NOTE ON UROCOPTIS LATA C.B. Ad. var. PRODUCTA 

 C.B. Ad. 



By G. C. SPENCE. 



(Read before the Society, September nth, 1912). 



Form "much more elongate [than typical form], sub-conic. A 

 specimen is 1*23 inch long and "34 inch broad" (Adams). 



Pilsbry in Tryon's Manual, vol. xv., page 116, adds " Known to 

 me by above note only. It is larger than any form of the species I 

 have seen, measuring about 3o|- x 8^ mm." 



In face of the above meagre notes I was pleased to come across 

 shells labelled " Cylindrella lata var. producta C. B. Ad., Jamaica," 

 in an old collection of Jamaican land moUusca now deposited in the 

 Manchester Museum. This collection was made by John Jay and 



Fig. I. Fig. II. 



many of the specimens probably came from Professor Adams himself, 

 although I do not think there is any documentary evidence of this. 

 It would, therefore, appear that these shells are worth figuring, as 

 unfortunately, in common with many of Adams' species, the description 

 is so inadequate that identification without figures is very difficult, if 

 not impossible. 



In the shells under notice the colour and sculpture are as in the 

 typical form. The internal pillar of the specimen examined is also 

 identical, being stout within the last four whorls, with a weak spiral 

 tendency, above which the column rapidly becomes very slender with 

 a slight twist — resembling fig. 51 on Plate 30 of Tryon's Manual, 



vol. XV. 



Figures I. and II. measure 25 x 7-25 mm. and 26'5 x 8 mm. 

 respectively. 



