34 CYCLOPHORld. 



subdiscoidea, tenuiuscula, radiatim et confertim I'ligiilosO-striata, 

 vix uitidula, hilvo-cornea, rato castaneo-strigata ; spii'a plaiiulata, 

 apiee vix promiiiente, sutura proiuiuliascLila ; aiifractibus 5 coii- 

 vexiiisculis, ultimo longe lenteque descendente ; apertura obliqua 

 luediocri, subrotuiidata, supenie angulata, iiitus albida; peristomate 

 duplici, interiori coiitiiuio, acuto, breviter porreclo, extei'iori ex- 

 pansiusculo, breviter ailuato, albido ; umbilico aperto, prot'undius- 

 culo, opercido tenui, corneo, 7-spirato ; anfractibus valde angustis, 

 suturis intus et estus pulcbre cariuatis. 



" Diam. major 24, minor 20, alt. 8 mill. 

 '>2 18 (i 



., 13 „ 11 „ 4 „ " 



Hab. Ceylon {E. L. Layard, F. Layarcl). 



" The operculum is more closely wound than in C. jmnna, from 

 which it differs in colour, the form and position of the aperture, 

 sculpture, and deeper uu)bilicus ; this part is shallower than in 

 its near ally, C. annulatus, Troscli., which exhibits, moreover, a 

 prominent dark apex to the spire, whereas in C. cratera the apex 

 is flattened and white. The variation in size is considerable, as 

 may be seen by reference to the measurements. The smallest 

 variety exhibits the adult character: the narrow volutions of the 

 operculum, and a darker corneous hue than in C. parma, are 

 constnnt. Its double peristome and the flatness of the apex at 

 ouce distinguish it from C. Thivaitesi, Pfr." {Benson.) 



49. Theobaldius cytopoma, Benson. 



Cychphorus cytAypoma, Benson, A. M. N. H. ser. 3, v, 1860, p. 385 ; 

 'Hanley & Theobald, Couch. Ind. 1870, pi. 47, tig. 9, 1875, p. xv ; 



H. Nevill, Enuui. Helic. Pueum. Ceylon, 1871, p. 4. 

 Myxustoma cytopoma, Theobald, Cat. Shells Brit. India, 1876, 



p. 36. 

 Cyclopliorus (Theohaldius) annitlatus, vav. r(/fo/jo?;ifl, Nevill, Hand 



List, i, 1878, p. 275. 

 Theobaldius cytopoma, Kobelt & Mollendorff, Nachr. Deuts. Malak. 



Ges. xxix, 1897, p. 88; id.. Cat. Pneum. 1899, p. 275 ; Kobelt, 



Das Tieneich, Lief. lO, P.)02, p. 92 ; id., Conch.-Cab., Cyclo- 



phoridae, i, Pt)07, p. 557, pi. 70, tig. 15. 



Original description : — " Testa late et profunde umbilicata, 

 planato-depressa, subdiscoidea, vix uitidula, confertim et arcuatim 

 rugoso-striata, fulvo-castanea, subtus pallidiore apicem versus 

 flammis pallidioribus, et infra medium anfractus ultimi fascia 

 f usca inconspicua oruata ; spira planulata, apice uon prominente, 

 sutura profunda ; anfractibus 54 convexis, ultimo antice sensim 

 descendente ; umbilico |^ diametri sequante ; apertura ampla, 

 obliqua, angulato-ovali, intus lactea, peristomate simplici expausius- 

 culo, superne acute augulato, breviter aduato, intus incrassato- 

 labiato, margine columellari subtus recedente, dextro, superne 

 antice arcuuio. Operculo fulvo-corneo, solidiusculo, 7-spirato, 

 couvexiusculo, ad apicem foveato, intus concavo, margine externo 



