250 CYCLOPHORID.i;. 



Alycaeiis (Dic/iara.r) expatriatus, Kobelt, Das Tierreich, Lief. 16, 

 i902, p. 369, fig. 8:3. 



Original description: — "Testa mediocriter umbilicata, depressa, 

 ad aufractos interuos obsolete, ad ultituuiu fortius, ad spatiuui 

 iuflatuui valde, crebre costulata, corueo-albida, apice diaphane 

 rubella; spira vix elevata, apice obtusa; sutura impressa; aufr. 3^ 

 couvexi, ultiiuus ad latus mediocriter inflatus, deiiide constrictus ; 

 constrictione louga, medio tuinida, glabra ; tubulum suturale pone 

 coDstrictionem oriens, mediocriter iougum, plerumque i peripheriae 

 subaequans, sed noiinullis exemplis brevius ; apertura circularis, 

 obiiqua, juxta aufr. penultiuuan retro curvatum ; perist. duplex ; 

 internum breviter porrectum, continuum, externum expaiisum, 

 interruptum, columellari margine strictum. Operculum corneum, 

 distincte multispirum. Anfr. 7-8 planulatis, externe percou- 

 cavum, nucleo centrali iuterno prominente papillari. 



"Diam. maj. -i.y, miu. 3|, alt. 2^, apert. diam. 1| mm." 



Hah. India : Neddoowuttom Grhat, JN'ilgiris ; Anamullies and 

 South Canara {Blanfovd) ; Shevroy Hills {Kimi). 



" This species appears to be more depressed in the spire than any 

 other of the genus, except perhaps the Boriiean A. sjnraceUmn, 

 A. Ad. & Reeve. Its nearest Indian ally is A. strangulatus, 

 Hutton, and in size it is intermediate between that species and 

 A. stt/lifer, Bens. It belongs to the section Charax of Benson, 

 having a wide strangulation behind the peristome, crossed by a 

 swollen ridge, which, however, in A. expatriatus never presents 

 the sharpness so remarkable in A. stylifer and hebes, but is rather 

 a broad tutnid space separating two narrow consti'ictions. The 

 sutural tube is variable in length, sometimes being nearly as shar]) 

 as in A. stninguJatus, in other specimens as long as in A. stijlifer ; 

 the latter being the usual case, the former the exception, but both 

 occur in perfectly fresh and full-grown specimens. 



"From A. strangulatus t\\e s]iQC\es is distinguished by its greater 

 size, more depressed form, more oblique aperture, by the recur- 

 vation of the peristome at its junction with the penultimate 

 whorl, the longer sutural tube, the greater distance of the ridge 

 crossing the constriction from the mouth, and the closer sculpture. 

 From prosectus and stylifer the characters of the peristome, which 

 is simple in stylifer and expanded at the columellar margin in 

 prosectus, hesxdes the smaller size of A. expatriatus; from hehes 

 and gemmnla the slightly prominent ridge not recurved and 

 the depressed form, afford abundant grounds for distinction. 

 A. spiracellum of Borneo is probably closely allied, but we are 

 only acquainted with that shell by its description. Judging 

 therefrom, A. expatriatus should be distinguished by its smaller 

 size, more narrow umbilicus, greater bluntness of the ridge in the 

 constriction, and, in general, by the greater length of the sutural 

 tube, a character which, however, is evidently, from its variability 

 in this species, of less value than has hitherto been supposed. 



