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1909.} IN BRITISH SPECIES OF CORALS. 307 
TABLE CoRRELATING INDIVIDUAL Growrn-Sraces (A, B, C,....) witH 
CostTaL-STAGES OF THE WuoLe Serres (I., II., IIL.,....). 
N.B.—Where letters are not in continuous sequence (e.g. P. jfittoni, A, D, EB) the 
missing letters represent katagenetic stages. 
| { 
| 
Pre- Costal- Costal- Costal- Costal- ICostal- Costal- Costal- Costal- Costal-| 
costal-, stage | stage | stage | stage | stage! stage stage stage stage | 
| stage. 1a aay pice a i | Wa PP aVELep V2 UT VIII. | IX, | 
. serpentina Edw. & H..... A Bae ice D ¥ | | 
. centralis (Mantell) ......) A Baer © D Diol id) (Cet) | 
ejuttont Bdw. & WH. .........| x x x x A | A A D E | 
. gramidata Duncan ...... x x x x A || B Coe Bye Genk / 
teraeni iw GM | x) x | x | x | A |B oe ian | F | G 
. mantelli Edw. & H. DAM | | KI Ie oc Se wegen ns to 
Neylind nico mbdwa ci RGus | xX! | x | Se SG is TAC rie lenin at 
» mons, Duncan ....+.-. ere al eros x x A B C D E | F, G | 
TABLE FOR DETERMINATION OF ENGLISH SPECIES OF Parasmilia. 
A. Peduncle and lowest part of Trochoid shape-stage smooth or with 
faint, plain cost; no granules; 1. e. costal-stage VIL. is not 
attained. 
( I. Cost over most of the corallum with sharp plain crest; i.e 
H costal-stage ILI. is dominant ...... 1. Parasmilia serpentina Edwards 
II. Coste over most of the corallum with rough, irregular mark- [& Haime. 
ings, but not granular; 1. e. Héched Period is dominant. 
2. Parasmilia centralis (Mantell). 
B. Peduncle or lowest part of Trochoid shape-stage with granules ; 
i. e. costal-stage VII. is attained. 
( I. Granules are the costal ornament even in the most distal parts 
of the corallum, though the granules may be massed to- 
gether ; i.e. costal-stage LX. is not attained. 
i In the parts of the corallum with granular cost# the 
_granules are mostly individually separate and the costwz 
low and broad ; i. e. costal-stage VII. is dominant. 
| 3. Parasmilia fittoni Edwards & 
6. In the parts of the corallum with granular coste, the [Haime. 
granules mostly are more or less massed and the costz 
comparatively high; 1. e. costal-stage V ILI. is dominant. 
4. Parasmilia granulata Duncan. 
| 1. At the distal end of the corallum the coste are thin, high 
and sharp and without granules; 1. e. costal-stage LX. is 
| attained. 
(a. Granules vanish from coste only for short periods, before 
a rejuvenescence; i.e. costal-stage LX. is hardly attained. 
| ( No intercostal dissepiments; a long katagenesis be- 
tween costal-stages VI. and VIL. 
h 5. Parasmilia gravesi Edwards & 
| 2. Numerous intercostal dissepiments ; costal-stage VII. | Haime. 
tL immediately follows costal-stage VI. 
6. Parasmilia mantelli Edwards & 
b. Gains vanish from cost over long stretches of the (Haime. 
corallum ; i. e. costal-stage LX. is easily attained. 
(1. Coste on the peduncle on the whole are low and in- 
conspicuous with many granules; i. e. costal-stage 
| | | VIL. is well developed. Corallum is large, diameter 
| | in cylindrical shape-stage 15-20 mm. 
7. Parasmilia cylindrica Edwards & 
| 2. Coste on the peduncle on the whole are high and { Haime. 
granules not scattered; i. e. costal-stage VII. is 
| | | poorly developed. Corallum is small, diameter in 
cylindrical shape-stage 6-8 mm, 
Gate 8. Parasmilia monilis Duncan. 
L 
