34 



MOSS & WEBB : ANATOMY OF CHLORITIS. 



An examination of the soft parts has been made by the 

 writers and the following notes will serve in the first place as a 

 corroboration of Mr. Smith's opinion and, in the second, together 

 with those on the other species (C. rehsci) as a contribution to 

 our knowledge of the section Siilcohasis. 



In the two columns below some of the characters of the 

 genera Chloritis and Jhersites [^Hadra) are contrasted, tliose 

 points which have been made out in Chloritis stirophora are 

 italicized while the references in brackets are to pages in the 

 " Guide to the Study of the Helices." 



CHLORITIS. 



THERSITES. 



Shell — '■'Apical ivhorls and 

 usually the whole shell sculptured 

 2jith hair-points arranged in quin- 

 cunx,'" thus — %* (p. n8.) 



Animal — " Tail rounded, above 

 with an impressed longitudinal 

 median line — see below — 

 Mantle edge hearing a small right 

 body lappet, -'(p. iiy C.porteri). 

 Sperniatheca duct, rather long and 

 closely bound to the uterus — Plate 

 III., figures 3 & 8. In Fig, 3 

 the sperniatheca has been freed 

 — penis cavity containing at the 

 apex an imperforate fleshy 

 papilla." (p. 117). 

 " A peculiar feature is that the 

 epiphallus bears not only a short 

 flagelluni at its apex, but a curved 

 ' talon.' " — Letter from Mr. 

 Pilsbry,* August 19th, 1896. 

 (See also figure of C. argillacea, 

 Plate xxvn., figs. 8 & 9). 



Shell — " Apex smooth, never 

 granulated or punctate in regu- 

 lar quincunx " (p. 125). 



ANnL\L — "Tail with a slight 

 median longitudinal groove " 

 (p. 126). 



" The duct of the sperniatheca 

 generally long and swollen 

 below " (p. 126). 



" Penis enlarged distally ..nere 

 its cavity contains a solid 

 papilla " (p. 126). 

 " The flagellum is shorter or 

 obsolete (p. 126)." 



" Nothing of the sort {i.e. 

 ' talon ' has been found in 

 Thersites." — Letter from Mr. 

 Pilsbry, August 19th, 1896. 



In addition, it may be pointed out that the jaw of C. stirophora — 

 Plate III, figure 6 — seems most nearly to resemble that of 

 Chloritcs, while the radula, though of the general type common to 

 this and allied genera, very closely resembles that of C. rchsei, 



■ a dissection was sent to Mr. Pilsbry (together with a jaw, a photograph ot the 

 radula and some notes), who agrees that the anatomy is decidedly that of 

 thiol itis. 



