No. 466] VARIATION IN TEREBRATALIA. 693 


PLATE I. 
Fic. 1 — The type specimen of Terebratalia transversa Sowerby. rg from pl. 16, 
oc. London, 
6, in “ A Monograph on Recent Brachiopoda,” Davidson, Trans. Linn. 
ser. 2, vol. 4 
Fic. 2.— sche view ei a opines " hes same dip from Wingham Island, Alaska, 
l holes of the pedicle valve. Natural 
B5 t 
a impressions are much more faintly marked than the figures indicate. 
n in Fig. 2, showing the great irregularity in the grow 

1 ok 
sho wing the 

Fic. 3.— Side view of specimen se 
of the shell. Natural size. 
1 
h : a E "n 1 
e e pv 

Fic. 4. Interior of brachial 
ess and the large dental sockets. Natural si siz 
Fic. 5.— Interior of pedicle valve of same s specimen eo the heavy character of the shell 
about the umbo “er the largeteeth. Natural sı 
