LKITOCLINUM ASl'KKTM. 45 



2. Leptoclinum asperum Milne Edwards. 

 (Plate LVIII, fig. 1, and fig-. 109 i n text.) 



a*/><'r/(iu MILNE EDWARDS Obs. Ascidies comp. 

 [1841], p. 82, [in Mem. Acad. Sci. List. France, XVIII 

 (1842),]). 298,] pi. viii, f. 3; [THOMPSON in "Rep. Brit. 

 Assoc. for 1848 (1844), p. 264, and in Ann. Nat. Hist. 

 (1) XIII (1844), p. 434;] FORBES & HANLEY Brit. Moll. I 

 [1848], p. 17 ; [CocKS in Rep. K. Cornw. Polyt. Soc. for 

 1849 (1850), p. 74;] THOMPSON Nat. Hist, Ireland, IV 

 [(1856), p. 362; NORMAN in Zoologist, XVIII (I860), 

 p. 7249; ANSTED & LATHAM Channel Isl. (1862), p. 219; 

 GTRUBE Insel Lnssin Meeresf. (1864), p. 59]. 



Colon;/ (PI. LVIII, fig-. 1) incrusting, coriaceous, 

 thin, rough with little conical papillae placed near to 



FIG. 109. Part of a colony of Leptoclinum asperwn. Enlarged. 

 (M. Edwards, pi. viii, f. 3 a.) 



or confluent with the branchial apertures (fig. 109) ; 

 colour dull yellowish white. In other respects resem- 

 bling the last species. 



Hah. Generally found associated with L. macn- 

 [On the roots of Lamina-rid digitata, Cystoseira 

 '*, etc. (Codes) J\ 



ENGLAND. [Falmouth, Cornwall ((.'<7,-x).] 

 IHELAND. North coast, [and Clew Bay, Mayo] 

 (Thompson^. 



CHANNEL ISLANDS. Guernsey (AM a-). 

 First rn'onL [Thompson, 1843.] 



Specimens from Gouliot Caves, Sark, presented to 

 us by Dr. Bowerbank show the distinct papillose 



