1530 THE VOYAGE OF H.M.S. CHALLENGER. 



The Maxillae and Maxillipeds presented no specially distinctive features. 



The Gnathopods are like those of Parapronoe crustulum, differing therefore from 

 those of Parapronoe clausi. 



The First, Second, and TJiird Perseopods as in the two compared species. 



Fourth Perwopods. — The front and hinder apices of the first joint on a level ; 

 the third joint as in Parapronoe clausi, with the process more than half the length 

 of the fourth joint, not less than half that of Parapronoe crustulum; the finger 

 minute. 



Fifth Perseopods with the second joint much shorter than the third, which is longer 

 than that in Parapronoe clausi, the end of the first joint being also more broadly rounded 

 in this species than in that. 



Uropods. — The first two pairs very nearly as in the two other species, but the 

 peduncles of the second pair less differing in length from those of the first pair ; the rami 

 of the third pair subequal in length, both of them broad, the chief narrowing not beginning 

 till near the apex, the outer armed as in Parapronoe crustulum, the inner with smooth 

 outer margin, the inner margin smooth along the upper half, then faintly pectinate and 

 more strongly near the apex. 



Telson nearly as long as the third uropods, nearly twice as long as the breadth 

 at the base, not regularly triangular, since the sides converge near the apex much more 

 rapidly than in the upper part ; the apex is blunt. 



Length, fully extended, over half an inch. 



Locality. — June, 1874 ; between Sydney and Wellington ; surface. 



Remarks. — The specific name points to the likeness between this species and that 

 named Parapronoe clausi. From Parapronoe crustulum, Claus, it is distinguished by 

 the more prolonged third joint in the fourth perseopods, the two terminal joints of the 

 fifth perseopods, and by characters of the uropods and telson. 



Parapronoe crustulum, Claus (PI. CXCIIL, A.). 



1879. Parapronoe crustulum, Claus, Die Gattungen und Arten der Platysceliden, p. 31. 



1887. „ „ Bovallius, Systematical List of Amph. Hyper., Bihang till K. 



Svensk. Vetensk.-Akad. Handl., Bd. 11, No. 16, p. 42. 

 1887. „ „ Claus, Die Platysceliden, p. 55, Taf. xv. fig. 1-15. 



Head rounded ; the postero-lateral angles of the first two pleon-segments acutely 

 outdrawn, of the third segment squared, the lower margin of the first segment deeply 

 emarginate, so as to form a second angle below and in front of the postero-lateral angle ; 

 the fourth segment much shorter than the following composite segment ; the whole body 

 except the head dotted with little dark spots. 



Eyes extremely dark. 



