4 Catalogue of Chaetopoda 



refer to any of the marine worms above mentioned ; the description 

 of these is given in the following book, which is headed "De 

 Aquaticis." A similar practice was followed by a number of sub- 

 sequent writers, for instance, Eay and Linnaeus, who placed marine 

 worms among " Insects," and earthworms and parasitic worms in the 

 class " Vermes." 



During the next century and a half there appeared several 

 memoirs which included studies and figures of worms. Among these, 

 works by Columna * and Bonannus 2 are noteworthy for good figures 

 of a Serpulid and of a Nereid and its jaws ; Molyneux 3 gave figures 

 of the external characters and " an account of a not yet described 

 Scolopendra marina" evidently an Aphrodite ; Ellis 4 described and 

 figured tubicolous worms, and Peysonnel 5 published " Observations 

 upon the Sea Scolopendra," in which he described the external 

 features and the action of the pharynx of a nereidiform worm. 

 During this period there were also four works of more outstanding 

 importance by Willis, Eedi, Eay and Bonnet. In Willis' classical 

 account 6 of the earthworm the external features, gut, circulatory and 

 reproductive systems are described, and minutiae, such as chaetae, 

 dorsal pores, etc., are discussed. Eedi 7 described and figured 

 portions of the anatomy of Hirudo and Lunibricus terrestris, he noted 

 the occurrence of different species of earthworms, figured Scolopendra 

 marina [a nereid] and its alimentary canal, gave descriptions and 

 figures of Hystrix marina [Aphrodite] and its alimentary canal, and 

 two figures of a Serpulid. Eay in his " Historia Insectorum " (1710) 

 divided " Insects " into those which undergo metamorphosis and 

 those which do not. The latter were subdivided into " Apoda " and 

 " Pedala." Among the " Apoda Terrestria " were placed Lumbrici 

 terrestres (of which Eay distinguished four kinds), and some parasitic 

 worms "Lumbrici intestinorum " ; among the "Apoda Aquatica" 

 were ranged the Hirudines. The " Pedata " were classified according 

 to the number of feet present six, eight, fourteen or many. Those 



1 Aquat. et Terr, aliquot Anim., pp. xxi, xxii, in Minus Cogn. Stirp., Eoma 

 (1616). 



2 Eecreatio Mentis et Oculi, in Obs. Anim. Test., Eomae (1684), pars i, 

 cap. v, p. 30, tab. ii. 



3 Phil. Trans. E. Soc. Lend., xix (1695), p. 405. 



4 Nat. Hist, of Corallines, London (1755), p. 90, pi. 36, " Tubularia 

 arenosa Anglica" [Sabellarid] ; p. 92, pi. 34, " Corallina tubularia melitensis" 

 [a Sabellid] . 



5 Phil. Trans. E. Soc. Lond., li (1759), p. 35. 

 c De Anima Brutorum, Londini (1672), p. 47. 



7 De Animalculis vivis. Ex Etruscis Latinas fee. P. Costae, Amstelae- 

 clarni (1708). [1st Edit. 1684.] 



