igiS.] R. B. S. SewelIv : New spe cies of Copepoda. 7 



The 1st antennae. — That on the left side is unmodified and has 

 the following proportional lengths of the segments : — 



Segments i : ^ : 3 : 4 : 5 : 6 : 7 : 8 : 9 : 10 : n : 12 : 13 : 14 : 15 : 16 : 

 65 : 55 : 25 : 30 : 30 : 42 : 20 : 20 : 30 : 38 : 50 : 55 : 62 : 63 : 65 : 58 : 

 17 : 18 : 19 : 20 : 21. 



47 : 55 : 55 : 60 : 75. = 1000 



The right antenna is as usual modified to form a grasping 

 organ : the various joints have the following proportional 

 lengths : — 



Segments ^ : 2 : 3 : 4 : 5 : 6 : 7 : 8-9 ; 10 : 11 : 12 : 13 : 14 : 15 : 16 : 17 ; 

 68 : 50 : 17 : 14 : 15 : 13 : 9 : 50 : 15 : 20 : 22 : 26 : 64 : 57 : 61 : 57 : 

 18 : 19 : 20-21. 

 128 : 117 ; 194 = 1000. 



The " endabschnitt " consists of two joints onl}' and the 

 knee-joint lies between segments i8 and 19 : segments 13 to 17 are 

 swollen; segment 17 bears on its anterior margin proximally a 

 rounded chitinous plate ; segment 18 has a tooth-plate which 

 extends for | of the length of the segment ; segment 19 bears two 

 spine-like tooth-plates, the proximal being short and armed with 

 curved teeth. 



The 2nd antennae, mouth-parts and swimming legs are similar 

 to those of the 5 . 



The ^th pair of legs. — The right leg consists of three segments. 

 Exopod I is produced internally in a spinous process and is armed 

 with a transverse row of spines on its outer margin ; exopod 

 2 is prolonged internally in a lamelliform plate bearing two spine- 

 like processes, a proximal short and claw-like and a distal one much 

 longer and straight; exopod 3 is curved, terminating in a sharp 

 point and bears a single seta on its inner margin. The left leg 

 consists of three segments ; exopod r is produced internally in 

 a large irregularly triangular plate ; exopod 2 is produced inter- 

 nally in a stout spinous process at the base of which is a short 

 stout spine; exopod 3 bears a serrated spine on its outer margin 

 and terminates in two sharp chitinous teeth. 



Pscudodiaptomus binghami, Sewell. 



Associated in the Chilka Lake collection with large numbers of 

 P. hinghami 9 and a few examples of P. lobipes were several 

 unknown males. The female P. hinghami was described by 

 me from a collection made in the Rangoon River estuary, and I 

 believe that the following form is the hitherto unknown cf of this 

 species : 



&. Total length = o'86mm. 



Proportional length of cephalo- thorax and abdomen — 



64'5 : 35'5 = 1000. 



The head and ist thoracic segment are fused, as also are 

 thoracic segments 4 and 5. The forehead presents a uniform 



