C Y C L S T U E M A. 



■■peci 



17. (Fig. a, h, Mus. Rrit.) 



CvcLosTi'.EMA srii;cr,.\. Ci/c. testii planorhula, com- 

 preSMi ; spird cxcavald ; anfractibus lapidc cres- 

 ccntibns, spiralitcr strkilis, prope suturam dec/iris, 

 Uevil)U.<, ultimo fliyiinctv ; ttmbilico vutMiDO ; aptr- 

 turd mti'jni'i, margine externa crenulato. 



The sriHULA Cvci-OSTiiEMA. Shell jilanorbular, com- 

 pressed ; spire excavated ; whorls rajiidly in- 

 creasing, spirally striated, sloped and smooth near 

 the suture, last disjoined ; umbilicus very large ; 

 aperture large, outer margin creiuited. 



A. Adams. Proe. Zool. Soc, 1850, p. 44. 



Subgenus Daronin, A. Adams. 



Serpidaria t'pindd, II. it A. Adam.s. 



TIab. Philijipines. 



The shell is named from its resemblance to f:pinda, 

 being coiled on a plane and having the last whorls a 

 little apart. 



Species 18. (Fig. a, b, Mus. Brit.) 



Cyclostrema nivea. Cj/e. testa oblique semiglobosd, 

 leecijatd, superne convexd, infra snbplanvlatd, 

 spird pcvdii elevatd, anfractibus rapide crescenti- 

 bus ; nmbiliai majimo ; (iperturd tiiiiijnd obliiju^ 

 ovatd. 



The snowy Cyclostrema. Shell obliquely semiglo- 

 bose, smooth, convex above, a little flattened 

 below, spire a little raised, whorls rapidly in- 

 creasing ; umbilicus very large ; aperture large, 

 obliquely ovate. 



Chemnitz. (Turbo.) Conch. X., pi. 1G5, f. 15, 87, 88. 



Delphinula nivea, Philippi. 



Tubiola nivea, A. Adams. 



Hab. Jajian. 



This is the largest of the three species constituting 

 the subt^enus Tubiola. 



Species 10. (Fig. a, b, Mus. Brit.) 



CvcLosTKEJiA OBVOLUTA. Ci/c. testd oblique ovatd, 

 nujii rnc dipressd, ad laterd compressd ; spird 

 plaiKitd, vltiino anfractu supenii; infrilque angu- 

 tato, medio plaimlato; umbilico Udo ; aperturd 

 oblique ovatd. 



The whapped up Cyclostrema. Shell obliquely ovate, 

 depressed above, compressed at the sides ; spire 

 flattened, last whorl angular above and below, 

 flattened in the middle ; umbilicus wide, aperture 

 obliipiely ovate. 



A. Adams. Ann. and iSIag. of Nat. Hist., LsliU ; Proc. 

 Zool. Soc, 16C,:i. 



Ilab. Japan. 



Species 20. (Fig. a, b, Mus. Brit.) 



CvcLOSTnEMA CYCLOTIXA. Cyc. tcstd planovliuld, Icevi- 

 gutd, valde depressd ; spird pkind ; ultimo an- 

 fractu rapide crescenti, hand contiguo; umbilico 

 magna, intiis piano; aperturd magnd, suhrotundd, 

 suprii infrdque obscure aiigulatd. 



The LITTLE WHEEL Cyclostrema. Shell planorbular, 

 smooth, much depressed ; spire flat ; last whorl 

 rapidly increasing, not contiguous; umbilicus 

 large, flat within; aperture large, rather rounded, 

 obscurely angular above and below. 



A. Adams. Sowerby's Thesaurus. Species {Daronia) 2, 

 fig. 35, 36. 



Hab. Japan. 



A second species of Daronia having, like Sp. 17, a 

 planorbular coil and slightly disconnected whorls. 



June, 1874. 



