halicystis Aresch. und Valonia Ginn. (Bot. Zeit. 1907). 



Valonia utricularis forma Ægagropila Hauck, Meeresalgen, p. 469. 



The West Indian plant seems to agree very well with the 

 forms from the Mediterranean as described by Kuckuck. I have 

 only found small lentiform cells and they were very seldom : those 

 I have seen had a short and broad rhizome, very like the clamps 

 described later in Struvea. The West Indian form agrees for the 

 rest very well with the specimens pictured by Kuckuck, I.e., fig. 18. 



As already pointed out in mentioning Valonia macrophysa , it 

 is only from the observations of Kuckuck that I consider this 

 plant as a special species and not as a form of Valonia utricularis 

 as Hauck has done. 



This species occurs in shallow water in a locality sheltered by 

 coral reef on the south coast of St. Croix; it was found here abun- 

 dantly lying loose on the sandy bottom between sea-grasses. The 



