THE MARINE ALG.E OF NEW ENGLAND. 139 



fastigiate, apices much incurved, branches beset throughout with very- 

 short incurved or recurved branchlets, cells in upper part scarcely as 

 long as broad, two to three times as long below, corticating cells form- 

 ing a sharply defined baud at the nodes; tetraspores and favellae? 



In eight feet of water. 



Canarsie, L. I., Mr, A. B. Young. 



This curious species has unfortunately never been found in fruit. We have only- 

 seen three specimens, which were all collected by Mr. Young. The largest was about 

 three inches high and the filaments were coarser than those of C. diaphanum and C. 

 strict inn. It is easily recognized by the numerous short incurved branchlets which 

 arise singly or in twos and threes at the nodes. It is possible that a large series of 

 specimens would have shown that the present is a form of some other species, but 

 when received from Mr. Young in 1675 it seemed so distinct that the name C. Youngii 

 was given to it, and under that name it was mentioned in the Report of the U.S. Fish 

 Commission for 1875, but without any description. The Hormoceras Capri-Cornu of 

 Reinsch, from Auticosti, judging from the plate and description in the Contributiones, 

 published in 1874-75, is apparently the same as C. Youngii, and the name of Reinsch 

 has the priority. 



Suborder SPYRIDIE.E. 



Fronds filiform, monosiphonous, formed of longer branching filaments 

 of indeterminate growth, from which are given off short, simple branches 

 of determinate growth, cells of main filaments corticated throughout, 

 the secondary branches corticated only at the nodes; antheridia borne 

 on the secondary branches, arising from the nodes and finally covering 

 the internodes ; tetraspores tripartite, borne at the nodes of secondary 

 branches ; cystocarps subtermiual on the branches, consisting of obovate 

 masses of spores in dense whorls around the central cell, with a pericarp 

 formed of monosiphonous filaments packed together in a gelatinous 

 substance. 



An order consisting of a single geuus and a small number of species, most of which 

 are tropical. The systematic position of the order is a matter of dispute. The fronds 

 resemble closely those of the Ceramiece, as do also the tetraspores, but the cystocarps 

 are peculiar and not closely related to those of any other order. A section of the ma- 

 ture fruit, which is usually either two or three parted, shows a monosiphonous axis, 

 around the upper cells of which the spores are arranged in irregularly whorled groups. 

 The whole is surrounded by a wall, which is formed by the union, by means of a jelly, 

 of the elongated tips of subdichotomous lilaments which arise from the cortical cells 

 of the nodes just below the sporiferous cells. The antheridia are first formed at the 

 nodes, but soon extend over the internodes for a considerable distance. The devel- 

 opment of the frond is fully given by Cramer, 1. c. In the Nereis the order is placed 

 next to Ccramiacew, and in the Epicrisis of Agardh between the Dumontiacew and the 

 Areschougiew. 



