298 MR. W. D, LANG ON GROWTH-STAGES [Mar. 2, 
costal-stage VIIT.). On resumption of growth costal-stage VII. 
reappears (text-fig. 41, D*) succeeded by costal-stage VIII. before the 
third rejuvenescence (text-fig. 41, E*). This sequence is repeated 
before the fourth and fifth rejuvenescences (text-fig. 41, D*®, D‘- 
E’, E’). The fifth and sixth rejuvenescences are compound ones, 
several occurring in both cases in quick succession. In both, 
too, the coste reach a more elevated condition and the massed 
granules tend to form a ridge before rejuvenescence occurs (text- 
fig. 41, F’, F’). This stage is not advanced enough to be con- 
sidered costal-stage [X.,and does not recur in the corallum of this 
specimen though there is a seventh rejuvenescence. The fifth, 
sixth, and seventh rejuvenescences throw the cost back to costal- 
stage VII 
4, PARASMILIA GRANULATA Duncan. (Text-fig. 42.) 
Parasmilia granulata Duncan, 1869, “ British Fossil Corals,” 
Mon. Pal. Soc. p. 13, pl. vi. fig. 5. 
Monocarya centralis Lonsdale, 1850, in Dixon’s ‘ Geology of 
Sussex,’ pl. xviii. fig. 2. 
Text-fig. 42. 
PARASMILIA 
GRANULATA , DUNCAN. 
CYLINDRICAL STAGE. 
—REJUVENESCENCE. 
ae T-ROCHOI/D STAGE. 
4. 
Gs __ REJUVENESCENCE . 
Pp 
= — REVUVENESCENCE.- 
= TROCHO/D STAGE . 
tis — REJUVENESCENCE. 
E z 
é  REJUVENESCENCE . 
é/ 
TROCHOID STAGE. 
Dd. 
[EHO Grr? 2s 4 nee 
pt PEDUNCLE STAGE. 
A UL 
Costal stages in P. granulata Duncan. 
Type-specimen, B.M. no. R. 6612. &X 2. 
