MARINE GAMMARIDEAN AMPHIPODA 



183 



Possibly the primary cutting edge of the colomastigid mandible 

 is missing and the digitations represent enlarged and basally fused 

 spines of the normal gammaridean spine-row. 



Corophiidae and Podoceridae may resemble Colomastigidae be- 

 cause of depressed and subcyhndrical bodies but the former two 

 families have mandibular palps and normal maxillipeds. 



Figure 75.- — Colomastigidae: a, Colomastix pusilla Grube (J. L. Barnard, 1955a). Telson: 

 b, C. pusilla; c, Colomastix suhcastellata Hurley (1954d). Mandible: d, C. pusilla. 

 Maxilla \: e, C. suhcastellata; /, C. pusilla. Maxilla 2: g, C. suhcastellata; h, C. pusilla. 

 Maxillipeds: i, C. suhcastellata; j, C. pusilla. Uropod 3: k, C. pusilla; I, C. magnirama 

 Hurley (1954d). Gnathopod 1, C. pusilla: m, female; n, male. Gnathopod 2, C. pusilla: 

 0, male; p, female. 



