240 THE VOYAGE OF H.M.S. CHALLENGER. 
Fig. 5. Stephanotrochus platypus, a smaller specimen than the foregoing. a View of 
the under surface, showing in the centre an attachment to a small spiral 
shell. 6 Mouth of the calicle. c Tip of one of the exsert septa and its 
corresponding costa much enlarged. Off Sydney, New South Wales. 410 
fathoms. 
PLATE IV. 
Fig. 1-6. Young specimens of Desmophyllum ingens, showing various stages of growth. 
Patagonia. Lat. 52° 50’S., long. 73° 53’ W. 245 fathoms. 
Fig. 7. Cyathoceras cornu. a Mouth of the calicle. Off the Rio de la Plata. Lat. 37° 
17’S., Jong. 53° 52’ W. 600 fathoms. 
8. Caryophyllia maculata. a Mouth of the calicle of the same. Off Barra Grande, 
Brazil. 400 fathoms. 
Fig. 9. Caryophyllia maculata, larger specimen than the foregoing, attached to a branch 
of a Stylasterid. Above 9 (with its number accidentally omitted in the 
plate), view of the mouth of the calicle of the same, enlarged three diameters. 
Off the Kermadec Islands. 630 fathoms. 
Fig. 10. Deltocyathus magnificus. Under surface. Off the Ki Islands. 129 fathoms. 
Fig. 11. Stephanophyllia formosissima, Under surface. Off the Ki Islands. 129 
fathoms. 
Fig. 12. Stephanophyllia complicata. Under surface. Off the Ki Islands. 129 fathoms. 
PLATE V. 
Figs. 1-4. Desmophyllum ingens. Patagonia. Lat. 48° 18’8., long. 74° 33’ W. 345 
fathoms. 
1. A specimen showing two examples of the largest size fused together laterally, 
with an attachment at the base to a fragment of a third example. a Mouth 
of the calicle of the upper example. 
A somewhat deformed specimen, with roots at the base encrusting the skeleton 
of a Gorgonoid. a Mouth of the calicle of the same, showing one side dis- 
bo 
torted and bent inwards. 
. A cylindrical example, with numerous basal roots also adherent to the skeleton 
of a Gorgonoid. @ Mouth of the calicle of the same. 
. Mass composed of numerous examples fused together reduced in size one- 
half. a View of the broken end of the lower part of one of the calicles to 
show the continuation of the septa within it, and absence of a columella. 
js) 
i 
