106 A renicolidae 



Arenicola cristata (continued) 



Child, Arch. Entw.-mech., ix (1900), p. 587 (Wood's Holl and North 



Falmouth, Mass.). 

 Gamble and Ashworth, Q. J. Micr. Sci., xliii (1900), pp. 423, 541, pi. xxii, 



fig. 1, pi. xxiv, fig. 30 (Jamaica). 



Horst, Notes Leyden Mus., xi (1889), p. 40, pi. iii, figs. 6-11 (gills, chaetae). 

 Ives, Proc. Acad. Nat. Sci. Philad. 1890 (1891), p. 73. 

 Lillie, Mitt. Zool. Stat. Neapel, xvii (1905), p. 344 (nephr., devel.). 

 Lo Bianco, Atti B. Accad. Sci. Fis. Mat. Napoli, v, ser. 2, no. 11 (1893), 



p. 11, tav. i, fig. 1, tav. ii, fig. 1, tav. iii, figs. 5, 6; Mitt. Zool. Stat. 



Neapel, xiii (1899), p. 484 : xix (1909), p. 577. 



Verrill, Trans. Conn. Acad. Arts Sci., xi (1901), p. 39 : xii (1907), p. 147. 

 Webster, Bull. U.S. Nat. Mus., no. xxv (1884), p. 323 (Bermuda). 

 Wilson, Studies Biol. Lab. Johns Hopkins Univ., ii (1882), p. 278 (devel.). 

 Arenicola ? cristata 



Webster, 32 Ann. Eep. N.Y. State Mus. (1879), p. 117 (New Jersey). 

 Arenicola antillensis 



Liitken, Vid. Med. Naturh. Foren. Kjobenhavn 1864 (1865), p. 120 



(St. Croix). 

 Ehlers, Mem. Mus. Comp. Zool. Harvard, xv (1887), p. 173 (Florida; 



Captiva Key) ; Zeit. Wiss. Zool., liii, Suppl. (1892), pp. 218, 255, 



tafl xiii, figs. 30-32. 

 Arenicola cristata, partim 



Fauvel, Mem. Soc. Nation. Sci. Nat. Math. Cherbourg, xxxi (1899), p. 169. 

 Mesnil, Bull. Sci. France Belg., xxx (1897), p. 163. 



Caudate Arenicola, with seventeen chaetiferous segments ; eleven 

 pairs of gills, the first situated on the seventh segment ; gills large 



N.GR. 



CH. Ses! 



Fig. 45. A. cristata, from Wood's Holl. Anterior end, 

 dorsal aspect ; buccal mass protruded : PR. Prostomium ; 

 PER. Peristomium ; N.GR. Nuchal groove; A.B.S. Achae- 

 tous body-segment ; CH.SKG'. First chaetiferous segment. 



and pinnate, their axes generally joined basally by a web-like mem- 

 brane ; median lobe of the prostomium larger than the lateral lobes : 



