Algae. 185 



covered near Quito by Lagerheim in 1889 and later observed by 

 him in other provinces of Ecuador as parasitic on the stems and 

 leaves of a species of Spilanthes, is now reported upon Ambrosia 

 artetnisiaejolia from North Carolina, an extension of ränge into 

 the North temperate zone. Its characters are briefly redescribed, in 

 advance of a more extended paper dealing fully with the question 

 of its development, morphology, physiology, and cytolog)^ Maxon. 



Howe, M. A., Phycological studies. IV. The genus Neomeris, 

 and notes on other Siphonales. (Bull. Torrey bot. Club. XXXVI. 

 p. 75—104. pl. 1—8. February, 1909; issued March 4. 1909.) 

 The subjects are treated under the follovving heads: 



A. The genus Neomeris. "In an attempt to determine the rela- 

 tionships of a peculiar Neomeris collected on Atwood Cay in the 

 eastern Bahamas and later on the Caicos Islands, it was found 

 desirable to see the material on which Neomeris dumetosa Lamour. , 

 the original species of the genus, attributed to the An tili es, was 

 founded." This led to a comparative study of these and other spe- 

 cimens from widely separated regions, resulting in a critical revision 

 of the genus, the results of which are here presented. Six species 

 are recognized, namely: Neomeris dumetosa Lamour., the type said 

 to be from the Antilles, other specimens from the Dutch East 

 I n d i e s ; N. van Bosseae Howe , sp. nov. , the t3^pe from Sikka, Flores, 

 Dutch East Indies; N. stipitata Howe, sp. nov., known only from 

 specimens collected at Singapore; N. muscosa Howe, from the Ba- 

 hamas; N. annidata Diekie, the original specimens from Mau- 

 ritius, of rather wide distribution in both hemispheres; and N. 

 Cokeri Howe (1904), known only from the Bahamas. Detailed descrip- 

 tions of these are given, together with a brief generic diagnosis and 

 a \^y to the species. Photographic illustrations of all 6 species at 

 natural size are presented, as well as a series of detailed drawings 

 illustrating a discussion of their minute anatomy and relationship. 



B. Two West Indian species of Acetahuhim of the polyphysa 

 section. Two new forms are described: Acetahuhim pKsillum Howe, 

 from Montego Bay, Jamaica (type), and the Bahamas; and A. 

 polyphysoides deltoideum Howe, forma nov., from the Bahamas; A. 

 polyphysoides (Crouan) Kuntze is also redescribed. All are illustrated 

 and discussed, as in the case of Neomeris. 



C. A new Halimeda. Halimeda lacrimosa Howe, sp. nov. is 

 described from the Bahamas. It is said to be a peculiar species, with- 

 out close afifinities among the species of the genus hitherto described. 

 It is illustrated at natural size and in its minute anatomy. 



D. Udotea conglutinata and Udotea cyathiformis. These 2 West 

 Indian species which have commonly been merged, partially on 

 account of the descriptive name of the latter, are held to be distinct. 

 Photographic illustrations of both are here presented, together with 

 descriptions and a key which includes the more important diagnostic 

 characters. The characters of the stipe-cortex are illustrated b}^ 

 drawings, these being regarded as especialty reliable in determining 

 occasional forms whose relationships might otherwise appear some- 

 what doubtful. 



E. A new Bahaman Udotea. Description of Udotea spinulosa 

 Howe, sp. nov., from Bemini Harbor, Bahamas, Howe 3272 

 (type). This is very fully illustrated and compared with U. Palnietta 

 which is supposed to be its nearest ally. In this connection the latter 

 species is redescribed at length. Maxon. 



