the Trondhjem Fiord, 355 



This is the smallest form of this very variable species that 

 I have, and of peculiar interest as being absolutely identical 

 in size, form, and colour with a variety of the allied 8, pro- 

 pinquus, Alder, found in the Kattegat, and for which I am 

 indebted to the Copenhagen ]\luseura. The different character 

 of the nucleus alone distinguishes them ; and, although the 

 use of a lens reveals spiral stria3 in the latter which are absent 

 in the former, such striae are usual in 8. gracilis and are even 

 to be distinguished on a young specimen of the present form. 



The Kattegat variety of 8. proipinquus is intermediate iu 

 size and form between typical 8. jjrojnnquus and *S'. Jeffreijsi- 

 anus, Fisher, which latter I regard as a large variety of the 

 former. It is figured (PI. XVI. figs. 5, 5 a) for comparison 

 witli the dwarf form of 8. gracilis, var. glaher. 



29. Buccinvm midatum, Linn. 



Specimens procured, not representing any special variety. 



30. Nassa reticulata, Linn. 



All the examples of this species which I have dredged on 

 the west coast of Norway, in the Hardanger, Bergen, and 

 Trondhjem Fiords, and at Floro, have a peculiar aspect and 

 form a well-marked variety, which I would propose to call 

 var. norvt'gica. The form is shorter and proportionately 

 broader tliau usual, so that the outline is more ovate; the ribs 

 are about twenty-five on the body-whorl, very close together, 

 and, as the spiral grooves are deeply channelled, the sculpture 

 is of a more regular reticulate character than usual ; tlie colour 

 is greenish ashy. Of the twenty- five figures of iV. reticulata 

 given by Kobelt on plate xxiv. of his Icon, der schalentra- 

 genden europ. Meeresconchyl. 1887, fig. 24 comes nearest to 

 this form. 



31. Nassa tncrassata, Strom. 

 Laminarian zone. 



32. Irophon truncatus, Strfim. 



One dead specimen, 40 fath., Rudberg. 



33. Trophon claihratus, Linn. 

 In 70-300 fath., Kodberg. 



Var. Gunneri, Loveu. 



Two half-grown examples with the last. 



