46 THE NAUTILUS. 



scales, or where they are rubbed off the surface is roughened with 

 comparatively coarse, short striae. "Whorls 5| ; periphery subangular 

 at the beginning of the last whorl. Peristome thin, narrowly ex- 

 panded and subreflexed. Alt. 7.5, diam. 12.5 to 13 mm. 



Mikurij'a, Suruga. Types no. 83317 A. N. S. P., from no. 937 

 of Mr. Hirase's collection. 



The peristome of this species is of the same character of that of 

 trachyderma. Mr. Gude dissents from the course I took in subordi- 

 nating trachyderma to aperta. He writes : " I decidedly consider 

 tracJiyderma as more nearly related to mimida than to aperta. Only 

 look at the peristome, which is so decidedly thickened in aperta (and 

 you must remember that your types of aperta were immature shells). 

 If you will examine tiiem again I think you will agree with me, and 

 '\^ trachyderma must be degraded to varietal rank, by all means place 

 it under mimida '' (G. K. G. in litt. Jan. 7, 1902). 



I am now much disposed to adopt this view ; but pending a 

 thorougli study of the group, I allow the })ublished status of the 

 form to remain. 

 Eulota (^Plectotropis) maclcensii wh.t. formosa, nov. 



Sliell similar to E. macketisii and vulgivaga except that the umbili- 

 cus is less widely open and the lower margin of the lip is less deeply 

 curved. Alt. 10^, diam. 23^ mm., whorls 6^. 



Taihoku, Formosa. Types no. 83332 A. N. S. P., from no. 429 

 of Mr. Hirase's collection. 



Schmacker& Bcittger have already commented upon this Formosan 

 form of mackensii, which they had from Tamsui (Nbl. D. Mai. Ges. 

 1890, 136). 

 Eulota (^Cozlorus) caviconus Pils. 



Nautilus XV, p. 117 (February, 1902). The locality should be 

 Goto, Hizen, in Kyushu. Mr. Hirase has sent specimens from Ojika- 

 jima, Hizen (no. 928), which are a little larger than the type lot, 

 diam. 7.6 mm. 



Eulota suhm.anda'>-ina var. compacta nov. Differs from the typical 

 form by the larger umbilicus, more elevated spire of 6^ very convex 

 whorls ; very solid, light chestnut colored, without a peripheral band. 

 Lip expanded and strongly thickened within. Specimens measure : 

 Alt. 19.5 to 20, diam. 21.5 mm., and alt. 19, diam. 22.5 mm. 



Yakushima. Types no. 82498 coll, A. N. S. P., from no. 777 of 

 Mr. Hirase's collection. 



