94 PROCEEDINGS OP THE AMERICAN ACADEMY. 



Chondrds, Stack. 



C. canaliculatus, Grev., Alg. Brit., lv. (1830). Spha'erococcus 

 canaliculatus C. Ag. Spec. I, 260 (1822). — Albemarle Isl. : Iguana 

 Cove, Snodgrass & Heller. Further distr. West coast of S. Am. 



A single specimen which can be referred to this species. There are a 

 few specimens which may perhaps belong to this species but they cer- 

 tainly are not normal. They have the structure of the frond and the 

 sporidia of Chondrus, but, in the absence of cystocarps, there is a possi- 

 bility that they may belong to the genus Iridaea. Their habit, how- 

 ever, is that of Chondrus, but the fronds are occasionally perforate, 

 which may however be accidental rather than normal. 



Corallina, Lamx. 



?C. Berterii, Mont, in Harvey,. Ner. Austr. ii. 103 (1858), & Fl. 

 Chili, viii. 318. — Albemarle Isl.: Elizabeth Bay, Snodgrass & 

 Heller. Further distrib. Chili. 



Much covered with parasites and not in favorable condition to be 

 determined. 



Dasta, C. Ag. 



D. Stanfordiana, nov. sp. 



Frons cylindrica, ad 15 cm. longit., basem versus 1.25 mm. latit., 

 irregulariter composito-pinnata, usque apicem dense corticata, ramis 

 superne elongatis, ramellis subaequalibus, brevibus, circa 32 mm. longit., 

 vestitis. Ramelli monosiphonii, spiraliter inserti, unilateraliter cymosi, 

 cellulis 56 /x X 28^, cellula terminali conica, inter ramificationes bi- 

 cellulis. Stichidia primum ovato-lanceolata demum cylindrico-apiculata, 

 168 /a X 28 /x bene evoluta, sporidiis 20-seriebus et ultra ordinatis, cel- 

 lulis pericentralibus 5-8. Color roseo-purpureus, substantia gelatinosa. 

 Chartae arete adhaeret. — Wenman Isl.: Dec. 21, 1898, Snodgrass & 

 Heller. Albemarle Isl. : Turtle Pt., March, 1899, Snodgrass & 

 Heller. 



A species resembling D. pacifica, Harv. in its long stichidia but 

 differing in its long slender habit quite unlike that of D. arbuscula 

 J. Ag. to which D. pacifica bears a strong resemblance and in its 

 branches densely corticated to the apex. In the authentic specimen of 

 D. pacifica which I have examined the pericentral cells were easily seen 

 at some distance from the apex, whereas in D. Stanfordiana they can be 

 seen only at the extreme tip on account of the thick cortex. The mon- 

 osiphonous ramelli and the exposed sporangia agree with those of Dasya 



