448 CYLINDRELLA §. 14. 15. 



236. microstoma Pfr. VI. 390. — Ilolospira microstoma Crosse Sf 



Fisch. iii Journ. Conch. XVIII. p. 24 ; Moll. terr. Mex. p. 337. 

 t. 17. f. 9. — Habitat? 



* * * 



237. imbricata Martens. VI. 390. — Holospira imbricata Crosse 



Sf Fisch. in Journ. Conch. XVIII. p. 24; Moll. terr. Mex. p. 336. — 

 Respubl. mexicana. 



* * * 



238. salpinx Tristram. -J- VI. 39-1. — Crosse ^ Fisch. Moll. terr. 



Mex. p. 415 (species dubia). — Guatemala. 



§. 15. 



239. Ludersi Pfr. IV. 712. VI. 391. — Habitat? 



240. C. irrcgularis Gabb. 



T. ad apicem fere umbilicata, cylindraceo- turrila, apice 

 non truncata, obtusiuscula, conferte et arcuatim costala, pallide 

 cornea; spira elongata, irregularis, anfractibus 3 primis aequa- 

 libus; sutura simplex; anfr. 16 — 18 oonvexi, ultimus minus con- 

 vexus, antice breviter solutus, non descendens, dorso et basi 

 subacute carinatus; apertura vix obliqua, rhombea, latere si- 

 nistro substriclo, basi canaliculato; perist. continuum, margini- 

 bus subparallelis, supero recto, obliquo, columellari late expanso, 

 dexlro et infero expansiusculis; umbilicus angustus, aequalis, 

 extus angulo cinctus. — Long. 20, diam. 5 mill. (Goll. Nr. 173.) 

 Cylindrella irregularis (Urocoptis) Guhh*) in Amer. journ. 

 conch. III. 1876. p. 238. t. 16. f. 4. 



conum breviusculum terminata; sutura impressa; anfractus 15 — 16 sub- 

 plani, primi 1'/, laevigati, cornei, sequentes 9 — 10 conferte et oblique 

 costulati, sequenlcs 4 costulis magis distantibus, paulo majoribus et sub- 

 arcuatis impressi, ultimus breviter solutus, antice procedens, dorso et basi 

 obsolele angulatus, pallidior; apertura verticalis, oblique angulato-ovalis, 

 intus albida; peristoma undique liberum, breviter expansum, vix reflexius- 

 culum, album. — Columna interna . . . ? — Longit. vix 15, diam. maj. 

 3 mill. Apert. cum perist. oblique S^/j mill. longa, 2 lata.» 



*) « Shell about an inch long, slender, spire irregularly tapering, the 

 first three whorls being of the same diameler, the next five to sevcn 

 whorls increasing steadily, after which the remainder are nearly of Ihe 

 same diameler; apex not always exacfly in the axe of the shell; whorls 

 sixteen to eighteen, rounded on the side, body whorl slightly subangulated 

 below; suture impresscd; umbilicus minutely perforafe, and bordered by 

 a slight anglc; aperfure irregular in oulline, angulated internally, above 

 and below; oufer lip but slightly expanded; inner lip curved internally, 

 and expanded so as to hide fhe umbilical region in part, most expanded 

 in the middle, and in some specimens distincfly subangulaled at this point. 

 Surface sculptured by small longitudinal, slighfly arched ribs; color light 

 horn brown.» (G.) 



