STYELA POMARIA. 113 



almost equally short, projecting, comparatively-wide 

 oviduct directed towards the ventral margin or atrial 

 space. Thus there are as many oviducts and male out- 

 lets as genital nodules. 



8. Styela sulcatula (Alder). 



(PL XXXVII, fio-s. 6 and 7 ; PI. XLII, figs. 8 and 9 ; 



PL. XLVIII, fig. 11.) 



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

 'p. 162. 



Body sub-cylindrical when extended, hemispherical 

 when contracted, attached by a broad base. Apa-tii r^* 

 terminal, on long tubes (about one-third the length of 

 the body), approximating at the base, and nearly dis- 

 appearing on contraction ; they are margined with 

 a red line or entirely crimson. Test dark reddish- 

 brown, rough with longitudinal and transverse furrows, 

 giving the surface a beaded appearance. Mantle 

 bright crimson or scarlet. Tentacular Ji laments linear. 

 Branchial xac with four folds on each side. OranVx 

 scarlet^ disposed in spherical masses over the inner 

 surface of the mantle. 



Lenijtli from half to three-quarters of an inch. 



Hcib. From a few fathoms to deep water, on Styela 

 talerosa. and the roots of Lamiiun-'ni . 



EXGLAND. Cullercoats, Northumb. (Alder). Seaham 

 Harbour, Durham (Hodge). 

 First recon/. Alder [1803]. 



The longitudinal sulcations of the test of this species 

 (PL XXXVII, figs. 6 and 7) are scarcely perceptible 

 in spirit specimens ; but the upper portions are much 

 contracted and consequently much wrinkled trans- 

 versely ; the inside is silvery white. 



The mantle, which is opaque and fleshy, is firmly 

 attached to the test. The tentacular filaments are 

 about forty; they are short (varying in size), delicate, 

 and nearly linear. 



n. 8 



