REPORT ON THE AMPHIPODA. 1447 



Uropods. — The first and second pairs are in near agreement with those of Primno 

 gwrini; the third pair differ by the smoothness of the margins, the outer having four 

 indents, distant, the intervals not pectinate ; in all three specimens examined the distal 

 ends of this pair were broken, an accident which might easily happen to structures of so 

 slight a texture. 



Length. — The specimen, in the position figured, measured, in a straight line from the 

 front of the head to the end of the uropods, a fifth of an inch. 



Locality. — Station 164d, June 14, 1874; east of Australia ; lat. 34° 3' S., long. 

 152° 20' E. ; surface; surface temperature, 67°"5. Three specimens, two males, one 

 female. 



Remark. — The specific name is given in honour of the celebrated French naturalist, 

 Latreille. 



Primno menevillei, n. sp. (PL CLXX1X., B.). 



This species closely resembles Primno macropa in general form and appearance ; the 

 first two segments only of the pleon carinate. 



Upper Antenna?. — The peduncle of one joint longer than wide, slightly widened 

 distally ; the long joint of the flagellum nearly as in the female of Primno macropa, 

 with a short row of four pairs of filaments, below which a transverse wrinkle gives the 

 appearance of a division of the joint into two. 



The left mandible, lower lip, first maxilla, and second maxilla of the left side, are 

 figured in position in the Plate, both from the outside and the inside. In the figure of 

 the outer side (on the right hand in the Plate), it will be noticed how the convexity of 

 the lower lip, between the front lobe and the mandibular process, fits the concavity of 

 the lower margin of the mandible ; in the left hand figure, the mandibular jjrocess of the 

 lower lip and its hairy front lobe will be seen peeping out on either side of the molar 

 tubercle of the mandible which hides the central part of the lower lip. 



The finger, nail, and distal part of the hand of the first gnathopod are more highly 

 magnified in one of the figures of the species, to show the character of the pectinate hairs 

 on the margin, but this character belongs also to the other species. It is not always 

 easily observed, because its prominence depends on the particular position in which the 

 joints are seen. The true length of the finger is often obscured by its not being out- 

 stretched. 



Second Gnathopods. — The first joint greatly dilated. 



First Perseopods. — The front end of the side-plate is rounded. 



Third Perseopods. — The first joint is not very much wider below than above; the 

 teeth of the front margin of the wrist are as follows, the first short, slightly indented on 



