PLATE CI, 



Alpheus avarus (p. 544). 

 Fig. 1. Lateral view ; enlarged twice. 



Alpheus neptunus (p. 563). 



„ 2. Lateral view ; enlarged twice. 



„ 2k. First pereiopod ; larger chela, left. 



„ 2k'. First pereiopod ; smaller chela, right. 



Alpheus gracilipes (p. 561). 



:;. Lateral view ; enlarged three times. 



, 3c. Cephalon, frontal region. 



, 3/\ First pereiopod ; larger chela. 



, 3m. Third pereiopod ; terminal joints. 



, 3z. Telson. 



Alpheus biunguiculatus (p. 562). 



, 4. Lateral view ; enlarged three times. 

 , 4o. Fifth pereiopod ; terminal joints. 

 , 4z. Telson. 



Betams malleodigitus (p. 565). 



, 5. Lateral view ; enlarged three times. 



, 5c. Cephalon, frontal region. 



, 5c. Second antennae ; scaphocerite. 



, 5k. First pereiopod ; larger chela. 



, 51. Second pereiopod. 



, 5p. First pleopod, with parasites attached to peduncle ; stylamblys detached and 



enlarged. 



, 5par. Parasitic vesicle, detached ; escaped ovum, enlarged. 



, 5z. Telson. 



Betieus microstylus (p. 566). 



, 6. Lateral view ; enlarged three times. 



, 6c. Cephalon, frontal region and scaphoceritcs. 



„ 6c. Second antennae ; scaphocerite, enlarged. 



„ 6z. Telson. 



