152 



NOTES ON THE GENUS ANOMA, Albeus. 

 By E. R. Sykes, B.A. 



Read Uth Maij, 1904. 

 PLATE IX. 



Recently Mr. Pilsbry has written ' an exceedingly interesting 

 monograph of the many puzzling forms usuallj- grouped in collections 

 under the specific names of J. Mawjeri and A. striata. Included in 

 his work, however, are a number of names representing forms unknown 

 to him, and, having recently worked through, with his review, the 

 collection formed by Chitty, now in the British Museum, and also 

 a good series broiight from Jamaica by Mr. G. Nutt, I have thought 

 it might be of interest to supplj^ a few critical notes, and to figure 

 a few forms that Mr. Pilsbry was unable to see. 



In the first place, Mr. Pilsbry, when diagnosing the genus, states 

 " apex unknown " There are several young specimens in Chitty's 

 collection showing the protoconch, and I now figure (PL IX, Fig. 1) 

 an adult shell of A. f^phvdens., the only specimen that I have seen 

 in which the upper whorls remain when the shell is fully grown. 

 The specimen has 16 whorls, the first three white, then about 

 five are horn-colour, finally the colouring shades into the usual dark 

 brown, and the white zone appears below the suture. The actual 

 protoconch is glassy, rather bulbous, blunt, and smooth, and appears 

 as if intorted. 



It must be understood that, in the case of species not mentioned, 

 I have no remarks to offer, and am in accord with Mr. Pilsbry ; also, 

 that these notes are confined to Jamaican forms. 



Anoma Gossei (Pfr.). 



The type of this species is in the British Museum. 



Anoma tricolor (Pfr.). 



Chittjr's raphanina is an absolute synonym. There are in his 

 collection young specimens with the protoconch. This latter feature 

 agrees in gxmeral with the description given above, as do also the 

 protoconehs of A. sinuata and A. solida, var. valida. 



Anoma gracilis (Adams). 



I now figure (PI. IX, Figs. 2, 2a), from Chitty's collection, both 

 this shell and its 'var. integra'' (Figs. 3, 3«), which latter I regard as 



' Man. Couch., ser. ii, vol. xvi, pp. 1—10. 



