120 BRITISH TUXIOATA. 



the tubes being coated with sand like the rest of the 

 body, and very partially retractile. 



13. Styela comata (Alder). 



(PI. XXXVII, fig. 14 ; PL XXXIX, fig. 8 ; PI. XLIII, 



figs. 2 and 3 ; PI. XLVIII, fig. 16 ; and figs. 



70 and 71 in text.) 



Cynthia ampulla FORBES & HANLEY Brit. Moll. I [1848], 

 p. 40 ; ALDER & HANCOCK in Trans. Tyneside Nat. Field 

 Club, I [1848], p. 197 ; [OWEN in Encycl. Brit. ed. 8, XV 

 (1858), p. 331]. 



Non Ascidia ampulla BRUGUIERE [Hist. Nat. Vers, I (1789)] . 



Cynthia comata ALDER in Ann. Nat. Hist. (3) XI [1863], 

 p. 163, [and in Nat. Hist. Trans. Nortlmmb. Durh. I 

 (1865), pp. 6, 11]. 



Bod ij unattached, oblong ovate, flask-shaped. Aper- 

 tures terminal and approximated, forming elongated 

 tubes of nearly equal length, generally prettily blotched 

 and spotted with red, and retractile. Test (PI. XXXVII, 

 fig. 14) very thin, soft, transparent, and nearly colour- 

 less, set with long tufted hairs and covered with a thick 

 coating of sand. Tentacular filaments linear, simple. 

 Branchial sac (PI. XLIII, fig. 2) with four folds on 

 each side. Ovaries (PL XLIII, fig. 3, and fig. 71 in 

 text) extending over nearly all the internal surface of 

 the mantle in small ovate or pyriform masses. 



Length a little above an inch. 



Hob. Deep water. 



ENGLAND. Cullercoats, Northumb. ; from the fishing 



boats, not uncommon (Alder). [Durham (Alder, 1865).] 



First record. Forbes & Hanley, 1848 ; [cull. Alder]. 



Styela comata is remarkable for the thick coating 

 of sand with which it is always invested, sometimes 

 increasing it to double the natural size. Tliis arises 

 from the great length of the glandular hairs, and is 

 especially the case in old individuals, in which they 

 are much branched and become thickened at the base, 



