REPORT ON THE AMPHIPODA. 1538 



Genus Sympronoe, n. gen. 



Near to Parapronoe. 



First Gfnathopods simple, the wrist supplying no approach to a palm. 



Second Gnathopods complexly subchelate, the process of the wrist short and more or 

 less obtuse. 



Fifth Perasopods with the first joint not much expanded above and distally much 

 narrowed ; the two terminal joints minute. 



Uropods of the first and second pairs as in Parapronoe with the rami acute ; the 

 rami of the third pair short, broad, ending obtusely. 



Tel son very short. 



The name is derived from the Greek crw, with, and Pronoe, the name of the leading 

 genus in the family Pronoidae. Glaus, in his observations on the genus Parapronoe, says 

 that though the first gnathopods are simple, the wrist is so expanded that the limb mighl 

 be characterised as complexly subchelate. This, which applies well to Parapronoe 

 erustulum, is unsuited to the species of Sympronoe. Unfortunately Claus has not 

 described the first gnathopods of his Parapronoe parva, which must undoubtedly be 

 included in the new genus. He remarks of the first maxillae of Parapronoe that the 

 apex reaches far beyond the four submarginal teeth, which again is true of Parapronoe 

 rrustulum, but does not apply to Sympronoe. 



Sympronoe parva (Claus) (PI. CXCIL). 



1879. Parapronoe parva, Claus, Die Gattungen und Arten tier 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. xiv. fig. 13-18. 



Length and depth of the head about equal ; in a lateral view the lower part of the 

 front curve of the head becomes a little concave, where the upper antennas project ; the 

 rostral point is obtusely angled between the upper antennas ; the fifth is the longest of 

 the perseon-segrnents ; the first three segments of the pleon arc large, squared at the 

 postero-lateral angles ; the coalesced fifth and sixth segments form one that is considerably 

 longer than the fourth, narrowing gradually towards the distal end. The skin of the 

 specimen with the usual hexagonal markings, but also more or less covered with larger and 

 smaller circles as if of a crystalline coating, and spotted with orange in many parts. 

 The Eyes occupy most of the head, but do not reach the front or lower margin. 1 

 Upper Antennse. — The first joint of the peduncle widening distally, as broad as long, 

 the second and third joints incompletely developed ; the first joint of the flagellum very 



1 This limitation, however, may not apply to living specimens. 



