Pi/ATE XXXII. Fourth-Stage Lobster. 



The fourth-stage lobster at the age of fourteen days is about 14.3 mm. in length. 

 The chief modifications in this stage are the great change in the body-form, and 

 in detail, the following: the extension of the endopodites of the second antennae; 

 the relative small size of the eyes; the great development of the chelipeds; the 

 loss of the exopodites, or swimming attachments of the thoracic appendages; 

 the presence of functioning pleopods on the under side of the second, third, fourth 

 and fifth abdominal segments; the relative small size of the telson, compared 

 with the appendages 6f the sixth abdominal segment. The reproductive ap- 

 pendages do not appear on the imder side of the first abdominal segment (in male) 

 until about the eighth stage. The atrophied stumps of the exopodites of the 

 thoracic appendages do not appear in the drawing. 



