113 



PI. MI. 



Pseudocuma cercaria (continued) : adult male. 



I'l. Mil. 



Pseudocuma similis, G. <> Sars; female and 

 male. 



Tl. LIV. 



Petalosarsia declivis, G. 0. Sars; female and 



male. 



1M. LV. 

 Cumella pygmaea, G. O. Sars; temale and male. 



PI. LVI. 



Campylaspis rubicunda (Lilljeborg) ; female 

 and male. 



PI. LVII. 



Campylaspis rubicunda (continued); female 



and male. 



PI. LVIII. 



Campylaspis glabra, G. O. Sars; female and 

 male. 



PI. LIX. 



Campylaspis SLllcata, G. 0. Sars; female and 

 male. 



PL LX. 



Campylaspis COstata, G. 0. Sars; female and 

 male. 



PL LXL 



Campylaspis undata, G. 0. Sars; female and 

 male. 



PI. LXII. 



Campylaspis horrida, G. 0. Sars; female and 

 male. 



PL LXIII. 



Campylaspis verrueosa, G. 0. Sars; female 

 and male. 



PL LXIV. 



Campylaspis afflllis, G. 0. Sars; female and 

 male. 



PL LXV. 



Internal Anatomy of Cumacea (Diastylis 

 lucifcra). 



Fig. 1. Anterior part of body together with 

 the first 3 caudal segments of a young, 

 imt yet gravid, female. vieAved from 

 1 ii side. Inner organs delineated 

 within the body in their natural posi- 

 tion. - ocular tubercle ; M. man- 

 dible ; lir. exp. exopodal part of bran- 



chial apparatus : w. scale-like terminal 

 piece of same; '</. <'/>. epjpodal part 

 Of branchial apparatus : nl . -tomach ; 

 ?'. P. tlir :; li\cr-sacs nn leftside; i 

 intestinal t ube : l>. \n-.n t : //. nc|)liridium 

 (renal organ); f'.i/l. cepha | \,- _,;, n L , | ion ; 



<//. ventral ganglionic chain; ov. left. 



nvarial sac: /'/if. ]>!. incu hat.ory plates 

 in process <>!' l'< irinat inn. 



Fig. 2. Anterior part .of intest inal trad, viewed 

 from left side. oes. oesophagus ; .v/. 

 stomach; jir. v. anterior triturating 

 part of same: /' P the '.'> liver-sacs 

 on left side; /. intestinal tube. 

 3. Anterior part of stomach, more highly 

 ma-nilied. exliibiting the trit urat inu 

 apparatus: late:a[ view. 



,. 4. Same part \ie\veil from the ventral 



face. 



5, (i, 7. S ta and pectin! form fillets of 

 the triturating apparatus. highly 

 magnified. 



., 8. Hxtremity of a liver-sac. 



9. Some of the secretory cells from, same, 



highly magnified. 



10. Schematic transverse section of body 

 behind the middle of the carapace, 

 exhibiting the internal organs in sec- 

 tion. Lettering as in fig. 1. 



11. Another transverse section of body 

 through about the 2nd exposed seg- 

 ment. Lettering as above. 



PL LXVI. 

 Inner Anatomy of Cumaeea (continued). 



Fig. 1. Anterior part of body together with 

 the first 2 caudal segments of a female 

 JtiftshjJis hirlfcra, viewed from the 

 dorsal face. Inner organs delineated 

 within the body in their natural po- 

 sition. Lettering as in fig. 1 on the 

 preceding plate. 



2. Central nervous sj^stem of same spe- 

 cies, viewed from the dorsal face. 



3. Cephalic ganglion together with the 

 cesophageal commissures, viewed from 

 the dorsal face. 



4. Two of the ventral ganglia with their 

 connecting commissures; dorsal view. 



5. Two ganglia, with their commissures, 

 from the caudal part of the nervous 

 chord. 



(i. Left renal organ. 



7. One of the lobules of same, more 

 highly magnified, and showing the 

 finely granular contents. 



8. Ocular tubercle of same species, ex- 

 hibiting trace of its original duplicity; 

 dorsal view. 



9. Anterior part of the intestine, with 

 the liver-sacs (Diastylis) : ventral view. 



