28 SOLORINA SACCATA. 



lated broad rim. This neck has a screw spiral, as well as longitu- 

 dinal striae. The posterior end has a very short, abrupt, cylindri- 

 cal tube, and the beautiful striae which connect this with the neck 

 are closely set, and each usually continues from one pole to the 

 other. We cannot concur in the view that this is a variety of 

 Lagena sulcata, but append the remarks of H. B. Brady, F.R.S., 

 hereon at foot.* 



Lagena clavata is smooth, fusiform, or soda-water-bottle 

 shaped, with a long neck and milled rimf at aperture, either 

 obtuse or acute at posterior extremity ; frequent. One specimen 

 was found finely striated from end to end (distinct from L. gracilis). 



Lagena gracillima, a fine, tapering, distomous variety of 

 last, lanceolate ; both ends accuminate. 



Soloiina Saccata* 



By Arthur J. Doherty. 

 Plate 5. 



THE name Solorina represents a genus of Lichens belonging 

 to the IVth. Natural Order — Peltideace^ — of Schoeren 

 and to Leighton's Illrd. Family, Lichenacei. The 

 genera Solorina and Feltigera closely resemble each other in the 

 method of evolving the apothecium, which is at first covered by 

 several layers of cells similar to those constituting the thallus ; 

 this " thalline veil " gradually dehisces, and ultimately disappears. 

 Solorina saccata is found growing upon the earth in moist, 

 shady spots, in sub-Alpine or elevated regions especially on lime- 

 stone rocks. We found it in a most flourishing condition last 

 May at Miller's Dale, Derbyshire, at which place we are unable to 

 ascertain that there is any record of its having been previously 

 discovered. The thallus is of a leathery or paper-like consistence, 



* " I have given up L. Lydlil as a quite useless name. Wlien the specimens 

 really differ from L. stilcata, they are the first joints of Nodosaria scalaris, var. 

 separans. Norman suggested this to me years ago, but I was long in arriving at 

 any conviction about it." 



t Pointed out by J. S. Wright, F.G.S., Belfast. 



