THE NAUTILUS. 5 



nounced carina at (he base ; suture lightly impressed and submar- 

 gined ; aperture slightly oblique, circular in some examples or trans- 

 versely narrowed in others; peristome slightly tinged with the 

 prevailing ground color of the shell, well expanded all around and 

 reflected, not continuous above, but attenuated or reduced to a mere 

 film and appressed to the body whorl in some examples, or in other? 

 detached and continuous, and produced outward near the upper part 

 of the right side of the aperture and with a sinus or notch on the 

 produced part. Long., 24 to "25 mm.; diam. at middle of spire, 9 

 to 10 mm.; aperture with peristome appressed, 8 mm. high and 

 wide; when produced and with peristome detached, 6 mm. high, 

 and 6 to 7 mm. wide. 



In several of its characters this species is rather inconsistent. In 

 specimens found side by side and manifestly of the same brood, some 

 examples show strong affinities with Thaumasia sanguinea, others 

 with Thaumasia cylindrus, others again with Gongylostoma lata 

 (? Thaumasia lata), in so far that if becomes often very difficult to 

 locate them decisively. 



In the two specimens figured, one has the lip appressed, as in 

 sanguinea ; in the ot^er it is detached and expanded towards the 

 right side of the aperture and bears a notch or sinus. In one the 

 sculpture is decidedly like that of sanguinea, on the other it is like 

 that of cylindrus, but stronger. In specimens with the aperture but 

 slightly produced and the peristome uninterrupted by attenuation and 

 adhesion to the body whorl, or produced and not bearing a sinus, the 

 resemblance to lata is very great. 



Habitat : (!) Phtenix Park, near the Monarque in the. parish of. 

 Saint Ann ; (!) environs of Brown's Town in the same parish. 



NOTES ON MESESCHIZA GKOSVENORII LEA. 



It is now over thirty-seven years since Mr. Lea described this spe- 

 cies, and additional specimens have not been reported. In his Mono- 

 graph of the family Strepomatidae, Mr. Tryon says, in a foot-note page 

 350, " every specimen examined shows evidence of diseased growth." 

 In the description, the location of notch is stated to be inconstant 

 or wanting. Admitting then that the notch of this species is a de- 

 formity, where should the specimens described by Mr. Lea be placed ? 

 The notch being a deformity, the genus would not stand, because that 



