REPORT ON THE PYCNOGONIDA. 161 



PLATE XIX. 



Fig. 1. Bgg-m.a.ss, oi Nymphon breviGoUumjUoek; magnified 16 diameters. 



2. Transverse section of egg-mass of Nymphon brevicollum, Hoek; magnified 41 

 diameters, o, opening occupied by the ovigerous leg ; s, small pores left 

 between the eggs ; c, the substance soldering the eggs together ; m, mud. 



3. Transverse section of the egg of Nymphon brevicoUmn, Hoek ; magnified 272 

 diameters. 



4. Structure of the protoplasm of one of the segments of the same egg ; magnified 

 575 diameters. 



5. Cells of the blastoderm and segments of the nutritive yolk of Nymp)lion bi-evi- 

 Gcmdatmn, Miers ; magnified 272 diameters. 



6. Nuclei of the cells of the blastoderm of the egg of Nymphon brevicavdatum, 

 Miers ; magnified 575 diameters. 



7. Transverse section through the egg (jf Nymphon brevicaiidatum, Miers ; magni- 

 fied 94 diameters. 



8. Embryo of Nymphon brachyrhynchus, Hoek, showing the three pairs of append- 

 ages and the proboscis ; magnified 94 diameters. 



9. Front part of the embryo of Nymphon brevicaudatum, Miers, seen ventrally ; 

 magnified 135 diameters. 



10. The embryo of Nymphon brevicaudatum, Miers, ventral view; magnified 94 

 diameters. 



1 1 . Transverse section through the egg of Nymp)hon brevicaudatum, Miers ; 

 magnified 94 diameters, a, mandible ; b, first pair of legs ; c, d, second and 

 third pair of cephalic appendages. 



12. Larva of Nymphon brevicollum, Hoek, dorsal view ; magnified 94 diameters. 



13. Larva oi Nympjhon brevicollum, Hoek, ventral view; magnified 94 diameters. 



PLATE XX. 



Fio'. 1. Larva oi Nymphon brevicollum, Hoek; magnified 94 diameters. 



2. Spinning apparatus in the mandible of the larva of Nymphon brevicollum, Hoek ; 



magnified 94 diameters. 



3. Front part of the larva of Nymphon hamatum, Hoek ; magnified 94 diameters. 

 „ 4. Spinning apparatus in the mandible of the larva of Nymphon hamatum, Hoek ; 



magnified 272 diameters. 

 5. Spinning apparatus in the mandible of Nymphon longicoxa, Hoek ; magnified 

 272 diameters. 

 „ 6. Larva oi Ascorhynchus minutus, Hoek ; magnified 272 diameters. 



(ZOOL. OUALU liXP.— PART X, — 1881.) K 21 



