294 DR. A. E. TEUEMAtf OX THE [vol. lxxiv, 



EXPLANATION OF PLATES XXI-XXV. 



[All the specimens, except where otherwise stated, were collected by the 

 Author, and are now in the collection of the Geological Department, University 

 College, Nottingham.] 



Plate XXI. 



Fig. 1. Liparoceras tiara, sp. nov. X '8. 



Yellow Lias (hemera of Beaniceras), collected during excavations 

 for a bridge near Manor Farm, Gotherington, Cheltenham. (L. Rich- 

 ardson Coll.) 



2. Liparoceras sparsicosta, sp. nov. X "7. 



From a well at Queen's Wood cottages, Prestbury, near Chelten- 

 ham. (L. Richardson Coll.) 



3. Liparoceras sparsicosta, sp. nov. 



From Napton (Warwickshire). 



a. Section showing the retention of the depressed form of whorl 

 X 3 ; b & c. Inner whorls, at a diameter of 1*14 mm. X 4 ; cl & e. 

 Early chambers X 20, showing protoconch and siphonal caecum. 



4. Liparoceras cheltiense Murchison. 



From the Battledown Brick-Pit, Cheltenham. 



a & b. Specimen X '54. c & d. Inner whorls of the same X 1*6, 

 showing the fine ornamentation, the first tubercles being unpaired. 



Plate XXII. 



Fig. 1. Androgynoceras divaricosta, sp. nov. a & b X '45; c. Inner whorl at 

 the diameter of 22 mm. From the dsedalicosta sub-zone, Brace- 

 bridge Pit. Lincoln. 



2. Androgynoceras obtusicosta, sp. nov. X '5. From the latsecosta sub- 



zone, Bracebridge Pit, Lincoln. 



3. Mgoceras dsedalicosta, sp. nov. X '28. From the Red Band, St. 



Gabriel's Water (Dorset). (W. D. Lang Coll., No. 3862.) 



Plate XXIII. 



Fig. 1. Amblycoceras dissotypum, sp. nov. a & b X "6; c = Whorl shape at the 

 diameter of 44 mm. From the dsedalicosta sub- zone, Bracebridge 

 Pit, Lincoln. 



2. Beaniceras sp. Inner whorls. X 2*5. From Napton (Warwick- 



shire). (C. H. Watson Coll.) 



3. JEgoceras aff. latsecosta Sowerby. a X '4 ; b = Whorl shape X '8. 



From the Lower Limestone, latsecosta sub-zone, Dorset. (W. L. 

 Lang Coll., No. 1566.) 



4. Mgoceras aff. la tsecostaj development, a, b, & c. Inner whorls at the 



respective diameters of 1*4 mm., *95 mm., '7 mm. ; d. Earlier cham- 

 bers, showing ' prosiphon,' X 20. From the (?) latsecosta sub-zone. 

 Stonebarrow (Dorset). (W. D. Lang Coll., No. 534.) 



Plate XXIV. 



Fig. 1. Amblycoceras crescens (Hyatt). X '73. From the dsedalicosta sub- 

 zone, Bracebridge, near Lincoln. 



2. The same. Inner whorls at the diameter of 3-7 mm. X 11- 



3. Amblycoceras brevilobatuwi, sp. nov. X 6'5. Front view of holotype, 



figured by Mr. L. Richardson (in 'The Geology of Cheltenham, &c.' 

 1904, pi. xv, fig. 7). 



4. Viciniuodiccras simplicicosta, sp. nov. X '65. From the ' valdani- 



zone,' Radstock (Somerset). (J. W. Tutcher Coll.) 



5. Cymbites sp. From the planicosta sub-zone, Lyme Regis (Dorset). 



Sections of inner whorls, a. X 4 ; b, X 20. 



