170 



Puget Sound. Marine Sta. Pub. 



Vol. 1, No. 14 



When acid was added to the animals (table 7) they lost equilibrium 

 in a short time. The length of time to lose equilibrium was clearly cor- 

 related with the depth from which they came, but the relation is reversed 

 as compared with the results from fresh water and temperature. The 

 animals which came from the greater depths lost equilibrium later than 

 those from the shallower water. 



Table 8 shows the relations to alkaline water. Here again the species 

 from the greater depth showed the greater resistance to the alkali. 



Table 8. Showing the resistance of animals from differenth depths, to 



alkalinity. 



(T 



■a :t>° p 



(B -) » 

 OS n> 

 ' O 



3 



Bx 



D O 



Scientific Name and Common 





 01 _ n <-^ 



-°3 



Pandalus danae 



Pandalus stenolepis . 

 Paracrangon echinata 



Spirontoearis groenlandica Fabr 



Spirontocaris lamellicornis 



Crangon alaskensls 



Munida quadrispina Ben... 



Hyas lyratus Dana 



Blunt-nosed crab . . . . 

 Scyra acutlfrons Dana . . . . 



Sharp-nosed crab 



Pugettia gracilis Dana . . . 



Graceful kelp crab . . . 

 Cancer productus Rand.... 



Cancer crab 



Cancer oregonensis Dana.. 



3 a> 



4*** 

 20 

 4 



20 

 100 

 10 

 180 

 180 

 40-60 



40-60 

 40-60 



I 

 4-20 I 



4-20 



4-20 



4-20 I 



I 



4-20 I 



- 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 



1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 

 1 



„. o 



3 



O 1 (B C CD 



41 

 41 



41 

 41 

 41 



136 

 136 

 136 

 136 

 136 



S3 



3-" 



o 



tB 



O 3 



X ^ 



560** 

 iO-100 



110- 



I 200**1 



19 

 19 

 60 

 60 

 60 

 67 

 92 

 92 

 26 



26 

 38 



25 



24 hr. 



5 on side 



3 on side 

 Dead 

 Alive 

 Alive 

 Dead 

 Alive 

 Alive 



No response 



Recovered 



Responded 



Moved 



No response 



No response 



1 alive 



4 alive 



2 alive 

 All alive 

 All alive 



"Decidedly alkaline to phenolphthalein; not titrated. 

 **Maximum depth recorded outside of Puget Sound. 

 ***Green, from locality B, eelgrass. 



