PLATE \'l. 



Fig. 1. Perimecturus stocki >i\). nov. .. .. .. .. .. .. .. l^^ge 42. 



1. Geol. Surv. Coll., acijuireJ. Nat. size. Part of trunk and tail, showing trunk segments 

 with broad stern ites, trunk limbs, three-quarter view of under .side of tail showing 

 stei'nites with large openings for articulation of pleopods, tail fan with verj' massive 

 outer branch of uropods. Locality, Grauton Shore, Midlothian. S. 23. 



Figs. 2-6. Feririwcturiis elegans sp. nov. . . . . ' . . . . . . . . . . Page 44. 



2. Nat. size. Trunk and tail in usual attitude, showing displaced carapace exposing trunk 



segments, displaced head and trunk organs, tail with three I'ows of spines in place of 

 keels. Locality, Glencartholm, Langholm, Dumfriesshire. M. 697' . 



2a. Part of tig. 2, mag., showing displaced head and trunk organs : a. antennules, an.. .-intenusB, 

 e. eye, r. rosti'um, m.p. ? mandibular palp, nid. endopodites of trunk limbs, 

 ex. exopodites of same, ;/. gills, h.p. brood-pouch. 



3. Nat. size. Trunk and tail of small individual in usual attitude. S1k)ws movable rostrum, 



trunk limlis, epimera of tail segments. Same locality. M. 2S04''. 



4. Mag. 2 diam. Trunk and part of tail, usual attitude. Shows displaced caraj)ace exposing 



the trunk .segments, displaced limbs. Same locality. M. 702''. 



5. Nat. .size. Trunk and part of tail, u.sual attitude ; movable rostrum, trunk limbs, and di.stri- 



bution of spines on tail. Same locality. M.775'. 



6. Nat. size. Tail with two trunk segments attached, and tail fan expanded. Same locality. 



M. 2615''. 



Fi"-. 8. Recent Mysi-^^, mag. 3 diam., to show attitude assumed on dying, to compare with plates v.. 

 vi vii especially pi. vi., figs. 1-5. Locality, Firth of Forth, Granton, Midlotiiian. 

 ■' ■ ' Page 39. 



Fig. i). Perimecturus /MUoni sp. nov. Coutts Collection. Nat. size. Parts of trunk and tail. 

 Shows brood-pouches. Locality, East Kilbride, Lanarkshire. .. .. Page 51. 



