179 



f. typica Fosl. mscr. 



f. conceptaculis sporangiferis hemisphæricis vel fere hemisphæ- 

 ricis, creberrimis, diametro a superficie visis 250 — 350 fi. 



f. sublævis Fosl. mscr. 



f. superficie læviore; conceptaculis sporangiferis depresso-he- 

 misphæricis, subcrebris, diametro a superficie visis 300 — 400 /*. 



Syn. Melobesia Lenormandi Le Jol. Alg. Mar. Cherb. p. 151; sec. spee. 

 „ ,, Kleen, Nordi. Alg. p. 11. 



„ ,, Farl. Mar. Alg. New Engl. p. 181; ex parte? 



„ „ Batt. Mar. Alg. Berw. p. 139; sec. spee. 



Lithophyllum ,, Soims-Laub. Corall. p. 15. 



,, ,, Hauck 1. c. p. 267; saltem ex parte sec. spee. 



Kjellm. N. Ish. Algfl. p. 136 (103). 

 ,, ,, Holm. et Batt. in Annals of Bot. p. 102. 



Rke. Algenfl. p. 32. 

 „ ,, Fosl. Contrib. I, p. 9; ex parte. 



Remark on the form of the spedes. The form that I appre- 

 hend as the typical is characterized by its conceptacles of sporangia 

 being very densely crowded over the whole frond except a broader 

 or narrower part of the peripherical portion, often so densely that 

 the roofs become angular, now and then two or three confluent. 

 They are hemispherical or subhemispherical, 250 — 350 //. in dia- 

 meter, and the upper part of the roof intersected with 25 — 35 

 muciferous canals, which partly are somewhat crowded, never 

 densely, partly and most frequently rather scattered. Towards 



remarks: ,,Bory de Saint- Vincent recueillit pendant 1'expédition de Morée, 

 sur les rochers du Cap Ténare, une production calcifiée qu'il considéra 

 comme un Polypier et qu'il signala comme tel dans une Notice sur les 

 Polypiers de la Grece. Cette Notice, assez courte d'ailleurs, est insérée 

 dans la partie consaerée å la Zoologie de 1'expedition scientifique de Morée". 

 It is written five years before Dr. Phi lip pi published his well-known paper 

 on the true nature of the Nullipores of older authors. Mr. Hariot has 

 examined the original specimen recorded by the name of Tenar ea (undu- 

 losa) Bo ry, and considers it the type of a species including L. cristatum 

 (Menegh.) and L. cråssum (Lloyd) as varieties. He farther remarks: 

 ,,Bory a encore décrit, dans le méme Mémoire, un Nidlipora Trochanter 

 qui n'est autre que le Lithothamnium byssoides créé par Philippi pour le 

 Nullipiora byssoides de Lamark". 



I cannot agree with Mr. Hariot to strike the name Lithophyllum. 

 Before Philippi proved the Nullipores really to be plants, they were ap- 



