On ProphyKaon, etc. 



309 



lished descriptions.* Since then we have received through 

 the kindness of Mr. Gwyn JeftVeys six specimens, preserved 

 in spirit, of Geomalacus maculosus, Allm. This enables us 

 to give the following description and figures. 



Jaw (fig. A), high, stout, dark horn-colored, arched, ends but little 

 attenuated, bluntly rounded; anterior surface with about twelve, broad, 

 crowded ribs, of wliicli four on the middle part of the jaw are stout, well 

 developed, denticulating either margin, and produced below so as to give 

 the appearance of a median projection to the cutting edge : the remainder 

 of the ribs are unequally developed in the several specimens examined, 

 being sometimes scarcely discernible; on one specimen is a median, 

 transverse line of reinforcement, parallel to tlie margins of the jaw. 



Lingual membrane long, not very broad. Teeth arranged in horizontal 

 rows, of the form common to the Helicince. Centrals (fig. B) tricuspid, 

 laterals (Fig B) bicuspid, the external cusps of each being subobsolete. 

 Marginals (Fig. C) quadrate, with one long inner oblique, pointed cusp, 

 and one outer, small, pointed cusp. Extreme marginals lower than 

 wide, but retaining the same bicuspid character. 



Fig. A gives an enlarged view of the jaw, B gives one 

 central and two lateral teeth of the lingual membrane. C 

 gives several marginals. 



The genitalia are as usual in the limaciform Helicince. The testicle is 

 black, embedded in the upper lobe of the liver, connected by a long 

 epididymis to tiie oviduct. The ovary is tongue shaped. The oviduct is 

 convoluted. The genital bladder is small, round, with a long, delicate 

 duct. The vas deferens is twice as long as the whole genital system, four 



♦Owing to our copy of Xachrichtsbl. ni;il. Ge.-ellsch. being imijeifect, the rtescription 

 of Heynemann I. p. 165-168, pi. i, flg. 1, is known to us only from the notice in the Zoo- 

 logical llecord, VI, p. 5U3. 



