ANALYSIS. 



T.— CrUSTAOBANS: Page. 



221. TheCrab8 76» 



228. The Common Edible or Blue Crab '. 775 



823. The Lobsters 780 



824. The American Lobster : 781 



225. The Cray Fishes, Astaous and Cambarns 812 



226. The Shrimps and Prawns ..: 816 



227. The Mantis Shrimps: Squillidae 823 



228. TheAmphipods 824 



229. Thelsopods .-^. 826 



230. The Entomostraoans 827 



231. The Cirripedia .^....828 



232. The Xiphosura .;...„ 829' 



Z. — ^WORMS : 



233. The Annelids 831 



234. The Leeches 833 



Z. A. — The Eapiates : 



235. The Echinoderms 838 



236. The Coelenterates 841 



Z. B. — The Pokipbrs : 



837. The Sponges 843 



838. The Genus Spongia, and the American Commercial Sponges 846 



239. Injurious Sponges ' 850 



(761) 



