72 PROCEEDINGS OF THE NATIONAL MUSEUM vol.87 



Table 1. — Average measurements of Hederelloidea described herein 



(The species of each genus are arranged on the basis of zooecial width as the most convenient factor for 



identification and comparison) 



Name 



Hederella: 



reRularis 



concinnoides. 



delicatula 



canadensis... 



consimilis 



arachnoidea.. 



tenera 



colbornensis.. 

 concinna 



cirrhosa 



angulata 



rectlfurcata. 



chesterensis 



bilineata 



aequidistans. 

 helderbergia.. 



alternata 



linearis.- 



ramea 



conferta. 



clarkei... 



parallels. 



varsoviensis.. 

 parvirugosa.. 



siliiriana 



vagans 



contort ilis 



alpenensis 



calvini 



louisvillensis... 



triseriata. 



flliformis 



brownae.- 



germana 



occidentalis 



camdenensis 



blainvillei 



pavilionensis... 

 graeilior 



persimills 



romlngeri 



halyson 



crassillnea 



nicbolsonl 



Illustration 



PI. 8, figs. 1-2 



PI. II, flg. 9 



PI. 11, figs. 1-8 



PI. 7, figs. 2-4 



PI. 5, fig. 12 



PI. 13, flg. 7 



PI. 7, figs. 7-9 



PI. 7, fig. 1 



PI. 7, figs. 10-15; pi. 

 15, fig. 2. 



PI. 6, figs. 1-8 , 



PI. 7, figs. 5, 6 , 



PI. 7, flg. 16 



PI. 6, figs. 9-11 



PI. 5, flg. 9 



PI. 9, flg. 6 



PI. 8, fig. 3 



PI. 5, figs. 1-3 



PI. 5, figs. 6, 7 



PI. 13, flg. 10 



PI. 9, figs. 4, 5... 



PI. 10, fig. 3 



PI. 2, figs. 1-2 



Zoo- 

 ecial 



WIDTH 



PI. 9, flg. 1 



PI. fi, flgs. 12-14. 



PI. 13, flg. 3 



PI. 4, flgs. 1, 2... 

 PI. 8, figs. 5-8... 

 PI. 3, figs. 1-6... 

 PI. 9, fig. 2 



PI. 5, fig. 8 



PI. 2, flg. 3.... 



PI. 1, flgs. 1-6. 

 PI. 1. fig. 13... 

 PI. 4, flg. 6.... 

 PI. fi, flg. 15... 

 PI. 6, fig. 16... 

 PI. 13, flg.fi... 

 PI. 4, flg. 5.... 

 PI. 3, fig. 12... 



PI. 2, figs. 4, 5- 

 Pl-9, flg. 3.... 



PI. 5. flgs. 4, 5; pi. 2, 

 flg. fi; pl. 12, fig. 1. 



PI- 4, fig. 4; pl. 13, 

 figs. 4, 5. 



Pl. 4,flgs.8,8';pl. 12, 

 flg. 4. 



Mm. 

 0.15 

 0.15 

 0.15 

 0.2 

 0.2 

 0.25 

 0.25 

 0.3 

 0.3 



0.3 

 0.3 



0.3 



0.3 

 0.3 

 0.3 

 0.35 

 0.35 

 0.35 

 0.35 



0.35 



0.35 

 0.35 



0.35 



0.35 



0.4 



0.4 



0.4 



0.4 



0.4 



0.4 



0.5 

 0.5 

 0.5 

 0.5 

 0.5 

 0.5 

 0.5 

 0.5 



0.5 



0.5 

 0.65 



0.6 



0.6 



Zoo- 

 ecial 



LENGTH 



Mm. 

 0.6 

 1 



0.8 

 0.7 

 1.0 

 1.3 

 1.3 

 1.25 

 0.75 



L5 

 0.5 



Short 



2.5 

 1.0 

 2 

 2 

 1 



1.2 

 3 



1.5 

 2 



2 



1 



1-2 



1 



1.5 



1.1 



2 



1.5 



1 



1.6 



1.6 



1.6 



1.6 



2-3 



2-4 



1.5 



2.2 

 2 



1.3 



2 



ZOOECIA 

 IN 5 MM. 



Angle of 



BUDDING 



5 



4-6 



3-4 



6 



4 



3 



4-5 



6-6 



2-3 

 1-2 



2-3 



3 

 6-6 

 2-3 

 3 

 4 

 3 



4 



2H-3 



2-3 



4 



2 

 3 



4-5 

 2H 



4 



4 



1-2 



3-3H 

 3 



About 3 

 3 



2H-3 



2^-3 



Interval 



BRANCH- 

 ING 



Angle or 



BRANCH- 

 ING 



45° 

 60° 

 45° 



Acute 

 25° 

 35° 

 45° 



Acute 

 30° 



30-45° 

 45° 



90° 



45° 



Acute 



Acute 



45° 



45° 



30° 



30° 



[About 



45° 



Acute 



Acute 



Acute 



45° 



90° 



30-45° 



50-60° 



Acute 



Acute 



About 



25° 



About 



25° 



46° 



45° 



Acute 



60-90° 



45° 



80° 



30"' 



Acute 



30° 



Acute 

 25° 



46° 



35° 



Mm. 



3-5 



2.6 



1.5-6 



5 



6 



1.5-2 



4 



6 



1.6-3 



3 



3 



4-6 



3H 



6H 



3 



3 

 8 



3 



7 



2 



15-1- 



3 



5 

 10 



60° 

 90° 

 30° 

 90' 

 90° 

 45° 

 60° 

 90° 



90° 

 bout 



90° 

 45-60° 

 60-90° 



90° 



5.5 

 3 

 12 

 3 



6-7 

 6 



6-10 

 6-(l 



90° 

 60° 

 30° 



45° 



45° 



.bout 



45° 



30° 



90° 



60° 

 60° 

 30° 

 bout 

 50° 



45° 



90° 



60° 



90° 



60-60° 



30° 

 46° 

 60° 



[About 

 46° 



About 

 20° 

 60° 



90° 



46°- 



