396 THE VOYAGE OF H.M.S. CHALLENGER. 



Species 2. Aphrocallistes beatrix, Gray. 



lu form resembling Aphrocallistes hocagei, Wright, but much smaller and more 







ielicate. Besides the uncinates the parenchjrma contains almost exclusively much 

 elongated oxyhexasters, in which one (principal) axis possesses two long strong principal 

 rays, occasionally with a few lateral spines, and dividing into four strongly developed, 

 moderately long, and somewhat markedly divergent terminals, while the four other rays 

 exhibit uniformly short, simply pointed rays without terminals. Malacca. 



Species 3. Aphrocallistes vastus, n. sp. 



A large cup, 40 cm. or more in height, and 30 cm. in breadth, rising from a 

 compact knobbed basal portion growing on the substratum. The lateral diverticula of 

 the wall are flat and pouch-like, and longitudinally disposed. The parenchyma contains 

 besides long uncinates, most swollen near the outer end, numerous disco- or sphsero- 

 hexasters with moderately long terminal rays of variable form and size. On the dermal 

 hexact pinuli the free distal ray is broad and bushy. The dermal scopulae usually bear 

 only two or three straight, somewhat uniformly thick, terminally rough prongs without 

 distinct terminal knob. The gastral membrane contains straight rough diacts, and 

 occasionally monacts. Japan, 180 fathoms. 



Species 4. Aphrocallistes ramosus, n. sp. 



Dichotomously branched tubes, 4 to 10 mm. in diameter, attached by means of a 

 compact basal plate. The branches open with round terminal apertures. The loose 

 parenchymalia are represented not only by uncinates and by numerous small rough 

 oxyhexacts, but also by oxy- and sphsero-hexasters elongated in the direction of the main 

 axis, with principal rays of various length, and with moderately long terminals, usually 

 developed only on the two principals of the long axis. The dermalia have a weakly developed 

 distal ray, which is frequently either almost, or wholly without the lateral spines of the 

 pinuli. The adjacent dermal scopulse possess four straight, or slightly dislocated prongs 

 with spiny terminal knobs. The gastral membrane contains diacts of various length, 

 with rough and rounded ends. Japan, 80 to 200 fathoms ; Phillippine Islands, 375 

 fathoms. 



Family III. Coscinoporid^, Zittel. 



The smooth wall of the cup-, goblet-, or j)late-like fii-mly fixed body is traversed by 

 more or less elongated, funnel-shaped, straight canals, which open alternately on either 



