THE NAUTILUS. 91 



E. mercatcria atrata n. var. 



Much larger than mercatoria, very dark colored, and strongly 

 ribbed or costulate ; periphery subangular in front. Whorls 6^ to 

 6|, the last shortly deflexed in front ; lip purple-brown, evenly 

 arcuate, not sinuous. Alt. 35, diam. 50 mm.; alt. 32, diam. 46 mm. 



Received from Mr. Hirase as from the Loo Choo Is.; from Mr. 

 Stearns as from Okinawa. It is represented in the Cat. Mar. Moll. 

 Jap., pi. 10, f. 4. 

 Eulota (Euhadrai caliginosa (Ad. & Rve. . 



This species differs from E. mercatoria in the narrower, more 

 slowly increasing whorls, the last one more swollen below the suture ; 

 the flattened base, producing a straighter basal lip ; in the different 

 shape of the aperture, and especially in the narrower lip, which is 

 sinuous below, being curved forward at the middle of the basal 

 margin. It is not so solid a shell as E. mercatoria, is rounded at the 

 periphery, and has much the coloring of the lighter specimens of 

 mercatoria, though the ground is generally yellower. The pale 

 border above the peripheral band is often not well developed, and 

 sometimes it is yellow throughout except the peripheral band. 



In the Catal. Mar. Moll. Jap., this species is excellently repre- 

 sented in figures 1, 2, 3 and 6 of plate 10. 



It was supposed by Adams and Reeve to be from Mindanao, but 

 there can be no doubt that it is a species of the Loo Choo (Okinawa) 

 fauna. 



ON A GENUS ^HYLLAPLYSIA NEW TO THE PACIFIC COAST. 



BY WM. II. DALL. 



The Rev. Dr. Geo. W. Taylor, of Wellington, British Columbia, 

 has recently forwarded to me some marine slugs which were found 

 on floating sea-grass near Nanaimo, Vancouver Island. An exam- 

 ination shows that these animals represent a genus, Phyllaplysia, 

 not hitherto known except in Southwestern Europe, and an unde- 

 scribed species. 



The animal in most respects differs very little from P. lafonti 

 Fischer, the type of the genus. It is subtranslucent, smooth, of a 

 uniform pale lemon-yellow color, very much flattened, resembling 

 some of the Planarian worms. The specimens sent by Dr. Taylor 

 are presumably somewhat contracted by alcohol, which may account 



