A NEW SPECIES OF IDOTEA. 201 



EXPLANATION OF PLATE 23. 

 Idotea Stephejiseni, n. sp. 



Fig. L Dorsal view of tlie cephalon. x <5. 



2. Doi'sal side of the left antennule. X 16. 



3. Dorsal side of the left antenna. X ^'5. 



4. Terminal style of the antenna. X 80, 



6. Ventral side of the terminal portions of the inner and outer lobes of the right 

 1st maxiila. X 45, 



6. Ventral side of the right maxillipede. X 22, 



7. Dorsal view ot" the lateral portions of the mesosoniatic segments, showing the coxal 



plates. X Jr. 



8. Ventral view of the 2nd thoracic appendage. X 12. 



9. Ventral view of the 8th thoracic nppendage. X 1 2. 



10. Bidentate seta fro-m the tttb thoracic appendage. X 160. 



11. Dorsal view of the metasome. X o. 



12. Left uropod. X o. 



Ail the figures are drawn from a male fpecinun. 



LINN. JOURN. — ZOOLOuy, VOL. XXXIII. 15 



