ACTINOMETRA IOWENSIS 



A New Unstalked Crinoid from the Florida Reefs 



By Frank Springer 



Through the courtesy of Professor C. C. Nutting, I have 

 recently had the opportunity to examine the magnificent col- 

 lections made by the Bahama Expedition of the State Univer- 

 sity of Iowa in 1893, under his direction. The extent and 

 variety of the material obtained, and the fine condition of the 

 specimens, elicited my warmest admiration, and I cannot 

 refrain from extending to Prof. Nutting and the ladies and 

 gentlemen of his party, my sincere congratulatios upon the 

 extremely valuable contribution to science made by them. 



Among the Echinoderms there is a remarkable form of the 

 Comatulid genus Actinometra, found in the shallowest water 

 yet recorded for any crinoid. It seems to differ very decidedly 

 from all other described species, and it was thought advisable 

 to publish a preliminary notice of the occurrence in advance 

 of the description now given. This was done in the American 

 Geologist for August, 1902. With the permission of Prof. 

 Nutting, I have proposed for it the name Actinometra iowcn- 

 sis, in commemoration of the extremely successful marine 

 expedition sent out under the auspices of the University. 



ACTINOMETRA IOWENSIS, 11. sp. 

 Plate I — Figs 1-6. 



A large species; with long, slender arms, having a spread of 

 about 27 cm. Disk 20 mm. Color in alcohol, brown. Cen- 

 trodorsal rather small, with basal star visible; bearing around 

 the margin about 30 stout cirri, composed of 12 to 18 ossicles. 



