ii 7 



appear to be identical with U. cyathiformis in almost every character except the possession 

 of a cyathiform frond. And, since they occur in the same geographical region as, and in asso- 

 ciation with, that species, it seems impossible to exclude them from U. cyathiformis. For 

 instance, n° 99 of Mazé's Algues de la Guadeloupe in Herb. Mus. Brit. has a plane, narrow, 

 cuneato-flabelliform frond, while the specimens under the same number in Herb. Kew are 

 evidently cyathiform. There are also in Madame Weber van Bosse's herbarium five spirit 

 specimens collected at Santa Marta, Columbia, by Dr. Versluys, all of vvhich have a purely 

 explanate frond with rotundate base, and which, but for their geographical origin, we should 

 place without hesitation under our East Indian species, U. explanata (see remarks under that 

 species, p. 121). 



For distinguishing such flabelliform plants from U. conglutinata the most trustworthv 

 characters are the thin, flexible, fissile, fibrous frond, usually destitute of fibulae at base; the 

 less frequent dichotomies of the frond-filaments ; and the truncate or button-like apices of the 

 lateral appendages of the stipes. 



As regards their diameter, the frond-filaments of U. conglutinata are rather variable ; 

 for instance, in Dr. Howe's n" 3240 (fig. 44) from the Bahamas (the type locality) they vary 

 from 30 to 50 u. in diameter, while those of the ancient specimens of the Rev. Mr. Clp:rk in 

 Herb. Sloane vary between 38 and 54 a in one plant and 45 to 70 a in another plant. This 

 latter, though exceptional, is an undoubted U. conglutinata, with typical habit and a fibular 

 coating on the lower part of the frond. 



The size of the frond-filaments is thus an insufficiënt character for the separation of 

 U. conglutinata from U. cyathiformis. For in U. cyathiformis there is a group of plants in 

 which the diameter of the frond-filaments varies between 35 and 50 rj.. 



The lateral appendages of the stipes of U. conglutinata seem to be more variable in 

 shape than those of U. cyathiformis, bearing apices which range from dactyline (fig. 46) to 

 short, obtuse, or truncate, simple or bifid, in groups of two, 10 — 20 p. thick (rarely 30 y.), 

 not capitate. 



Udotea conglutinata is recorded only from the tropical A.tlantic. 



5. Udotea cyathiformis Decaisne 



Mém. sur les Corallines 011 Polyp. Calcif. in Ann. Sci. Nat. 2de sér. tom. XVIII. 1842 p. 106. 

 Syn. Udotea acetabulum Decaisne MS. in Herb. Mus. Paris. 



Udotea cyathiformis Kutzing Species Algarum 1849. p. 503. 



Udotea conglutinata Harvey Nereis Bor. Amer. III 185S p. 27. pi. XL. C (probably). 

 Flabellaria conglutinata Mazé et Schramm Algues de la Guadeloupe. Ed. II. 1870 — JJ. p. 88. 

 Udotea conglutinata Dickie in Journ. Linn. Soc. (Bot.) XIV. 1874. p. 312 (pro parte), and 



P- 3 I 5 (P ro parte). 

 Codium infundibulum Suhr ex J. G. Agardh Till Alg. Syst. V. 1887. p. 71. 

 Udotea infundibulum J. G. Agardh loc. cit. 



Udotea conglutinata Murray in Journ. of Bot. XXVII. 1889. p. 238 (pro parte). 

 Udotea cyathiformis Murray op cit. p. 239. 

 Udotea infundibulum Ue Toni Syll. Alg. I. 1889. p. 507. 

 Udotea cyathiformis De Toni op. cit. p. 512. 

 Udotea conglutinata Vickers and Shaw Phycologia Barbadensis. Paris 190S p. 24, pi. XXXII. 



