65 



The antennules, antenna?, and 1st maxillaa are as in Pasiphsea. 

 The branchial formula is as follows : — 



Total. 



e P- <3 5 = 11 + 3 ep. 



From Sympasiphxa this genus differs in having 2 arthrobranchia? to the external maxillipeds, 

 and a distinct epipodite to the 2nd maxillipeds : the body is less compressed, the dactylus of the 

 external maxillipeds differs in form, and the 5th pair of thoracic legs is not so much reduced in 

 length. 



Key to the Indian species of Parapasiphgea. 



I. The dorsal carina of the carapace is armed on the gastric region 

 only with about 5 teeth : the rostrum is a high compressed leaf, 

 with its tip deeply excised ... ... ... ... P. latirostris. 



II. The dorsal carina of the carapace is closely serrated in all its extent : 



the rostrum is an acute up-curved spine ... ... ... P, Gilesii 



32. Parapasiphcea latirostris, Wood-Mason. 



Parapasiphsea latirostris, Wood-Mason, Ann. Mag. Nat. Hist., Feb. 1891, p. 196, and Feb. 1893, p. 166 tie 2 

 Illustrations of the Zoology of the Investigator, Ckostauea, Plate HI. Fig. 1. 



Carapace and rostrum, measured in the middle line, not far short of the 

 length of the first six abdominal somites : the surface of the carapace is curiously 

 vermiculated with wrinkles. 



Rostrum a high thin strongly convex crest, reaching beyond the end of the 

 eyestalk but not beyond the eye, and having its tip broadly excised so as to form 

 two teeth : it is continued backwards, nearly to the posterior border of the cara- 

 pace, as a distinct carina the gastric portion of which is armed with 5 small 

 teeth. 



On the frontal margin the orbital and antennal angles are bluntly defined, 

 and instead of a branchiostegal angle there is a deep sinus : behind and above 

 the orbital angle is a minute spine, and above the branchiostegal sinus there is a 

 much larger one : from the latter spine a ridge runs nearly straight backwards 

 towards the posterior border of the carapace, giving off, on the hepatic re°-ion a 

 branch that runs obliquely backwards towards the very well defined lower 

 9 



