86 Transactions. — Zoology, 



EXPLANATION OF PLATES I.— III. 

 Plate I. 

 Fig. 1. Scntvloidea maculata x 12; a, inner antenna x 40 ; b, auditory seta from same, 

 more highly magnified ; c, mandible x 40 ; d, first maxilla X 40 ; e, second 

 maxilla X 74; /, seta from outer lobe of same highly magnified ; g, inner lobe 

 of same x 160 ; h. maxillipede x 40 ; fc, first thoracic leg X 15 ; I, end of 

 same x 40 ; m, second thoracic leg x 15 ; n, end of same x 40 ; o, one of the 

 pleopoda x 30 ; p, abdomen from below x 12. 



Fig. 2. Hymenosoma lacitstris; a, third (external) maxillipede x 10; 6 and c, different 

 forms of setas from the same, more highly magnified ; d, chela of male x 8 ; 

 e, abdomen of male x 15. 



Fig. 3. Gubaris rugulosus ; a, inner antenna x 40 ; b, outer antenna x 10; c, scale-like 

 markings on the integument x 120. 



Fig. 4. Anthura affinis ; a, antennas from above X 23; b, first thoracic leg X 15; c, second 

 thoracic leg x 13 ; d, extremity of same, more highly magnified ; e, abdomen, 

 with telson and last pair of pleopoda, from above, x 30 ; /, first pleopod x 30. 



Fig. 5. Plakarfhrium typicum x 12; a, inner antenna x 18; b, outer antenna x 18; 

 r, mandible X 120 ; d, first thoracic leg x 18 ; e, extremity of same X 75 ; 

 /, third thoracic leg x 40 ; g, one of the pleopoda X 30 ; h, another form of 

 the pleopoda X 30 ; h, last pair of pleopoda X 24. 

 Plate II. 



Fig. 1. Limnoria segnis ; a, antennas from above X 60; b, mandible X 120; c, maxilli- 

 pede X 120 ; d, appendage of sixth segment of pleon X 40. 



Fig 2. Nicea egregia, female x 6; a, portion of fiagellum of upper antennas Avith audi- 

 tory cilia X 40 ; b, portion of flagellum of lower antenna x 60 ; c, mandible 

 X 40 ; d, maxillipede x 60; c, first gnathopod X 30 ; /, second gnathopod of 

 fully developed male X 13 ; g, second gnathopod of young male X 13 ; h, 

 transverse section through one of the segments of pereion of male X 15 ; 

 fe, extremity of pleon X 30 ; I, telson, from above X 40. 



Fig. 3. Moera spinosa ; a, second gnathopod of female, which is the same as second 

 gnathopod of left side of male X 13. 



Fig. 4. Moera petriei ; a, second gnathopod of female X 13. 



Fig. 5. Harmonia crassipes ; a, first gnathopod of female X 35 ; b, second gnathopod of 

 female X 35. 



Plate III. 



Fig. 1. Cyproidia (?) erassa X 30 ; a, upper antenna, and b, lower antenna, in position, 

 X 70 ; c, first gnathopod X 70 ; d, telson and three posterior pleopoda from 

 above X 120. 



Fig. 2. Podocerus frequens X 30 ; «, first gnathopod X 40 ; b, second gnathopod of male 

 X 30 ; c, extremity of pleon X 70. 



Fig. 3. Moera incerta X 13; a, first gnathopod X 30 ; b, second gnathopod X 30 ; c 

 fifth pereiopod X 30 ; d, dactylos of same X 120 ; c, telson and last pah of 

 pleopoda from above X 30. 



