makim: alc..:: ui new England. Ill) 



in Cullitintinniiiti, luld t(»;;«'thor l>ya platiiums t'uvt'lopc The triclioiilioric aiiparatu.s 

 iiul the early sta;::t'sof tluMlfVi'lopiiuMit of thocvstocarps, howovcr, scarcely jlilViT in tho 

 two geuora. The Kpeeies of Spcrniittlnimn'unt have been considered nlatetl to f\'i(UiiiiHii, 

 btit if we are to rej^anl Jl\ jn'tiicilUita ha the type of the last-named ^^enns, as has been 

 done by Thnret and Hornet in Notes Al«;olo;;i(ines, tho resemblance is not clos*'. In spite 

 of the fact that the frnit o{ Spcnnothamiiion is not a trno favella, there is little doubt 

 that the «;enus should be placed in the CvnimUa', near CaUitbam»ion. The development 

 of the jjenns has been very thoroughly studied an«l has formed tho subject of several 

 admirable jiapers, amonj; which may be mentionetl Prin<;sheim's account of S. roHeolum, 

 in his IJeitni-je ziir Morpholoj^ie der Meeres-Al;;en ; Na^j^eli on5. rMnierJ and hemuiphro- 

 (litnm, in Beitriij^e znr Mori)holoj;io und Systomatik iler Ceramiaceie ; and Thuret and 

 IJornet on Spermotlmmuioii jlabtUatitm, in Notes Al;^olo<^i(iues. 



S. TUENEKI, Arescb. (CalUthamnion Turneri, A^^; Phyc. liiit., 1*1. 

 179; Xer. Am. Dor., Part III, p. 241.— 6'. roscolum, PriIl^^sll., 1. c. ?— 

 Herpothamnion Tumeric Na?^.) 



Froiuls Ibriniii.n- densely matted tufts, procumbent filaments branch- 

 in«r, attached by disk-like cells, vertical fdaments one to three inches 

 hij^h, simple or slightly branching, naked below, pinnate above with 

 opposite or sometimes alternate spreading pinnate branches, ultimate 

 branches long and slender, often ending in a hair j antheridia ovate or 

 cylindrical, sessile on the upper side of the branches j cystocarps involu- 

 crare, terminal on the branches; tetraspores tripartite, borne on the 

 upper side of the ramuli, either solitary and pedicellate or clustered and 

 sessile on short fastigiate branches. 



Var. VARIABILE, Ilarv. 



Branches and branchlets alternate or secund. 



In very dense tufts on algji? at low-water mark or in deep water. 



Common in Long Island Sound ; var. variabile, Boston, Br. Burkee. 



A species which is often found washed ashore in dense rjlobose tufts from our southern 

 limit to Nantucket. At tho latter locality it is often found in very larj^e <iuantities 

 washed from deep water by tho surf on Siasconsett Beach. The filaments are delicate 

 and of a pleasant lake color. North of Cape Cod tho species is hardly known with cer- 

 tainty. Si>ecimen8 collected at Xoank, Conn., have both tetraspores and y(»un«5 cysto- 

 carps on the same individual, but wo have never seen antheridia on American speci- 

 mens. Our plant seems to bo tho same as that fi^uretl by Prin^sheim under the name 

 of .S". roHcolum, and also corresponds closely to the species of that name in Al;^;e .Scandi- 

 navica*, No. K\. It api»ears without doubt to bo tlie C. Tunieri of the rhycolo;^ia Bri- 

 tannica an<l the Nereis, but we are unabh* to say whether it is the true ('. romoliia of 

 Agardh. 



Suborder CKKAMIEiE. 



Fronds lilamentous or compressed, either monosiphonous or with a 

 more or less corticated monosijilionous axis ; antheridhi in sessile tufts 

 or patches or in a series of whorls ; cystocarps (favelhx*) comi>oscd of 

 spores arranged without onlerand surrounded by a gelatinous envelope, 

 naked or involucrate. 



