C Y C L S T R E M A. 



II. 



Species 8. (Mas. Crosse.) 



Cyclostiiema Sciikammii. C'/c. /cMsiili/i'pirfssii ; spird 

 stihcoinpliinatd, aiifractihus propi fulnnvu I'xcavatis ; 

 concentricc obtiqiii litiuinis cxtnutihus ornalis, 

 superne aaiminalis. 



ScHUAMMi's Cyclostukma. Shell subdepressd ; spire 

 rather flattened, wliorls excavated near the 

 suture; concentrically oljli(|Ucly ornamented witli 

 extant lanunre, acuminated aliove. 



FiscHEii. Journ. de Cunch., pi. 10, I'. 10. 



Ilab. Guadaloup. 



Species 9. (Mas. Brit.) 



Cyclostrema micans. Ci/c. tcsid depressd, crassd ; 

 spird pared, depressd ; aii/ractibus conceiitrici 

 rugatis, concentrice tricariiialis, rwinis nodulifens, 

 medid niagis prominenti ; apertin-d parvd, rotundd ; 

 marffine inlegro, crasso, crenulato ; uiMlico parvo. 



The shining Cyclo.stukma. Shell dei)ressed, thick ; 

 spire small, depressed ; whorls concentrically 

 three-keeled, keels noduliferous, the middle one 

 more prominent ; aperture, small, round ; margin 

 entire, thick, crenulated ; umbilicus small. 



A. Adams. Proc. Zool. Soc, 1850. 



Cycloslrema pulchella, Dunker. 



Cyclostrema modesta, Gould. 



llab. Port Lincoln. Japan. 



Spe 



(Mus. Adams.) 



CiXLOSTREMA Ammonocera?. Ci/c. ti'std plimorliculari, 

 anfractibus depre/sis, costis concentricis crassius- 

 cidis omatis, inter castas tenuissime striatis; ultimo 

 anfractu prope suturam et circa umbilicum planato; 

 timhilico inediocri ; aperturd magna ; labia externa 

 tenui. 



The Ammoxoceiias Cyclostrema. Shell planorbicular, 

 whorls depressed, ornamented with I'ather thicls; 

 concentric ribs, finely striated between the ribs ; 

 last whorl flattened near the suture and round 

 the umbilicus ; umbilicus middle-sized ; aperture 

 large ; outer lip thin. 



A. Ai.AMs. Ann. and ^Mag. of Nat. Hist., 1803. 



llab. Japan. 



Species 11. (Fig. </, b, Mus. Brit.) 



Cyclostrema l.«vis. Ci/c. featd majuscidd, subdepressd, 

 Icevigatd, spird paulo elevatd, anfractibus carinatis ; 

 ultimo anfractu carinis subdistantibus ciiicto ; 

 umbilico magna, costd marginato, plamdato. 



The smooth Cyclosti!Ema. Shell rather large, ratlier 

 depressed, smooth, spire a little elevated, whorls 

 keeled ; last whorl encircled with rather distant 

 keels ; umbilicus large, bordered with a ril), flat. 



KiENEU. (Delphinuhi.) Spec. Gen., [.. 12, pi. 4. f. ii. 



JJelphinula nivea, Reeve. 



Cyclostrerna diastrela, GouKl. 



Ilab. Port Lincoln, Australia. Japan. 



Species 12. (Fig. a, b, Mus. Brit.) 



Cyclostrema .\ngulata. Cyctesld majasculd, depressd; 

 anfractibus latis ; ultimo anfractu magno, inedio 

 angulato, supict angulem spinditer costellatd, infrd 

 medium planato, circa umbilicum carinalo ; umbilico 

 lata, planato ; aperturd magno, margine externa 

 angulato. 



The a.ngular Cyclostre.ma. Shell rather large, de- 

 pressed ; whorls broad ; last whorl large, angular 

 in the middle, spirally ribbed above the angle ; 

 flattened below the middle, keeled round the um- 

 id, flattened ; aperture 



bilicus ; umbilicu 

 large, outer margii 



A. Adams. Proc. Zool. 



//(,//. Isl. Zeba, Philipp 



June, 187-1. 



IbTI. 



