Wot t on certain Terrestrial Mollusca, 



scribed the animal and teeth of O. Trinitaria Pfr. of Trini- 

 dad : 



"The animal is ashy gray, becoming nearly black about the head 

 and tentacles. Foot elongate, narrow ; tentacles (4) slender. Lin- 

 gual ribbon very long and narrow; teeth 3-1-3; medians narrow, 

 bicuspid, with two tubercles on the base; first and second laterals 

 with simple round cusps, outer lateral inconspicuous, rather claw- 

 shaped." 



Morch has since observed (Jour. a\ Conch, vii. 257, ISO") 

 that lny figure of C. scazva appears to confirm the accuracy of 

 the observation ofSchmidt and of Guppy's description. I agree, 

 however, with Crosse and Fischer (Jour, dt Conch, vi. 223, 

 1 866), that the similarity of structure of the lingual armature in 

 Cylind/rella and Testacella, referred to by Schmidt, is more 

 apparent than real, being confined to the oblique arrangement 

 of the lateral teeth. 



An unlooked-for discovery was announced by Crosse and 

 Fischer in a very interesting paper in the January number 

 i L868) of the Journal de Conchyliologie. After remarking that 

 authors have repeated the assertion of Schmidt that Cylin- 

 dretta has no jaw, and explaining thai an opportunity had 

 utly occurred of examining the animal of ('. Ghiesbreghti 

 Pfr., Crosse and Fischer give the result in a passage of which 

 the following is a translation : 



"We have proved the presence in this species of a jaw, arcuate, 



horE shaped, very finelj striated longitudinally, with an ob- 



lightly indicated median projection ai the inferior margin, 



and a rounded plate or support projecting beyond the edge of the 



-ui e, ior margin. 



•• The lingual armal ure i>. moreo\ er, very remarkable. The lingual 

 denticulations are disposed in rectilinear transverse series, nurae- 

 i and all of the Bame type, with apices scarcely extending be- 

 yond their base, the siugle median or rachidian tooth is a little 

 -mailer ili.ni the other-, and tricuspid. The dental formula is (32- 

 L -82) x 110. 



I id e ring the nature of its teetli the animal musl he her 

 bivoroua ami not zoopbagous. The classifications which have 

 placed the molluscs of this ltc. .mj < with the carnivorous Puhnonates 



