GASTEROPODA. 121 
rather convex ; the last whorl rounded towards the base, with an obscure encircling line 
placed a little beneath the middle of the whorl; aperture not exposed. 
Locality. Scarborough, Westow, and Whitwell; also in the Cornbrash. (PZillips.) 
SERPULA PLICATILIS, Goldf. Plate XIV, figs. 5a, 4, ¢. 
SERPULA PLICATILIS, Goldfuss. 1833. Petref., p. 229, t. 68, fig. 2. 
S. Testa laxd vel curvatd, lateribus subconvewis, leviusculis, costulis arcuatis per paria 
approximatis ; carind continud rectd. (Goldf.) 
Shell loose or unwound, irregularly curved, slender, rather convex, smooth; the sides 
have little, obscure, closely-arranged, curved coste, not visible upon the majority of 
specimens ; the dorsal carma is simple, continuous, but not much elevated or conspicuous. 
This minute species was gregareous, a considerable number being clustered upon a 
small Pecten. 
Locality. Scarborough. 
SERPULA stLcaTa, Sow. Plate XIV, fig. 6. 
SERPULA suLCATA, Sow. 1829. Min. Con., t. 608, figs. 1, 2. 
S. Testa sublavd aut curvatd, levi, subcarinatd ; carind dorsali levigatd ; sulcisque 
angustis carine approwimatis ; lateribus subplanis. 
Shell partially unrolled, curved, smooth; dorsal carina smooth, with a narrow sulcus 
on each side of it ; sides of the shell rather flattened ; lines of growth visible upon different 
portions of the surface. 
The mode of growth in this species appears to have been very irregular. In its young 
state it was flattened at the sides, but subsequently became much more rounded ; and the 
figure of the aperture is nearly orbicular. 
Locality. Scarborough. Inferior Oolite near Stroud. 
SERPULA INTESTINALIS, Phil. Plate XIV, fig. 7. 
SERPULA INTESTINALIS, Phil. 1835. Geol. of York., vol. i, p. 110, t. 5, fig. 21. 
S. Testa sublaxd, levi, compressiusculd, sulco leviter depresso, superne et inferne sitd. 
Shell smooth, partially unrolled, somewhat compressed above and beneath with a slight 
longitudinal sulcus in the middle of the two flattened sides. 
This species is destitute of a carina, nor are any lines of growth visible; the sulcations 
are only to be seen upon the unrolled portion of the shell. 
Locality. Bath Oolite, Scarborough ; also in Oxford Clay and Cornbrash, (PAzlips.) 
