12 THE NAUTILUS. 



in breadth, consisting of some 150 V-shaped rows of numerous small 

 teeth ; of these the central tooth is very narrow and unicuspid, while 

 the laterals are numerous and similar in size and appearance ; the 

 formula being 20.1.20. 



Guantanamo, Cuba, 17th April, 1913. 



NOTES. 



DR. PILSBRY, who has been studying Achaiinellida in ihe Ha- 

 waiian Islands during the winter, has returned to Philadelphia, 

 reporting a highly successful expedition. Communications for the 

 NAUTILUS may hereafter be sent to him as usual. 



POLYGYRA (STENOTREMA) EDWARDSI (Bid.). In his remarks 

 in regard to this species, Ann. N. Y. Lye., VI, 277, Bland says: 

 " In barbiyerurn the attached, hair-like epidermal processes are pro- 

 duced at the suture and carina into cilia, which are entirely wanting 

 in this species." This is incorrect, as three specimens from " Ky.," 

 with Bland's label, in the collection of the late Mrs. George Andrews, 

 all show traces of the sutural and peripheral fringes, and a beautiful 

 albino, collected by Mrs. Andrews at Coal Creek, Anderson Co., 

 Tenn., has the fringes as strong as in any specimen of barbigera that 

 I have seen. The fringe is perfect from apex to lip and the " cilia" 

 measure about 1 mm. in length. Two other specimens from Coal 

 Creek show the fringes but not so strong. These shells also show 

 that the "acute, raised, transverse tubercles" on the base of the 

 shell, in Bland's description, are the hair-scars which in fresh, mi- 

 rubbed specimens are surmounted by stiff, erect bristles. 



I have examined twenty specimens of P. edwardsi from eight local- 

 ities, and all but one (a dead, weathered shell), show at least traces 

 of the sutural fringe. The trouble appears to be that the shells are 

 generally covered with a thick, very adherent coating of dirt, and in 

 trying to remove it the fringes are rubbed off. Traces of the sutural 

 fringe often remain when the peripheral fringe has entirely disap- 

 peared, and shells showing the stiff bristles on the base are, appar- 

 ently rare GEO. H. CLAPP. 



