REPORT ON THE HEXACTINELLIDA. 385 



a slender pointed central cone distinctly projects. Tlie inferior pole bears a slender basal 

 tuft of a few long gently curved spicules. The parenchyma contains many small 

 oxyhexacts with smooth curved rays. Tiie larger amphidiscs have lacerate and bell- 

 shaped terminal umbels, with eight somewhat long rays, the pointed extremities of which 

 extend almost to the middle of the amphidiscs. The dermal pinuli have somewhat short 

 rough basal rays, and a long slender radial, running out to a thin point. South-east of 

 Christmas Island, Mid-Pacific, 2425 fathoms. 



Species 7. Stylocahjx tener, n. sp. 



The oval or pear-shaped body exhibits a flat conical narrowed basis, giving off a 

 narrow much twisted basal tuft of long thin spicules. The parenchyma contains numerous 

 small oxyhexacts with smooth curved rays. The large amphidiscs are approximately 

 spherical, with hemispherical terminal umbels of eight to twelve paddle-shaped rays, 

 alternating with those of the other side and almost reaching them. The dermal pinuli 

 have a long, slender, pointed and short-toothed terminal ray. South Pacific, 2550 

 fathoms. 



To these there have to be added some species of Hijalonema which, owing to the 

 insufficient preservation of the upper portion, or to inadequate description, cannot yet 

 be referred to either of the above subgenera : — 



Species 1. Hyalonema lusitanicum, Barboza du Bocage. 



The long and strong spirally-twisted root-tvil't is surrounded l;)y a large Pahjthoa 

 crust. The parenchyma contains small oxyhexacts with sti'aight, or with curved smooth 

 rays. The dermal pinuli exhibit four short basal rays and a somewhat long distal with 

 moderately long lateral spines. The large amphidiscs are elongated and slender. Their 

 deep bell-shaped terminal umbels have eight slender blunt rays. Near Setubal, Portugal. 



Species 2. Hyalonema cebuense, Higgin. 



The body has the form of a sculptor's mallet with the broad portion upwards. The 

 basal tuft is thicker than a goose-quill, and is spirally twisted. The small paren- 

 chymal oxyhexacts have thin straight rays, which are curved outwards at their outer 

 ends and bear lateral spines. The dermal pinuli are somewhat small and slender. The 

 large amphidiscs are narrow, with deep bell-shaped umbels, in which the eight arms are 

 slender. The parenchyma contains slender oxydiacts with teeth which arc directed 

 towards the centre. Zebu, Philippines. 



(ZOOL. CHALL. EXP. — PART LHI. — 1887.) Ggg 49 



