76 SCALARIA. 



S. ohtusicostata (fig. 80) and S. varicosa (fig. 86) of Sars, not 

 Brocchi, are synonyms. 



S. OcHOTENSis, Middendorflf. PI. 15, fig. 87. 



Thick, white, subdiaphanous ; whorls numerous, flatly convex, 

 with irregular spiral impressed striae, and very irregular thick 

 slightly oblique, low ribs. Length, 60 mill. 



^0. Coast of the Sea of Ochotsk. 



One of the giants of the genus. 

 S. BOREALis, Gould. PI. 16 fig. 89. 



Solid, whitish, smooth, with seven or eight stout ribs and much 

 wider interspaces, whorls about 8. Length, 1*5 in. 



Vancouver's Isl. northward. 



On account of S. borealis, Beck, an unacknowledged species, the 

 name was changed independently in the year 1876 by Canefri to 

 S. Gouldii, and by Morch to S. Wrohlewskyi. 



S. AU8TRALIS, Lam. PI. 16, fig. 90. 



Thick, whitish, whorls about 10, slightly convex, smooth, with 9 

 or 10 very thick, rounded ribs. Length, 1*5 in. 



Australia. 



Very closely allied to the preceding species, which has been 

 confounded with it. About the only differences consist in one or 

 two more ribs to each whorl. It remains to be seen whether this 

 diflference is constant. 



S. Magellanica, Phil. PI. 15, fig. 88. 



Shell white, solid, subventricose ; whorls 8, distinct, with rather 

 thick, numerous ribs, bent in a roundish angle near the suture. 

 Length, 1 in. 



Straits of Magellan. 

 S. Grgenlandica, Chemn. PI. 16, fig. 91. 



Whorls 10-11, convex, thick, distantly spirally grooved, con- 

 tiguous, with stout, recurved or sub-decumbent ribs. Length, 1*5 in. 



Greenland to Massachusetts. 



S. suhulata, Couthouy is a synonym ; as is also S. planicosta, Kiener. 



S. LovENi, A. Adams. PI. 16, fig. 94. 



Whorls 8, somewhat convex, spirally sulcate, ribs flattened, 

 bluntly aculeate above. Length, 15 mill. 



Arctic Sea. 



