96 K. ZIMMERMANN. 



C Enlarged view (diagrammatic) of a portion of the above, 



a. =antennules. 



m. =plate-like endopodite of VIII. 



fi. =flagellum at work. 

 ex. = ex-current stream. 



S. =Spirorbis tube on chela. 



Plate 3. 



A. Side view of branchial cavity of G. squamifera, gills removed (diagram- 

 matic). 



c. =cut edge of body- wall, etc. 



In. =inhalent aperture. 



Ex. =exhalent aperture. 



Gr. = position of groove. 



r. =line of a not prominent ridge. 

 A ii, B i and ii, and C i = diagrams of various branchial cavities in T.S. 

 A ii. Of G. squamifera. 



B. Of P. platycheles (i, near front end ; ii, further back). 

 C i. Of C. pagurus. 



B iii. =Branchiostegite of P. platycheles, inner surface. 

 C ii. = Branchial cavity of Cancer exposed. 



r. = ridge. 



br. =branchiostegite. 



c. =cut edge of carapace. 

 D. = 3rd maxillipede of G. squamifera (right side). 

 E.= ,, ,, ,, P. platycheles „ 



F.= ,, ,, ,, C. pagurus „ 



en. = endopodite. 



ex. = exopodite. 

 G. = Antenna of C. pagurus, with Algal growth. 



Plate 4. 



Drawings of single hairs (much enlarged). 



A. Simple hair, e.g. " shaggy hairs " of P. platycheles. 



B. Once-pinnate hair, on carapace ridges of Galathea, also fringing the 



branchiostegite in G. squamifera. 



C. In-sweeping hair, on last two joints of endopodite of 3rd maxillipede 



in Galatheidea. 



D. Epipodite hair. 



^. Filter hair, fringing branchiostegite, etc., in G. intermedia, G. nexa, 

 and Munida suhrugosa. 



