38 Puget Sound Marine Sta. Pub. Vol. 1, No. 7 



PLATE 5 



Abbreviations — ^=testis ; d'^union of two lobes of testis ; v. d.^=vasa 

 deferentia. 



Fig. 3. Hyas lyratus. XI- 



Fig. 4. Oregonia gracilis. Xl* 



Fig. 5. Enlarged drawing of terminal portion of vas deferent duct of 

 Oregonia gracilis, showing its structure. 



Fig. 6. Haemigrapsus nudus. XI- 



