of the Subfamily Asterinince. 485 



are many much smaller ones, of varying form and size, mostly 

 rounded or elliptical. All the dorsal plates are entirely and evenly 

 covered with crowded, minute granules, or granule-like blunt 

 spinules. The plates in the inter radial areas become more reg- 

 ular, polygonal or roundish, closely compacted, thin, and rest 

 on the summits of polygonal tubes, having a honeycomb-like 

 appearance, in miniature, when the plates are removed. On 

 the radial and central areas, and also on the ventral side, there 

 is a short tube or cell under each plate, limited below by the 

 underlying thin membrane, producing an alveolate structure. 



Papulae are small and stand singly, in several ill-defined 

 radial rows. 



The adambulacral spines form a strongly webbed fan of three 

 or four unequal spines on each plate, and an outer rounded 

 cluster of four or five rather stout spinules, webbed together. 

 The ventral plates, toward the center, have an irregular group 

 of three to six webbed spines; toward the margin these become 

 more regular and finally form transverse combs of about three 

 on each plate. Jaw-spines form a regular rounded comb of 

 about six on each side, webbed together. 



Locality uncertain ; received in a lot containing Chilian star- 

 fishes, such as Heliaster helianthits, and Meyenaster* gelatin- 

 osus (Meyen) Ver., but without a label. (Mus. of Yale Univ. ; 

 one, dry.) 



* Meyenasler is proposed as a new genus, with this species as the type. It 

 is monacanthid ; has one interactinal row of plates, and a reticulated dorsal 

 skeleton, with numerous papular areas and one or three rows of stout spines. 

 The type is six-rayed ; another species is five-rayed. 



Am. Jour. Sci.— Fourth Series, Vol. XXXV, No. 209.— May, 1913. 

 34 



