674 SUMMARY OF CURRENT RESEARCHES RELATING TO 



121 from tropical America, all belonging to the section Patulfe, and 

 52 of these he describes in full. There are 27 new species. 



Petalophyllum Ralfsii.* — S. Sommier, who previously discovered 

 the rare British hepatic Petalophyllum Ralfsii in the Tuscan island 

 Pianosa, has found it again on the mainland of Italy between Monte 

 Argentaro and Orbetello, being led to search for it closely through 

 noticing that the soil and plants (especially Ophioglossum lusitanicum) 

 were just such as conceal the jilant on the island of Pianosa. 



Siamese Hepatics.f — F. Stephani describes four new hepatics and 

 names thirteen other species collected in the island of Koh Chang in 

 the Gulf of Siam by the Danish expedition (1899-1900). 



Riella cultivated from dried Mud.f — M. P. Porsild describes a 

 new species of hepatic — Riella Paulsenii, cultivated from spores in 

 dried mud brought from brackish lakes in Bokhara in central Asia, two 

 years previously. The genus is remarkable for its submerged existence, 

 its structure, rarity, and distribution. The author institutes a new sub- 

 genus, Trabutiella. 



Hepatics of Puerto Rico.§ — A. W. Evans describes fully and 

 figures the four species of Leptolejeunea found in the island of Puerto 

 Kico. These are minute and epiphyllous. The author carefully com- 

 pares the genus with its ally Drepanolejeunea and brings out the points 

 of difference. He includes an account of the vegetative reproduction. 



Priority of the Name Calypogeia. |] — E. Levier discusses the 

 history and systematic values of the debated generic names Calypogeia 

 Raddi (1818), Kavtia [or Kantius] S. E. Gray (1821), Cincinnulus Du 

 Mortier (.1822), and Gongylanlhus Nees (1836). Appealing to Raddi's 

 clear description and figures of the original species Jungermannia caly- 

 pogeia in 1808 — the earliest demonstration of a subterranean marsupioid 

 perichfetium in a hepatic, he claims this species to be the type of 

 Eaddi's genus Calypogeia, under the later name C. fissa Eaddi (1818), 

 and approves Nees' transference of Raddi's two other species to Gongy- 

 lanthus. As to Kantia Gray and Cincinnulus Du Mort., he finds them 

 to be unwarranted, though the former was revived by Lindberg — on 

 inadequate grounds. 



Algae. 



Coccospheres and Coccoliths.^f — H. Lohmann publishes the results 

 'of his researches on these organisms and adds much to what had pre- 

 viously been known on the subject. His paper is divided into six 

 sections, preceded by a general introduction. Section I. deals with the 

 history of Coccolithophoridas, as the group is here termed, with the litera- 

 ture and views already published ; it is divided into several subsections ; 

 II. deals with the structure of the cell and of the two coverings, gelati- 

 nous and calcareous ; III. the reproduction and development ; IV. the 



* Bull. Soc. Bot. Ital., 1902, p. 73. 



t Bot. Tidsskr., xxiv. (1902) pp. 277-80. 



X Tom. cit., pp. 323-7 (3 figs, in text;. 



§ Bull. Torr. Bot. Club, xxix. (1902) pp. 49G-510 (3 pis.). 



|| Bull. Soc. It;i)., 1902, pp. 92-8. • 



f Arch. f. Protistenkunde, i. (1902) pp. 89-165 (3 pU). 



