428 PROCEEDINGS OF THE NATIONAL MUSEUM vol.89 



J^otes. — One of the specimens from locality III (E.5739) is 

 6-rayed. 



OPHIOCTEN SERICEUM (Forbes) 



Localities.— \\\ (E.5751, E.5819). IV (E.5745). V (E.5743). 

 IX (E.5863). XI (E.5872). XII (E.5856). XXI (E.5711). 

 XXII (E.5838). XXV (E.5840). XXVI (E.5835). XXVII 

 (E.5833, E.5839). XXIX (E.5710). Two hundred and twenty-one 

 specimens. 



Notes. — One of the two specimens from locality V (E.5743) has 

 the disk 18 mm. in diameter and the arms about 35 mm. long. 



ASTEROIDEA 



PTERASTER MILITARIS (O. F. Muller) 



Localities.— 1 (E.5816). IX (E.5850). Two specim.ens. 

 Notes. — The specimen from locality IX (E.5850) has K=50 mm., 

 r=20 mm. 



HEISTRICIA SANGUINOLENTA (O. F. Muller) 



Locality.— XK (E.5721). One specimen. 



CROSSASTER SQUAMATUS (Doderlein) 



Plate 58 



Localities.— Ill (E.6828). IX (E.5848, E.5849). XII (E.5851). 

 XXIV (E.5702). Five specimens. 



Notes. — In one of the specimens from locality IX (E. 5848) the 

 rays are 10 in number; R=55 mm., r=23 mm. The abactinal 

 skeleton is a wide-meshed reticulation of narrow bands in the inter- 

 spaces of which are isolated rounded noncontiguous plates of various 

 sizes. All the plates except the smallest bear spines, those on the 

 smaller plates arising from slight elevations, those on the larger 

 plates arising from high stout elevations v/ith a hemispherical sum- 

 mit. The best developed paxiliae have a central group of 13-15 

 long spines up to 4.3 mm. in length surrounded by a single or 

 partially double row of 25-31 much shorter spines webbed at the 

 base; a few spines of intermediate length are usually present. 

 There are all gradations between these large paxiliae and the paired 

 or single small spines of the small plates. As the paxiliae become 

 smaller the long central spines decrease in length and stoutness 

 and approacli tlie peripheral spines in character. In a typical small 

 paxilla there are 12-15 spines, the longest not more than one-third 

 as long as the longest spines of the large paxiliae, all of the same 

 character, evenly graduated, the longest central about twice as long 



