MANUAL OF NATURAL HISTORY. 291 



extended posteriorly, bearing false feet, and ending 

 In a caudal fin. 



23. FAMILY. Plaited-Lobsters (Galatheidse). Cara- 



pace oblong, depressed, front beaked ; outer 

 foot-jaws pediform ; fore-legs large, ending in 

 a well-developed pincer, fifth pair very slen- 

 der, folded below the others in the branchial 

 cavity ; abdomen longer than thorax ; caudal 

 fin large and lamellar. 



24. FAMILY. Locust-Lobsters (Scyllaridse). Cara- 



pace very large, slightly elevated, straight in 

 front, with a horizontal prolongation between 

 the bases of the outer antennae ; outer an- 

 tennae foliaceous and very large ; foot-jaws 

 moderate, sub-pediform ; fore-legs ending in 

 a styliform tarsus, hind-legs of female end- 

 ing in a small incomplete pincer ; abdomen 

 very large. 



25. FAMILY. Thorny-Lobsters (Palinuridse). Cara- 



pace convex, longitudinal, front with two 

 large horns ; eyes large, short, rounded ; in- 

 ner antennae very long ; outer antennae vei;y 

 thick and long, basal joints spiny; outer 

 foot-jaws small, pediform; mandibles very 

 thick, with cutting edges ; legs all monodac- 

 tyle, fore-legs the shortest ; abdomen very 

 large and long. 



26. FAMILY. Scorpion-Lobsters (Thalassinidse). Ca- 



rapace small, laterally compressed, shortly 

 beaked in front ; eyes small ; external an- 

 tennas with a small moveable spine at base ; 



o2 



