EUGLANDINA. 205 



This group stands between Varicella and Euglandina in 

 characters of the shell, and some authors have referred the 

 species to Varicella. The general shape and appearance of 

 the shell however are Euglandinoid. Unfortunately no 

 species has yet been dissected. The dentition and genitalia 

 of Varicella and Euglandina are so entirely diverse that an 

 examination of these organs would definitely settle the posi- 

 tion of Varicoglandina. 



The lip has a blunt, rounded edge (unless the specimen be 

 taken during a growing stage), and the growth of the shell is 

 evidently periodic, as in Varicella, while in Euglandina it 

 seems to be more continuous during the activity of the animal, 

 resting stages being usually ill-defined and irregular in oc- 

 currence. 



Group of E. oblonga. 



Small, very smooth and glossy, chestnut-brown forms, 

 slightly plaited at the sutures but elsewhere with the gloss of 

 a Streptostyla; having a few widely spaced varix- grooves. 

 Except in color, this group has great resemblance to Lavo- 

 leacina. 



76. E. OBLONGA (Pfeiffer). PL 26, fig. 11. 



Shell oblong, rather solid, smoothish, irregularly marked 

 with impressed growth-striae, glossy, pale tawny ; spire gradu- 

 ally tapering, the apex obtuse, suture shallow, submargined. 

 Whorls 7, scarcely convex, shortly plicatulate below the su- 

 ture, the last whorl as long as the spire. Columella a little 

 arcuate, obliquely truncate. Aperture subvertical, whitish 

 inside, dilated in the middle, acuminate above. Peristome 

 simple, unexpanded, the right margin arched forward in the 

 middle, sinuated above. Length 15, diam. 5.66, aperture 

 8.5x3 mm. (Pfr.). 



Mexico: Mirador, State of Vera Cruz (Dr. Berendt) ; 

 Tehuacan, State of Puebla (Hoege). 



Oleacina oblonga PFR., Malak. Bl. xiii, 1866, p. 86 ; Monogr. 

 vi, 273. Glandina oblonga Pfr., MARTENS Biologia, Moll., p. 

 69, pi. 5, f. 6. 



