EASTERN PKOVINCE SOUTHERN REGION SPECIES. 439 



Animal thick aud massive, dirty or yellowish white, darker on the 

 middle of the back ; surface i ugose, with prominent, oblong glands 

 and deep furrows. Whole length, exclusive of eye-peduncles, three 

 inches. Eye-peduncles, when fully extended, one inch long, bulbous, 

 with small, black, ocular points ; tentacles one-fifth of an inch long, 

 slender. Orifice of generation behind the eye-peduncle on the right 

 side. Mantle somewhat bilobed, protruding beyond the aperture, and 

 slightly reflected. Posterior extremity rounded, sides corrugated, 

 lower surface smooth, squalid. Eggs moderate, oblong-subrotund, 

 with a granulately roughened, thick, calcareous covering. 



Found in Jamaica and Cuba and at Key West ; also in Mexico. 



The specimens figured in the Terrestrial Mollusks were received 

 from the southern part of the peninsula of Florida, in the Miami coun- 

 try, and from Key West to Key Biscayne. It has been refeired also to 

 Louisiana and Texas, but I have nev^er heard of its presence there 

 being well authenticated. It is diflBcult to explain its distribution ex- 

 cept by supposing it to have been a widely distributed species of some 

 extinct fauna which has survived at various points around the Gulf of 

 Mexico. 



This species inhabits trees. It attaches itself to the tree during hi- 

 bernation or estivation, and covers its aperture by an opaque, iuspif*- 

 sated, glutinous secretion, which, though exposed to wind aud rain, 

 forms a perfect adhesion and protection to the animal, and only yields 

 to its own solvent powers on the approach of spring. It exists in 

 great numbers, and the dead shells are a favorite habitation of a spe- 

 cies of hermit crab. 



The figure of the animal of Orthalicus given on p. 436 is reduced 

 from a drawing prepared for the Terrestrial Mollusks, but not there 

 figured. On Plate LXXVII, Fig. 13, of Terr. Moll., lY, I have given 

 another view of the same shell, also prepared for publication in the 

 Terrestrial Mollusks. I am not certain from what locality the shell 

 was received, but from the fact of Dr. Binney describing in his work 

 no shells but what he knew to exist in the United States, I am inclined 

 to believe he received it from Florida. His collector would be more 

 likely to furnish him with a living specimen from that point than he 

 to receive it. from some Mexican or South American locality. I do not 

 know to which species it may be referred, but presume it to be B. un- 

 dains. He thus describes it: 



" The mojst beautiful form of the species is that figured in Plate LIY, 



