EOLIDID^. 



E. Alderi. Like the last, with the denticles a little more slender (averaging 23 on each side) ; the 



base pale yellow, with the boundary line a little darker. 13 plates. Tongue tapering 



gradually. O-l-O. Pig. 6. 

 E. coronata. Lingual plate arched, rising into a strong spine in the centre, with 7 or 8 denticles 



on each side. Upwards of 15 plates; amber-coloured. Tongue tapering. 0-1-0. Fig. 7. 

 E. Drummondi. Like the last, but having the plates more pointed, with 9 denticles on each side. 



16 plates; brown amber-coloured. 0-1-0. 

 E. elegans. Lingual plate slender, deeply arched and pointed, tapering to a very strong spine in the 



centre, with 6 denticles on each side. About 20 plates; pale yellow. 0-1-0. Fig. 8. 

 E. rufibranchialis. Central plate tapering to a strong, rather obtuse point, with 7 denticles on each 



side ; a separate, slender lateral spine on each side, of an acute triangular form, with the 



apex turned outwards, and having on the inner margin 12 or 14 minute denticles, 15 to 



20 rows; amber-coloured. 1*1*1. Fig. 9. 

 E. lineata. Like the last, but with the lateral spines considerably larger and broader, with the 



apex curved inwards; the inner margin with 13 denticles. 14 rows; pale yellow. 1*1*1. 



Fig. 10. 

 E. smaragdina. Like E. rufibranchialis, but with the central plate broader, more squared at the 



sides, and the denticles stouter ; the lateral spines more triangular, shorter, the apex 



curved inwards, and with only 6 denticles. About 13 rows ; colourless, 1*1*1, 

 E. gracilis. Like the last, but with the denticles of the central plate longer, stouter, and only 4 in 



number; denticles of the lateral spines 8. About 13 rows; pale straw-coloured. 1*1*1. 



Fig. 11. 

 E. pellucida. Lingual plate uniformly arched, pretty evenly denticulated, with 15 denticles, the 



centre one not much larger than the rest ; lateral spines 1 on each side, smooth, pointed, 



broad at the base. 26 or 27 rows. 11*1. Fig. 12. 

 E. Landsburgii. Central plate a pointed arch, with the marginal denticles straight, rather stout, 



nearly as large as the central one, 5 on each side ; lateral spines 1 on each side, rather 



large, with 5 or 6 denticles on the inner margin, and the apex much produced. 27 rows ; 



pale yellow. Tongue tapering slightly. 1*1*1. Fig. 13. 

 E. alba. Lingual plate a slender, pointed arch, smooth at the sides, with a large, smooth central 



spine; no lateral spines. 11 or 12 plates; pale yellow. O-1'O. Fig. 14; and Fam. 3, 



PL 7, figs. 11, 12. 

 E. carnea. Like the last, with the spine a little more slender. 0-1 -0. 

 E. glaucoides. Tongue very slender and minute, with apparently a single, smooth central spine. 



Upwards of 50 rows, closely united, and appearing like one continuous band. (We have 



only been able to see this tongue in profile, as represented in the figure.) 0-1-0. Fig. 15. 

 E. Peachii. Lingual plate a pointed arch, with a broad, angulated base, the apex rising into a strong 



spine, with 9 or 10 small lateral denticles. 18 plates; dark amber-coloured. Tongue 



tapering. O'LO. Fig. 16. 

 E. nana. Lingual plate a broad arch, with a thick, obtuse central spine, and 5 curved denticles on 



each side. 21 plates; dark amber-coloured. Tongue tapering. 0-10. Fig. 17; and Fam. 3, 



PL 7, figs. 9, 10. 

 E. stipata. Lingual plate a broad, slender arch, with 11 strong, straight denticles, the central one 



scarcely exceeding the others in size. 69 plates; pale yellow. Tongue not tapering. 



0-1-0. Fig. 18. 

 E. concinna. Lingual plate a pointed arch, straight at the sides, and tapering to a strong central 



spine ; lateral denticles 5 on each side, rather stout, curved, and not so long as the central 



spine. 29 plates ; brown amber-coloured. Tongue tapering very little. 0-1-0. Fig. 19. 



