W. D. Lang — Jurassic Polyzoa. 



321 



DiAGiiAM II, to shoAV the method of brauchiug in Jurassic forms of the two 

 'genera' Stomatopora and Froboscina. 



These figures are diagTammatic reproductions of pieces of specimens in the Britisli 

 Museum. The Museum register number is given with each. 

 Fig. 1. Lateral branching ; B. 4,238. <SYow««<oj?om <?j'a««</«^ffl (Milne Edwards) : 



Chalk, Enghmd ; loc. ? x about 5. 

 ,, 2. Type I with large angle ; B. 2,287. <S7o;««^oj!;ora TFa^iowi, Hairae : Inferior 



(Jolite, Crickley Hill, Dichotomy 2. x about 4. 

 " „ 3. Type I with small angle ; B. 2,287, same specimen as the last. Dichotomy 8. 



X about 4. 

 ,, 4. Type II with small angle ; B. 4,247. Stomatopora dlcJiotomoides {I)^Oi\).)t 



Cornbrash, Wiltshire, x about 6. 

 ,, 5. Type II with large angle, preceded by Intermediate Type with large angle ; 



B. 4,832. Zoarium marked 2. Siomatopora diehototna (Lajaova-oux) t 



Cornbrash, Wiltshire, x about 6. 

 ,, 6. Intermediate Tj^je with small angle; B. 4,382, same specimen as the last, 



but the zoarium marked 1. x about 7. 

 ,, 7. Intermediate Tj-pe with large angle; 60,536. Stomatopora, s]^. : Coi-nhvash, 



"Wiltshire, x about 6. 

 ,, 8. Type II with an angle of 0° ; 97,617. Froboscina Cunninfftoni, Gvegoij : 



Cornbrash, Chippenham, x about 5. 

 ,, 9. Type I with angle of 180° ; D. 2,064. Zoarium marked 5. Stomatopora 



dtchotomoides (D'Orb.) : Cornbrash, Midland Railway Pit, Bedford. 



X about 13. 

 ,, 10. The first dichotomy is after Tj-pe II with an angle of 0° ; D. 7,lSo, 



Froboscina, sp. : Inferior Oolite, Crickley Hill, x about 7. 

 ,, 11. The arrangement of the peristomes is irregular from the first ; D. 1,843. 



Froboscina Eudesi,TS.woas: Inferior Oolite, Gloucestershire, x about 7. 



DECADE T. — VOL. I. NO. Til. 21 



