490 Descriptions and Notices of 



Pupa unicarinata, Lam., Bulimus Canimensis, Pfeif., 

 Archiv, 1839. 



Found on a small limestone knob on the Retiro, some in 

 the woods and others on the side hill. 



Pupa servilis, Gould. See page, 356. 

 Pupa contracta. Say. 

 Pupa chrysalis, Fer. 



The animal is light greyish, the anterior tentacles very small ; 

 motions very sluggish. Found on the rocks on one side of 

 Matanzas harbor, within reach of the spray, in company with 

 Littorina angulifera, lineata, &c. Others of a much more stint- 

 ed growth were found farther inland. When at rest, they 

 secure the aperture by a firm, membranous epiphragm. 



An entire revision of the large West India species of Pupa 

 is requisite. They appear to have been but httle studied ; 

 and the descriptions given are very indefinite. The above 

 species, for instance, might be referred, with almost equal 

 propriety, either to P. uva^ P. chrysalis, P. maritima, Pfeif , 

 and the small variety to P. miimioh, Pfeif. That varieties are 

 broad and numerous does not admit of doubt. 



Pupa (Cylindrella) elegans, Pfeif, Wiegm. Archiv, 1840. 

 Pupa (Siphonostoma) lituus, Gould. 



Animal, nearly white, with a slight tinge of slate color 

 above. The foot is very short, blunt behind, and in all re- 

 spects like that of Pupa chrysalis. If it proves to belong to 

 a new genus, the name Siphonostoma, (originally Brachypus, 

 Guilding, Zool. Journ. iv. 167,) will have precedence over 

 that of Cylindrella, Pfeiffer. 



Pupa (Siphonostoma) porrecta, Gould. Plate xxiv. fig. 12. 



Testfi gracillimd, fusiformi, glabr&, pellucidA, maculis albis, subquadratis, 

 obscure tessellatis : anfr. ad 24, ultimo disjuncto et vald6 porrecto : 

 aperturS. campanulatd, subquadrata ; peristomate albo, reflexo. 



