200 BULLETIN OF THE 
Deltocyathus Agassizii ۰ 
About 375 specimens were obtained, ranging in depth from 84 to 888 
fathoms. They can be classed into two varieties, equicostatus and calcar, pass- 
ing into each other through an intermediate one having the thicker primary 
coste of calcar, but no projecting spurs. Some of these appear to have had the 
spurs at one period of their growth, but not to have kept them when full grown. 
One specimen has the earlier stage decidedly of the calcar variety, and then 
suddenly has become equicostate for the rest of its growth. There is no de- 
cided preponderance of one variety over the other due to depth, but sometimes 
acast of the dredge brings only one variety, sometimes both in about equal 
numbers. Of the many hundred West-Indian specimens 1 have examined, none 
have shown any trace of adherence, even when so young as to have a diameter 
of but one or two millimeters, I regret that want of room prevents me from 
giving figures of a selection from numerous mutilated and mended specimens, 
showing that the genera Ecmesus Philippi, Hemicyathus Seguenza, and the 
Genus incerte sedis of Professor Duncan are nothing but similar individuals 
of Deltocyathus and sometimes of Diaseris. 
Station No. 36. Lat. 23° 1 N., Long. 89° 10 W. 84 fms. 
* — & 32, Lat. 23° 52 N., Long. 88? 5’ Wi 95 fms. 
(Sigsbee.) Off Havana, 100 fms. 
Off Sand Key, Fla. 111 fms. 
uk Lat. 26° 31’ N., Long. 85° 3’ W. 119 fms. 
di Off Havana. 158 fms. 
i Off Havana. 175 fms. 
n Lat. 22? 9 N., Long. 82? 21' W. 177 fms. 
Station No. 20. Lat. 23° 25’ N., Long. 83? 11^ W. 220 fms. 
Ji * 3. Off Havana. 243 fms. 
(Sigsbee.) Off Havana, 458 fms. 
Station No. 21. Lat. 23° 2 N., Long. 83° 11! W. 287 fms. 
s * 19. Lat. 23° 3' N., Long. 83° 10 W. 310 fms, 
{i * 2 Off Havana. 805 fms. 
" * 406, Lat. 25° 43’ N., Long. 84? 47! W. 888 fms. 
Paracyathus De Filippii D & M, 
Telegraph cable, off Sand Key, Fla. 45 fms. 
Off Havana. 80 fms. 
Station No. 32. Lat. 28° 52! N., Long. 88° 5/ W. 95 fms. 
E * 22. Lat. 23° 1' N., Long. 83° 14 W. 100 fms. 
m * 4b. Lat. 25° 33’ N., Long. 84? 21’ W. 101 fms. 
(Sigsbee.) Lat. 26° 31/ N., Long. 85° 3 W. 119 fma. 
Station No. 23. Lat. 23° 1 N., Long. 83? 14’ W. 190 fins, 
= * 2 Off Havana. 805 fms. 
