372 PROCEEDINGS OF THE AMERICAN ACADEMY 



288. CoRYNOMORPHA CLAVATA, Ag., Bidray. (Acrotylus clavatus, 

 Harv.) Key West. 



289. Prionitis lanceolata, Harv. West coast. 



*290. Prionitis Andersonii, Eaton. Santa Cruz, San Diego, 

 Cal. — I have specimens from Oregon collected by 3Ir. E. Hall, which 

 resemble the plate of Fucus crinitus (Turn. pi. 123). To this plate 

 Ruprecht refers in describing his Tlcltocarpus crinitis, a species recog- 

 nized by Agardh in his Bidrag till Florideernes Systematik, page 15, 

 and supposed by him to be related to Plkea and to be placed in the 

 Dumontice. Tichvcarpus bears a strong external resemblance to 

 Prionitis, and it is to be hoped that collectors on the west coast will 

 find fruiting specimens of the plant collected by Mr. Hall, that its 

 true position may be detenniued. 



291. Grateloupia Gibbesii, Harv. Charleston, S.C., and south- 

 ward. — Grateloupia Outhrim of Chili, which resembles this, is to be 

 expected in California. 



292. Grateloupia versicolor, Ag. California? 



293. Grateloupia filicina, Ag. Florida. 



294. Catanella pinnata, Harv. Key West. 



*295. Nemastoma ? Bairdii, n. sp. Frons vermifonnis, gelatinosa, 

 dichotoma ; axilloe acutaa, segmenta terminalia attenuata. Sporas non 

 vidi. Tetraspora) cruciatte solitarice ad geniculas rauiellorum cortica- 

 lorum. — Gay Head, Mass. 



Of this rare plant there is but one specimen known. This was 

 found by me washed ashore at Gay Head, and supposed, at the time, to 

 be a Nemalion. The genus Nemalion, however, has tripartite tetra- 

 spores, and our plant more properly belongs to Nemastoma, the nearest 

 allied species of which is N. verm.icularis. From this it differs by 

 beinsr dichotomons. 



296. Gloiosiphonia capillaris, Carm. Occasionally from Long 

 Island Sound to Cape Ann, Mass. 



SPYRID1A.CE^. 



297. Spyridia aculeata, Kutz. Florida. 



298. Spyridia filamentosa, Harv. Massachusetts Bay south- 

 ward. 



CERAMIACE^. 



299. Microcladia Coulteri, Harv. West coast, common. 

 *300. Microcladia Californica, n. sp. Frons compressa, de- 



composita pinnata. Pinnula; ultiraoa dichotomo-corymbosiE. Favellae 



