110 THE NAUTILUS. 



great scallop, six or seven inches in diameter, is good eating, and we 

 lay them aside to appear later in a different form on the breakfast 

 table. The large stones and dead shells are looked over carefully 

 and we find attached to them the Crucibulnm striatum, and the Chi- 

 tons, Tonicella marmorea, Tachydermon albas, and the Tachydennon 

 ruber. On a previous trip we dredged a single, fine specimen of the 

 Hanleya mendicaria. This rare Chiton is usually found in much 

 deeper water than the bay. 



The remaining sand and mud is now poured into large sieves with 

 handles and looked over carefully. We find alive the beautiful 

 Margarita obscura, Margarita undulata and Margarita cinerca. 

 These are not uncommon, however, and are hurried into the glass 

 jars of water, to be studied later under the microscope. We are 

 always glad to find the Scalaria groenlandica, though we find few 

 alive. Many kinds of Bela are found, among which are the common 

 Bela incisula, also the Beta scalaris, Bela harpularia, B?In plcnroto- 

 maria, and the more rare Bela violacea and Bela gouldii. Also in 

 this section we find the Velutina halio'oidea, Tricliotropis boreulis,-<\\\& 

 the Lunatia groenlandica, and the Trophon clathratus. 



The contents of the sieves are now washed over the side of the 

 scow; the mud washed away and the cleaned sand and shells poured 

 into pails, labelled with the station, depth of water and c.haracter of 

 bottom, to be looked over after being dried at home. 



A great many specimens are in this way obtained, and much ma- 

 terial collected to be separated on rainy days. 



We move on now a quarter of a mile to a station \\iili muddy bot- 

 tom at 2o fathoms, where in a few hauls of black, sticky mud we find 

 numbers of Ledatenuisulcata, Yoldia t/traciac, trim's and Yoldiasupo- 

 tilla, with quantities of Astarte uiidnta, Cardita borcalfs, a few of [he 

 Card.it d novangliae, Cardtum pinnulatnm, Tliracin frnn<-atn t silso, of 

 course, great numbers of Nucula proximo, Nacula di'Iplu'no<lonla and 

 Nucula tennis. 



Another haul nearer shore, on harder bottom, brings us Rissoa 

 carinata and Rissoa exarata. Here also we .find the Clirysodomus 

 decemcostalm, the Siplio stimpsonii and Siplio pyymueit*, and a few 

 young Serripes groenlamficus, with the pretty zig-xag markings which 

 disappear in the older specimens. 



The material is also washed and sifted after being picked over, 

 and with aching backs we rest in the scow as we go ploughing 



