( SOBS \Ki \< i 



shaped, very Long, equal in diameter throughout, reticulated, 



clothed with pellucid hairs scattered, Hart). .-. 



Bd. 2. p. L3. (A CLAS, PL MIL Fig. 52.) 

 Asperococcus pusillus, Carm. 

 Huh. Parasitical on Chordajilum, Annual. Summer. Ooi 



all round the coast. 

 The old Fronds of Chordajilum are frequently inf< 

 towards the close of Bummer, with the parasite here figured, 

 which changes them into Bhaggy ropes, sofl and slippery to 

 the touch. When placed in water the innumerable thread- 

 like fronds of the tdtosiphon stand out from the Chorda, 

 and spread in all directions round it, like the hairs 

 bottle-brush, ks 8 genus it seems to come nearesl t 

 tyosiphon, from which it obviously differs in having an un- 

 branched frond. 



50. Laminariae (Th* Laminaria Litosiphori); frond- Btel 

 tufted, Bhort, cylindrical, blunt. Blightly tapering at the base, 

 smooth (or hairy toward the apex), transversely banded, 

 the hands close tog< ther ; Bporea scattered, « >r Beveral in each 

 transverse band, Harv. Man, ed. 2. p. 48. | A 1 1.\>, PL XIII. 

 Fig. 53.) 



Desmotrichum Laminarise, Ktz. Bangia Laminariss, Lyngb. 



Asperococcus? Lamiiiarise, ./. Ag. 

 Hob, Atlantic shores of Britain. Parasitical on the fronds of 



Alarm esculenta, common on that plant in the Bummer and 



autumn. Annual. 



This poor little plant has been sadly tossed aboul among 

 botanists from one pari of the system to the other, nor is 

 \ ery certain whether it will be allowed to Lear the 

 name unaer which it i> now described, or whether that 

 must he changed into Desmotrichum. Should it he found. 

 on comparison, t<> agree in structure with the other species 

 so named, our genus Litosiphon, which has been formed to 

 include the present plant ami the Asperococcus pusillus, 

 Carm., must probably be given up. 



Oedkb :>. CHORD AKTAi /:./:. 

 WVI. CHOEDABIA. 



51. flaerelliformis (The whip ( hordaria); frond Bubsimple, fur- 



nished with closely-set, long, simple, filiform branches ; 

 muli very Pew or none : filaments of the periphery club- 

 shaped, the termina] cellule large or small] . L2. 



(Atlas, PL Ail. Fig. 17.) 



