SIPHONACE^. 21 



reduced to mamillseform tubercles, the upper more perfectly formed, ellipsoidal, saclike, 

 and mucronulate. The branch, including its ramenta, is not more than a line in 

 diameter. The substance is rather rigid, and is horny when dry. The colour is dull 

 green, inclining to olivaceous. 



I have much doubt whether this plant, which was originally described and figured by 

 Turner, be permanently distinct from the following, of which it has very much the habit, 

 but from which it differs, at least in typical specimens, by the more numerous rows of 

 the ramenta and their more ellipsoidal shape. Specimens however vary in both these 

 respects, and I could be well content to unite both forms under one specific name. 



Plate XXXIX. A. Fig. 1. Caulerpa ericifolia, the natural size. Fig. 2, small 

 fragment of a branch with its ramenta. Fig. 3, a ramentum ; the latter figures 

 magnijied. 



8. Caulerpa cupressoides, Ag. ; surculi robust, naked and glabrous ; frond shortly 

 stipitate, irregularly much branched ; branches scattered, once or twice compounded, 

 set with short, conoidal, mucronate, sub-bifarious or bifarious ramenta. Ag. Sp. Alg. 1, 

 p. 441. Chauvinia cupressoides, Kiitz. Sp. Alg. p. 497- Trevis. I. c. p. 137- Fiicus 

 cupressoides, Esper. t. 161. Turn. Hist. t. 195. (Tab. XXXIX. B.) 



Hab. Key West, with the preceding. Prof. Tuomey. (v. v.) 



Except in the less imbricated, di-tristichous, and shorter ramenta, this species does not 

 differ from C. ericifolia. But these characters are variable. If the two species be united, 

 the name cupressoides, as the older, must be preserved. Both forms are natives of 

 the West Indies, and of the Pacific Ocean. C. ericifolia was first brought from 

 Bermuda ; and C. cupressoides from St. Croix. 



Plate XXXIX. B., Fig. 1. Caulerpa cupressoides, the natural size. Fig. 2, apex 

 of a branch with tristichous ramenta. Fig. 3, portion of another branch with disti- 

 chous ramenta. Fig. 4, a ramentum ; the latter figures magnified. 



9. Caulerpa paspaloides, Bory. ; surculi robust, naked and glabrous ; fronds with a 

 long naked stipes, flabellately branched, the branches once or twice forked, or simple, 

 fastigiate, densely beset in 3 or 4 ranks, with plumose, patent or recurved ramenta ; 

 ramenta sub-bipinnate, pinnae opposite turned to one side, subulate or mucronulate, 

 mostly pectinated with similar mucronulate pinnules on their inferior sides. Chauvinia 

 paspaloides, Bory, Coq. p. 205, tah. 23, fig. 1. Kiitz. Sp. Alg. p. 500. Trevis. 

 in Lin. 22, p. 13?. Caulerpa Wurdemanni, Harv. MS. — Var. yS; ramenta simply 

 pinnate, the pinnae very long and straight, destitute of pinnules. 



Hab. Key West, abundantly. Dr. Wurdemann, W. H. H., Prof. Tuomey, Mr. 



