64 ' NATURAL HISTORY BULLETIN 



central spine. Combs of ventral plates have two to four slender, 

 tapered, subequal, webbed spines, but mostly three. 



Furrow-spines are in convex combs of four or five slender, 

 webbed spines. Ventral plates are covered with a tough dermis. 

 Pedicellariffi are abundant, two-valved. Marginal plates small, 

 convex, regular, about equal, regularly paired; lower ones are 

 the more prominent. 



Panama. One dry specimen, presented by Capt. Dow (Yale 

 Univ. Mus. ) . 



Genus Asterinopsis Verrill. Type, A. penicillaris (Lam.). 



Asterinopsis Verrill, Revision AsterininEe, p. 480, 1913. 



This genus is peculiar in having a fascicle of slender spinules 

 on the ventral plates, instead of a fan-shaped group, which is 

 usual in the family. Pedicellariae are lacking. The dorsal and 

 marginal plates also bear fascicles of slender spinules. Adam- 

 bulacral furrow-spines are in regular combs. The principal 

 dorsal plates are lobed or cross-shaped. 



In addition to the type, which is Indo-Pacific, this genus in- 

 cludes the following two species. 



Asterinopsis pilosa (Perrier) Verrill. 



Asterina pilosa Perrier, Bull. Mus. Comp. Zool., vol. ix, p. 16, 1881; Nouv. 



Arch. Mus., vi, p. 219, pi. iii, fig. 8, 1884. 

 Asterinopsis pilosa Verrill, Eevis. Asterininae, p. 480, 1913. 



This species was described from a single six-rayed specimen; 

 radii 6'""' and 10'°'°. 



It is evidently very closely related to the A. lymani and may 

 not be distinct from it. As in the latter the ventral and dorsal 

 plates bear fascicles of elongated, slender spinules, appearing 

 silky. They agree in having six rows of papulae; four slender 

 spines in the furrow-combs; and in most other respects. Off 

 Dominica I., 118 fathoms, Blake Expedition. 



Asterinopsis lymani (Perrier) Verrill. 



Asterinopsis lymani Verrill, op. cit., 1913, p. 480. 



Asterina lymani Perrier, Bull. Mus. Comp. Zool., vol. ix, p. 15, 1881 ; Nouv. 

 Arch, du Mus., vol vi, p. 219, 1884. 



