37 (36) Eyes without orbits; eyestalks retractile against acute postocular spine, affording 

 no concealment; proximal (fused) antennal article extremely slender (viewed ventrally) 

 Subfamily Inachinae 



38 



37 (36) Eyes with commencing orbits, each composed of cupped postocular process into 

 which eye retracts, and supraocular eave; proximal (fused) antennal article not ex- 

 tremely slender (viewed ventrally) Subfamily Pisinae 



39 



0: > ^ 



Figure 71. — Orbital areas of spider crabs in ventral view; A. Inachinae; B, Pisinae. 



38 (57) Fused proximal article of antenna terminating in single blunt spine. [Rathbun 



(1925) recognized New England form as subspecies marthae.] Euprognatha rastellifera 



Figure 72. — Euprognatha rastellifera, portion 

 of body in dorsal view. 



38 (37) Fused proximal article of antenna with compound lateral spines Collodes robustus 



Figure 73. — Collodes robustus, portion 

 of body in dorsal view. 



26 



