REPORT OX THE HEXACTINELLIDA. 369 



Species 2. Malacosaccus unguiculatus, n. sp. 



Besides numerous oxyhexasters with fine straight or curved terminal rays, the 

 parenchyma contains discohexasters with three or four long and slightly curved terminal 

 rays on each principal. The terminal rays of the floricomes only exhibit two to three 

 strongly developed terminal claws. South of Sierra Leone, 2450 fathoms. 



Subfamily 3. T.egerin.e, F. E. S. 



The thin wall of the sack-like or tubular body is penetrated by parietal gaps of 

 irregular shape and distribution. The skeletal lattice-work of the wall usually forms an 

 irregular meshwork. Each projecting distal ray of the sword-shaped hypodermalia bears 

 u fioricome. 



Genus 1. Tsegeria, n. gen. 



With the single species, Taigeria pulchra, n. sp. 



A rigid sack-shaped liody firmly attached by means of a knotted base. Irregular 

 roundish parietal gaps. The superior round terminal aperture exhibits an external 

 wreath of short straight, and an inner crown of long arched spicules. The principalia 

 are oxytetracts, oxytriacts, and oxydiacts. The parenchyma contains discohexasters and 

 discohexacts. Graphiohexasters occur near the outer skin. The dermal skeleton contains 

 slender hypodermal oxyhexacts. The gastral skeleton consists of strongly developed 

 pentacts. Fiji Islands, 610 fathoms. 



Genus 2. Walteria, n. gen. 



With the single species, Walteria fiemmingii, n. sp. 



The wall of the sack-shaped body consists of a lattice-work with irregularly angular 

 meshes of various size and form. It is continued at one end into a funnel with square 

 meshes. The distal ray of the hypodermalia is thickened and rounded off. The 

 parenchyma contains discohexasters with many, and others with few terminal rays. The 

 Horicomes have numerous (fifteen) terminal rays on each principal. North of Kermadec 

 Islands, 630 fathoms. 



(ZOOL. CH.^LL. EXP. — PART LIII. — 1887.) Ggg 47 



