Freeman : OBSERVATIONS ON CONSTANTINEA. 177 



carps. Since no new observations nor collections of the arctic 

 species are cited, his generic description of the cystocarp is 

 probably based upon Constantinea reniformis, the Mediter- 

 ranean species. The cystocarps are described as " kalidia in 

 media fronde numerosa, clausa, disruptione partis ambientis 

 demum liberata, nucleolis pluribus composita ; nucleoli intra 

 periderma gelatinosum hyalinum gemmidia, nullo ordine dis- 

 posita foventes." The zonate division of the tetraspores is 

 noted. The collections of C. reniformis cited are : In the Ad- 

 riatic sea on the shores of Dalmatia (Meneghini ! and Zanar- 

 dini!) and in the Mediterranean sea at Cette (Salzman !) and 

 at Marseilles (Solier!). Nothing new is added concerning C. 

 sitchensis and C. rosa-marina, but C. reniformis is fully dis- 

 cussed. The latter had been collected also by Mertens and de- 

 scribed by him under the name of Kalymenia reniformis. In 

 1822 it was described by Agardh * under the name of Haly- 

 mcnia reniformis, and Postels and Ruprecht f describe it as a 

 third species of Constantinea C. reniformis. In 1822 J. 

 Agardh \ stated that the tetraspores of C. reniformis had not 

 been found. 



Harvey's description of Constantinea in 1858 is based upon 

 the observations and literature cited above. The similarity in 

 structure and the difference in external form and in position of 

 tetraspores is noted. The branching of the stipe is described 

 as at first irregular but later dichotomous ; the dichotomy, how- 

 ever, is often lost in the abortion of one branch. 



In 1862 in a notice of a collection of algae made by Dr. 

 David Lyall at Vancouver Island in the years 1859-1861, by 

 W. H. Harvey || specimens of Constantinea sitchensis with torn 

 laminse which were probably six to eight inches in diameter 

 when perfect were reported " adrift on the beach at Victoria 

 harbor." And Harvey observes that "perhaps this is only a 

 luxuriant state of Constantinea rosa-marina." 



In Kiitzing's work of 1867^ the genus is again described un- 

 der Neurocaulon and N. foliosum and N. rosa-marina are 

 mentioned. The work of Postels and Ruprecht is not cited. 



* Agardh. Spec. Alg. 201. 1822. 



t Postels and Ruprecht. 111. Alg. 17. 1840. 



% Agardh, J. 1. c. 



Harvey, W. H. Nereis Boreali-Americana 2 : 173. 1853. 



[ Harvey, W. H. Journ. Proc. Linn. Soc. Bot. 6 : 172. 1862. 



I Kiitzing. Tab. Phyc. 17 : 24. pi. 8$. 1867. 



