BRACHIOPODA. 391 
Animal with the mantle-lobes firmly adhering to the shell, 
and united to the epidermis, their margins distinct, and fringed 
all round ; branchial veins giving off numerous free, elongated, 
narrow loops from their inner surfaces; visceral cavity occupy- 
A 
\ 
Uf} 
= 
ZY 
\\ 
\\ 
Tj, 
] TN 
H 
A\WSY \\\ LS 
Wik 
WM” 
Fig. 202. Dorsal.* Fig. 203. Ventral. Fig. 204. Ventral. 
Lingula anatina, Lam. (original). Syn. Patella unguis, L. (part.) 
aa, anterior adductors ; a', posterior adductor; p », external adjustors ; p'p’, central 
adjustors; rr, anterior retractors (the anterior occlusors of Hancock); r'7'r', posterior 
adjustors; c, capsule of pedicle; 2, visceral sheath; 0, cesophagus; s, stomach , 
7, liver ; z,intestine; v, vent; 0, branchial vessels ; m', mantle margin ; m, inner lamina 
of mantle margin retracted, showing bases of sete; s, sete. 
ing the posterior half of the shell, and surrounded by a strong 
muscular sheath; pedicle elongated, thick; stomach long and 
straight, sustained by inflections of the visceral sheath; intes- 
tine convoluted dorsally, terminating between the mantle-lobes 
on the right side, oral arms disposed in about six close whorls, 
their cavities opening into the prolongation of the visceral 
sheath in front of the adductors. 
Obseryations on the living lingula are much wanted; the 
oral arms probably extended as far as the margins of the shell; 
and the pedicle, which is often nine inches long in preserved 
specimens, is doubtless much longer, and contractile when 
* In Fig. 202 a small portion of the liver and visceral sheath have been removed, to 
show the course of the stomach and intestine. In some specimens the whole of the 
viscera, except a portion of the liver, are concealed by the ovaries. In Fig. 204 the 
front half of the ventral mantle-lobe is raised, to show the spiral arms; the black spot 
in the centre is the mouth, with its upper and lower lips, one fringed, the other plain. 
The mantle-fringe has been omitted in Figs. 202, 204. 
