44 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8 = 



4. (X2.) A few thoracic exopodites in which the flattened fila- 



ments are unusually well preserved. 



5. (X4.) Side view of a flattened specimen showing the outlines 



of body through the carapace, the stalked eye, antennae, four 

 cephalic limbs, and several thoracic limbs. 



This specimen is particularly instructive, as it shows the 

 outline of the thoracic limbs from the bodv to their distal end. 



Plate 19 



PAGE 



Waptia fieldensis Walcott 20 



Fig. I. (X2.) Anterior portion of an individual showing the limbs. 



2. (X2.) Unretouched photograph of a distorted specimen show- 



ing the eye particularly well. 



3. (X 2.) Dorsal view of the carapace of a specimen showing the 



outline of the body, also the small rostrum between the 

 the antennae and the eyes. 

 4- (X3-) Specimen with details of eyes and antennae. 



Plate 20 



PAGE 



Waptia fieldetusis Walcott 20 



Fig. I. (X 2.) Posterior portion of specimen preserving the three seg- 

 ments, the anal opening, and the lobed, segmented caudal 

 furca. 



2. (X3-) Anterior portion of a carapace, median rostral plate, 



antennae, stalked eyes, and a palp on the left side. 



3. (X 2.) Side view of a flattened specimen in which a number of 



the exopodites retain the fringing filaments, some of the latter 

 being gathered in a cluster at the distal ends. This specimen 

 also shows the outlines of elongate triangular, light-colored, 

 shiny places that may indicate the interior of the exopodite 

 or possibly a rudimentary endopodite. 



Plate 21 



PAGE 



Skania jragilis Walcott 25 



Fig. I. (X4-) Specimen showing the flattened intestine and outline 

 of thoracic segments. 



Waptia fieldensis Walcott 20 



Fig. 2. (X2.) Dorsal view of a flattened specimen in which the cara- 

 pace has been removed from over the cephalic area and por- 

 tion of the thoracic region. The proximal portion of eight 

 thoracic limbs is clearly shown, also of three pairs of cephalic 

 limbs. 



