

too 



I.AMKLLIBRANCHIATA. 



A. Montagui var. Warhami: 

 Length 



rj • r> mm 



23-5 - 



23 - 

 22.5 - 



22 

 22 



2O.5 - 

 2O.5 - 

 20-5 - 

 20 



Height 



18.5 '"" 

 16.5 

 18 

 18 



17-25 - 

 l6.75 " 

 15-75 " 



15-5 " 



16.5 



16 



Height 



Breadth 

 Length 



34-i 7c 

 36.2 - 



42.2 - 



53-3 - 



39-8 - 



43-2 - 



4i-5 - 



39 - 



43-9 - 



50 - 



The concentric ribs frequently reach right down to the ventral margin, but other specimens 

 are only ribbed on the nmbonal region or to the middle of the shell, showing on the rest of the shell 

 only fine lines of growth (= Astarte fabula Reeve). 



Some few specimens belong to the variety striata, which in my opinion — as already mentioned — 

 is only a shorter form than Warhami 1 ); to try and keep them distinct owing to the different colour 

 of the periostracum is not correct, as the variety Warhami. for example, may begin as straw-yellow 

 and end as dark-brown. — For the sake of comparison I ma)' give here the measurements of the 

 few specimens from East Greenland : 



A. Montagui var. striata . 



Length 



21-5 

 19 



17-5 



Height 

 r*j r mm 

 16 



14-5 - 



Height 



Breadth 



Breadth 



Length 



45-3 °<'o 

 53-9 - 

 5M - 



Only one specimen (from Hekla Havn] is so short in form, that it can be referred to the 

 typical Astarte Montagui; it has the following measurements: 



This specimen also differs in its sculpture, the shell only showing fine lines of growth and 

 not the usual concentric ribs. 2 ). 



Jan Mayen. 



None of the Danish Expeditions have found it here, but it is stated to have been taken by 



the Norwegian North-Atlantic Expedition as the variety globosa at a depth of 195 fin. (Friele) as also 



by the Austrian Expedition at a depth of 105 fin. (Bee her). 



The " 3anksh Leach var. Warhami" of Posselt in his East Greenland Molluscs (I.e. 1S95; PI. I, figs. 3— 4) 



has to be referred in my opinion to the variety striata owing to the relative shortness of the shell. 



1 It is this specimen which is figured by Posselt, I.e., figs. 1—2, under the name of Astarte Banksii Leach. 



