I UK N A L I I I. La. 103 



the form of the protoplax is variable and the sculptured portion often 

 very irregular or obsolete; callum round and tumid. Length, 9-17 mm. 



New York to Florida, Cuba and Texas. Tottenville, Staten Is- 

 land, burrowing in oyster shells (Tryon). 



Although the figure given by d'Orbigny lacks the protoplax, the 

 raised callus border surrounding it is clearly defined, while his de- 

 scription of the protoplax " Ovato-oblonga, antice producta, acuta 

 uncinata, postice dilatata angulata," agrees with what has been con- 

 sidered D. smilhii. During my residence at St. Augustine (1880-87), 

 I found a large number of fine specimens in a piece of soft artificial 

 limestone off the water battery of Fort Marion. In my list of the 

 shells of St. Augustine (THE NAUTILUS IV, 4) I confused this with 

 M. cuneiformis. This species has only been recorded from shells 

 and limestone while M. striatiis and cueiforwis are more frequently 

 found in wood. Its occurrence as far north as New York is prob- 

 ably accidental. 



NOTE ON THE NOMENCLATURE OF THE SNAILS USUALLY CALLED PUPA. 



BY T. D. A. COCKEKELL. 



Since it appears that the name Pupa is not applicable to the snails 

 usually known as Pupa muscorum, blandi, etc., it becomes necessary 

 to determine what generic name they are entitled to. Mr. B. B. 

 Woodward has placed them in Jaminia, Risso, 1826, of which he 

 regards Pupilla, Leach, as a synonym. A study of Dr. DalPs paper 

 in NAUTILUS, 1904. p. 114. convinced me that this conclusion was 

 not unassailable, and with the help of additional information very 

 kindly supplied by Dr. Ball, 1 have decided to my own satisfaction 

 in favor of Pupil/a. The argument is as follows : 



1. Jaminia, Risso, 1826, contained species afterwards referred to 

 Alaa (1830), Abida (1831), Pupilla (1831), Encore (1837), and 

 Sphyradium (1837). The first species is minutissima Hartmann, but 

 this does not agree with the generic diagnosis. The only figured 

 species is an Abida, or Eucore. 



2. Altza, Jeffreys, 1830, contained among other things cdentula, 

 Braparnaud (now referred to Sphyradium) and minutissima, Hart- 

 mann. The latter is taken as the type by Dr. Ball (t. c., p. 115). 

 Conchologically, minutissima has the characters of Sphyradium, and 

 not at all those of Vertigo, Pupilla, etc. Its reference to Sphyradium 



