BHODYMENIACEAE. 517 



form it is slightly suggestive of conditions of Caulerpa racemosa (both occur 

 under one name in the Linnaean herbarium), but the Chrysymenia is red, 

 unless decelerate, while the Caulerpa is green. The plant is commonly 3 to 8 

 inches tall and the subglobose, obovoid, or occasionally subpyriform hollow 

 vesicles that form the ultimate branchlets are mostly 1A 3 lines long. The 

 American plants appear to be larger in all respects than those of the Adriatic 

 and Mediterranean seas. This species occurs in Harrington Sound and in 

 Castle Harbor. (Alg. Exs. Am. Bor. 150; Phyc. Bor.-Am. 1933.) It usually 

 inhabits rather deep water. 



Chrysymenia pyriformis B0rg. resembles the foregoing, but is a smaller 

 plant (1-2 inches high) with vesicles that are larger (J-f inch long; and more 

 uniformly pyriform. It has been found at Tucker 's Town by Collins. 



Lomentaria uncinata Menegh. [Hooperia Baileyana (Harv.) J. Ag.] is a 

 hollow, thread-like, irregularly branched plant, sometimes slightly resembling 

 Cordylecladia irregularis, but is deeper red and always softer, more gelatinous, 

 and adheres firmly to paper on drying. It is also usually more slender and. 

 delicate, its branches being mostly J to i of a line in diameter. Its longer 

 branches or axes are often arched or recurved, with the branehlets in a more 

 or less secund series on the convex side. Both the generic position of the 

 American plant and its identity with the little-known Adriatic and Mediter- 

 ranean species with which it is currently associated have been called in ques- 

 tion and both points deserve further study. The plant has been found at 

 Hungry Bay by Collins and in the Walsingham region by Hervey. 



Cliampia parvula (Ag.) Harv. forms subglobose tufts 1-4 inches in 

 diameter on Tlialassia, Zostera, the larger algae, and on rocks. Its main axes 

 are mostly i-4 a line in diameter and its branches are irregularly and variously 

 disposed, being alternate, opposite, or sometimes whorled. The plant is ob- 

 viously jointed-nodose throughout, the barrel-shaped internodes in the older 

 parts being mostly 1A times as long as broad; microscopic examination shows 

 that the internodes are hollow, with a septum or diaphragm at each node. The 

 plants are somewhat gelatinous and adhere firmly to paper on drying, yet they 

 do not collapse when taken from the water. The species has been found in 

 Harrington Sound. (Phyc, Bor.-Am. 1934.) 



Coelarthrum Albertisii (Pice.) B0rg. has a jointed, hollow, septate thallus, 

 somewhat like that of Champia, but the branching is- dichotomous, the constric- 

 tions are deeper, the internodes or segments are more ellipsoid or obovoid, and 

 the consistency is more gelatinous. It is also, so far as known, a smaller plant, 

 attaining a height of scarcely more than one inch, with broader segments, these 

 mostly 1-3 lines broad. The type of the species was from the Canary Islands. 

 It seems that the species was first found in Bermuda by Farlow who got it in 

 1881 at Ducking Stool near Hamilton and at Cooper's Island. Hervey has 

 since found it at Buildings Bay (Phyc. Bor.-Am. 2091) and at Bailey's Bay. 



Family DELESSERIACEAE. 



Nitophyllum Wilkinsoniae Collins & Hervey (Phyc. Bor.-Am. 2037) is a 

 recently published species apparently related to N. ocellatum (Lamour.) Grev. 

 It was found growing on rocks below low-water mark at Dingle Bay. Endemic. 



