Mr. A. G. Butkr un the Genua Cleis. 393 



crust ; c c, central cylinder (compressed or oval form) ; rf, frac- 

 tured anterior extremity oi the same; e, posterior extremity or 

 tail more or less covered by the tuberculous layer; f, eminences 

 of the tuberculous layer of a conical form attached to th<' central 

 cylinder, l^ amulid-lilie ; </, central lou^ntudiual depression simu- 

 lating dorsal vessel ; h, commencement of a 't gemmipai'ous 

 branch. 

 Fig. S. The same : frajrment of a central cylinder, broken (compressed 

 form ) to show its ? sefjrmented appearance, &c. a a, remains of 

 concretiomiry crust ; b b, nu)uld of tuberculous layer therein ; 

 cc, portions of tuberculous layer adherent to the cylinder; 

 dd, central cylinder, showiny the sefrmented appearance; e, 

 central long-itudiual depression simulating' position of dorsal 

 vessel ; ff, lateral linear depressions simidating positions re- 

 spectively of lateral vessels or seg^mental grooves ; ff, line of 

 fracture; /<, portion whose other side is represented in tig. 0. 

 Fiff. 4. The same : branched form, a aaa, concretionary crust ; b bb by 

 casts and moulds respectively of tuberculous layer; cc, P parent 

 circular cylinder; dddd, branches truncated respectively; e, 

 ? gemmiparuus projection or commencement of new brancli on 

 circular cylinder ; /, form of the cells of that portion of the con- 

 cretionary crust taken off y, where these cells ( = i)ioidd of the 

 tuberculous layer) are most regularly formed ; h Ii, compressed 

 cylinder. 



This specimen looks as if the circidar branched cylinder (c c) 

 were in contact with the compressed form (h A), all of which was 

 enclosed within one and the same tuberculous layer, which was 

 prolonged sheath-like upon the branches respectively. 

 Fig. 5. The same : central cylinder (circular form) divested of the tuber- 

 culous layer to show the tran.sverse reticular lineation. a, form 

 of depressed reticular lineation with slightl}' raised or convex 

 interstices (scale-like) "where most regular. 

 Fig. 6. The same : the other side of that portion of fig. 3 marked " A," 

 to show the form of the tuberculous layer when divested of the 

 concretionary crust and still adherent to the central cylinder. 

 a, central cylinder (compressed form) ; b b, tuberculous layer ; 

 c c, situation of sponge-spicules. 

 Fig. 7. The same: transverse section of a central cylinder (circular 

 form), and its tuberculous layer divested of the concretionary 

 crust, showing the relative position of the two former, a, cen- 

 tral cylinder ; b, tuberculous crust. Diagram. 

 Fig. 8. The same : transvei-se section of a central cylinder (compressed 

 form), to show the same, a, central cylinder ; b b, tuberculous 

 layer ; c c, incrustation of sponge-spicules &c. 



XXXVI 11. — Revision of the Lepidopterous Geniis Cleis, with 

 Descriptions of the neio Species. By ARTHUR G. BuTLER, 

 F.L.S. &c. 



The genu.s Cleis is nearly allied io Callidiila, Tyndaris, ami 

 Cleosiris. These four genera appear to me to be an aberrant 

 group of the family IIy|)si(la\ and should be placed between 

 the true llypsid;e and the Melaincrida\ 



