THE MARINE ALG.E OF NEW ENGLAND. 139 



fastigiate, apices much incurved, branches beset throughout with very 

 short incurved or recurved branchletSj cells in upper part scarcely as 

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

 ing a sharply defined band at the nodes; tetraspores and favellge? 



In eight feet of water. 



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



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

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

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

 strktum. 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 woukl have shown that the present is a form of some other species, but 

 when received from Mr. Young in 1875 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 IT. S. Fish 

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

 Reinsch, from Anticosti, 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^. 



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 sub terminal 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 genus 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 Ceramitos, 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 filaments 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 Ceramiacece, and in the Epicrisis of Agardh between the Dumontiaeea and the 

 Areschougiece. 



