16 •■ DECAPODA. STOMAPODA. 



THENOPS, Bell, 1857. 

 Thenop.-f, Bell, 1857, Mon. Pal. Soc. pt. 1, p. 33. 

 Distrihufion. London Clay. 



Thenops scyllariformis, Bell. London Clay, Sheppey and Highgate. 



Thenops snjUariformis, Bell, Mon. Pal. Soc. 1857, pt. 1, Crustacea, p. 33, pi. vii. 

 figs. 1-8. 



TRACHYSOMA, Bell, 1857. 

 TracJti/soma, Bell, 1857, Mon. Pal. Soc. pt. 1, p. 41. 

 Distribtttimi. London Clay. 



Trachysoma scabrum, Bell. London Clay, Primrose Hill. 



Trachiisoma scahrvm, Bell, Crustacea of Lond. Clay, pt. 1, Mon. Pal. Soc. 1857, 

 p. 41, pi. X. fig. 11. 



TROPIFER, Gould, 1857. 

 Tropifer, Gould, 1857, Quart. Journ. Geol. Soc. vol. xiii. p. 360. 

 Didribidioti. Lias bone-bed. 



Tropifer laevis, Gonld, 1857. Lias bone-bed, Aust Passage. 



Tropifer ter^), Gould, 1867, Quart. Journ. Geol. Soc. vol. xiii. p. 3G0, figs. 1, 2, 3. 



Order II. STOMAPODA. 



PYGOCEPHALUS, Huxley, 1857. 



Pyriocephnhs, Huxley, 1857, Quart. Journ. Geol. Soc. vol. xiii. p, 363; 

 il. Woodw. 1867, Trans. Geol. Soc. Glasgow, vol. ii. p. 240. 

 Distiibution. Coal Measiu-es. 



Pygocephalus Cooperi, Huxley, 1857. Coal-shale, Medlock Park 



Bridge, Ashton-under-Lyne. 

 Fygocephabis, Huxley, 1857, Quart. Journ. Geol. Soc. vol. xiii. p. 363, pi. 

 xiii. ; H. Woodw. 18G7, Trans. Geol. Soc. Glasgow, vol. ii. p. 240, pi. iii. 

 fig. 1, 2. 



Pygocephalus Huxleyi, H. Woodw. 1867. Lower Coal-measures in 



Ironstone nodule, Paisley. 

 Pygocephalus Cooperi, Huxley, 1862, Quart. Journ. Geol. Soc. vol. xviii. 



■^p. 420 (woodcut, p. 421). 

 Tycjoceplmlus Huxleyi, II. Woodw. 1867, Trans. Geol. Soc. Glasgow, vol. ii. 

 p. 243, pi. iii. tig. 3, woodcuts, tigs. 1, 2. 



