TJic U ppcr Palaeozoic Fossils of Missouri. — Rozvley. 353 
This is a much stouter coral than either A. loiigi or A. gracilis but 
near to the latter, except in its manner of growth. The colonies are 
always found surrounding stem joints of crinoids, especially Platy- 
crinus and, sometimes, as in the type specimen, between two stem 
joints, pushing them apart and surrounding them. The tubules are 
rather large, short and little expanded at the orifices. 
Stem joints of Platycrinus are often found in the Burlington lime- 
stone with from two to four or five conical holes reaching almost or 
quite to the center of the stem and sometimes showing remnants of a 
tubular form filling each hole. Is this our Aulopora? 
This species comes from the base of the Upper BurHngton 
hmestone, at Lotiisiana, Mo. 
EXPLANATIOX OF PLATE XXVIII. 
LopJwblastus conoideus, n. so. 
Fig. I. Type specimen. Side view X2. 
Fig. 2. Ventral view of another specimen, showing the anal opening 
and the ten small, round spiracles x2. 
Fig. 3. Side view of a specimen, more globose and with finer orna- 
mentation XI. 
Side view of a broad specimen apparently- granulo-striate xi. 
Side view of a young specimen, natural size. 
Lophohlastus inopinatus Rowley & Hare. 
Ventral view of a specimen showing the anal opening and the 
short slit-like spiracles x2. 
6 and 7. Side and ventral views of a specimen with a strong 
pentagonal outline at the top of the radials, natural size. 
An elongate specimen, side view, showing the shape and great 
hight of the anal hood. Natural size. 
LopJwblastus aplatus Rowley & Hare. 
Side view of a medium sized specimen, natural size. 
Side view of a larger specimen, showing ornamentation and 
the hight and shape of the anal hood, natural size. 
Ventral view of a specimen to show the anal opening and 
elongate spiracles, x2. 
Side view of the top of a specimen to show the hood and 
anal opening, x2. 
Lophohlastus rocvicri Shumard. 
Fig. 13. Side view of a medium sized specimen, showing the coarse 
character of ornamentation, natural size. 
Fig. 14. Side view of an elongate specimen with flat base, natural size. 
Lophohlastus marginulus, n. sp. 
Fig. 18. Ventral view cf a plump specimen, showing the central open- 
ing closed by a covering of small plates that extend out for a 
short distance over the ambulacra. Natural size. 
Fig. 19. Side view of the type to show the beautiful ornamentation, 
broad base and the expanded columnar disk or rim. Natural 
size. 
Fig. 
4- 
Fig. 
i; 
Fig. 
5. 
Figs 
Fig. 
8. 
Fig. 
9- 
Fig. 
10. 
Fig. 
II. 
Fig. 
12. 
