1916 Hurdj on Codium 119 



"Codium mucronatum. J. G. Agardh, 1886, p. 43. Frond cylindrical, more 

 or less regularly dichotomously fastigiate, surface more or less roughish ; 

 utricles cylindric-clavate, 5-10 diam. long, terminating in a distinct mucro. 



"As described by Agardh, this species is divided between three 

 varieties, with no definite typical form ; it seems to take a place in the 

 Pacific the same as that occupied by C. tomentosum in the Atlantic, and 

 it is probable that most, if not all reports of the latter from the Pacific 

 really refer to this species. 



"Var. Calif ornicum J. G. Agardh, 1886, p. 44, pi. 1 , fig. 3; P. B. A. 

 No. 229. Utricles in younger parts of the frond cylinderical, ending 

 in a very acute mucro ; in the older parts clavate, with a blunter mucro. 

 Fig. 144. Alaska to Mexico. 



"Var. Novae Zelandiae J. G. Agardh, 1886, p. 44. Utricles in younger 

 parts subcylindrical, with a short mucro; in older parts clavate, mucro 

 wanting or very inconspicuous. Vancouver. New Zealand. 



"In var. Calif ornicum the mucronate utricles are so well developed 

 that the surface of the frond appears, even to the naked eye, not so 

 smooth as that of C. tomentosum. In var. Novae Zelandiae they are much 

 less noticeable, and some care is required to distinguish this variety from 

 C. tomentosum." 



Setchell (17) states that specimens from Sitka, Alaska; from San 

 Juan Harbor (Port Renfrew), Strait of Juan de Fuca, Vancouver Island, 

 B. C; and from Whidby Island, Port Townsend, and Ludlow Bay, Wash- 

 ington, are Codium mucronatum f. Calif ornicum J. Agardh ; continuing, he 

 says that "in all probability are to be included here, the specimens re- 

 ferred to C. tomentosum as follows: Norfolk Sound (Sitka Sound) and 

 Nootka Sound, Turner (1811, p. 135, under Fucus tomentosus) ; Esqui- 

 malt, B. C, Harvey (1862, p. 176)." For Codium mucronatum f. Novae 

 Zelandiae, he gives a specimen collected by Miss Butler and Miss Policy 

 at Port Renfrew, B. C, and makes the following observations: "A care- 

 ful study of C. mucronatum will probably show a very decided variation 

 in the size and occurrence of the mucronate tip of the utricle. In the 

 plants included under the preceding form, all studied by us have the 

 typical tip of the /. Californicum. In the plant quoted under the present 

 ^orm, the mucronate tip to the utricle is to be found only in the very 

 young portions of the frond. Below in the older })orti(nis, the utricles are 

 more or less swollen at the tip, as in C. Muellcri Kiitzing. and while some 

 of them show a very slight ajjiculus, the majority of them do not. The 

 plant certainly differs from the more usual form on the Pacific coast of 

 North America." 



In view of the fact that young utricles may be found with either 

 a long, acute mucron or a short one, on the same plant; and tliat in older 



