Mr. H. J. Carter on the Hexactinellida3. 359 



Rosette many-rayed ; rays of equal length, straight, capitate 

 (fig. 6). 



Myliusia Grayi, Bowerbank, St. Vincent. (6) 



Species tubular, unbranched, closed at the extremity. 



Rosette many-rayed : rays of equal length, sigmoid, clavate, 

 and dentate outwards, claw-shaped, flexed and grouped en fleur- 

 de-lis (fig, 11, a^h) ; or with rays of equal length, straight and 

 pointed (fig. 4) ; or occasionally with straight rays, few, and 

 terminated by three or more spines at the free ends laterally 

 (fig. 14). 



Provided with long anchoring-spicules of two kinds, viz. 

 smooth and spiniferous ; the latter terminating in an inflated 

 head with several recurved spines arranged uniformly all round 

 (PI. XIV. fig. 5), or on one side of the head only (fig. 4) ; ter- 

 mination of the smooth spicule unknown. 



Eiqjlectella asi^ergillum^ Owen. Philippines. (7) 



Species tuhidar, hranched ; brandies closed at their free extremities ; 

 wall tJiick, formed of pohjhedrally reticulated fibre. Possessing 

 a scopidine shaft. 



Rosette [small) with elongated shaft-like axis, many-rayed : 

 rays straight, pointed or capitate, thorn-like, chiefly situated 

 in the middle and at the terminations of the shaft, arranged 

 more or less verticillately (fig. 19) ; or [large) with microspined 

 rays slightly curved and not capitate (fig. 20). 



Scopuline shaft headed with four rays of equal length, 

 slightly everted, microspined, and terminating in small glo- 

 bular heads (PI. XV. fig. 2). 



A2Jhrocallistes heatrix^ Gray. Malacca. (8) 



Rosette many-rayed : rays of equal length, straight, capitate 

 (figs. 6 & 7) ; or with long shaft-like axis, like that of the 

 '■^smalV form in A. heatrix^ with or without heads (figs. 17 

 & 18). 



Scopuline shaft headed with four rays of equal length, flexed 

 outwards en fleur-de-lis^ microspined, and each terminating in 

 a large conical end (PI. XV. fig. 1). 



AphrocalUstes Bocagei^ Wright. Portugal. (9) 



? Equal in the young form to Lanugincllapupa^ Schmidt. (10) 



Species tubidar, branched; branches closed (2) at the free extremities ; 

 wall thin, formed of a single layer of suhrectangular lattice-like 

 fibre. Possessing a spino- capitate or vmbrella-lilce headed shaft . 



Rosette many-rayed; rays of equal length, sigmoid, capitate, 



