LARVAE OF DECAPOD CRUSTACEA 



337 



even so late as 1920, De Man included Naushonia in the Crangonidae, evidently not 

 having seen Thompson's paper. There can be no doubt that Thompson was right, and 

 the structure of the larva alone, apart from that of the adult, would be sufficient to 

 prove the relationship of Naushonia to Jaxea. 



Laomediidae D. I. (Fig. 38) 

 Discovery St. 708. 



Length 5-7 mm. 



Rostrum broad at base, abruptly narrowing into a sharp distal part. Carapace with- 

 out marginal spinules. Abdominal somites 2-4 with small pleural points; somite 5 



a. Side view. 

 e. Paragnath. 



Fig. 38. Laomediid D. I. 



b. Telson. c. Telson, stage I. 



/. Maxillule. g. Maxilla. 



d. Right mandible. 

 /;. Maxillipede i. 



with a pair of lateral spines. No anal spine. Telson about i J times as long as wide, with 

 small outer spine near end and large spine at each angle; posterior margin straight, 

 with very small median spine and 7 or 8 short spines on either side. 



Antennule unsegmented, with numerous setae along inner margin. Antenna with 

 endopod about as long as scale ; scale with distal spine ; basis with two small ventral 

 spines. 



