PLATE IV. 



F;o. Page. 



1. Undina jyurheclcensis, sp. nov. ; imperfect fish, one-half nat. size, with 



dorsal scales (1 a), ventral scales (1 h), and caudal flank scales {\ c) 

 enlarged three times. — Middle Purbeck Beds; Swanage, Dorset. 

 The type specimen. B, M. no. P. 11925. a., fragment of anal fin ; 

 d\ d'', remains of two dorsal fins ; plv., base of pelvic fin, 22. 



2. Goccolepis andrewsi, A. S. Woodward; fish wanting pectoral fins, three- 



halves nat. size. — Lower Purbeck Beds ; Teffont, Wiltshire. The 

 type specimen. Museum of Practical Geology, London, no. 419. 24. 



3. Ditto ; hinder half of fish, three-halves nat. size, with anal scale (3 a) 



enlarged ten times.— Ibid. B. M. no. P. 6302. 25. 



4. Goccolepis sp. ; imperfect right maxilla, outer view, twice nat. size. 



Wadhurst Clay; Buckshole Quarry, Silverhill, Hastings. Charles 

 Dawson Collection (B. M. no P. 11924). 25. 



