540 



CYLINDRCECIID.E. 



Anguinella palmata. 



It requires a keen and practised eye 

 to detect it in the muddy situations in 

 which it chiefly delights ; and, indeed, 

 without a previous knowledge of its pe- 

 culiarities it is pretty sure to escape 

 observation or to be passed by as a weed. 

 The cells are rendered very dark-coloured 

 and opaque by the large quantity of earthy 

 matter imbedded in their walls. They are 

 generally curved slightly inwards towards the stem ; they 

 are not contracted at the base, and have rather the appear- 

 ance of processes of the branch than of distinct cells. 



Habitat. On shells, dead or living, stones, &c., between 

 tide-marks, especially in muddy situations and in shallow 

 water. 



Localities. Eiver Deben, Suffolk, abundant on oyster- 

 shells; Tenby, caves in St. Catherine's Isle, sparingly 

 (Busk) : Filey, between tide-marks (T. H.) : Ilfracombe 

 (Allman). 



Geographical Distribution. Ostend, very abundant, 

 especially in autumn (Van Ben.) : Charleston, South 

 Carolina (Dr. Harvey) . 



Doubtful Species. 



NoLELLA STIPATA, GoSSC. 

 NoLELLA STIPATA, Gosse, Mar. Zool. ii. 21, fig. 38. 



Zooecia erect, subcylindrical, crowded on tubes which form 

 an undefined incrusting mat. Polypide with 18 ten- 

 tacles. 



Probably referable to Cylindrcecium. 



