4 Descriptions of Thirty Siipposcd New Species and 



CYCLOSTOMA MAKITIMUM AD. Not being able to find Pro- 

 fessor ADAMS'S description of this shell, I must be excused if 

 I state afresh what he may have already stated, namely, 

 that this is a most variable shell, both in marking and size. 

 Of eleven, which I am adding to the suite of Jamaica Land 

 Shells for the British Museum, six vary in color from yel- 

 lowish white to almost a deep orange, three are of a 

 dingy red brown, varying in shade, with very fine spiral 

 lines of deep brown, and two have broad spiral lines of 

 deep dingy brown on the periphery of the whorls. 



In size the smallest is .33 long, and the largest (truncated) 

 is .64. A comparatively large portion of specimens in the 

 lot I have, is not decollated. 



Habitat, near Galina Point, St. Mary's. 



The kindness and indefatigable searchings of my 

 friend GEOKGE ARMSTRONG, ESQUIRE, of Wentworth, St. 

 Mary's, have put me in possession of several specimens, 

 (where I only had solitary ones previously) of Cycl. pul- 

 cTirius and Cycl. maritimum. My observations on the 

 colors, &c. of the animals will appear in a proposed 

 posthumous work from the manuscript of Professor C. B. 

 ADAMS. 



TROCHATELLA PULCIIELLA AD. Yar. LABIOSA, CHIITY. 

 Under stones, amongst the Fan Palm Thatch at Galina 

 Point, St. Mary's, a variety of this shell occurs, in which 

 (just as in Helicina palliata, var labiosaj) the lip is exces- 

 sively thickened both externally and internally, but not 

 contracting the aperture. 



: For these shells, also, I am indebted to my friend G. 

 ARMSTRONG, ESQ. 



This thickening of the labrum of certain shells, in certain 

 localities, seems to demand attention, 



GEOMELANIA. Professor C. B. ADAMS has most justly 

 said, that in this genus " the different types graduate into 

 each other so as to render the establishment of species 

 extremely difficult," That difficulty causes me t<> pause 



