The Sympoda. 143 



CERATOCUMA HORRIDUS, Caiman. 



1905. Ccratociiiiia horrida, Calinan, Fisheries, Ireland, 1904, I., p. 39, 

 pi. 4, fig. 57-75. 



This remarkable species has been fully described and figured by 

 Dr. Caiman. Briefly may be mentioned the numerous procurved 

 processes on the flattened oblong carapace, the expanded lateral 

 processes of the second and third pedigerons segments, the absence 

 of limbs from the fifth pedigerous segment (while both pairs of 

 antennae give evidence of maturity), the peculiar processes with 

 their dense tufts of radiating setae on the short sixth joint of the 

 first peraeopod, and the great length of the slender uropods, in which 

 the equal rami are very much longer than the peduncle. The only 

 point in which the South African specimen differs from Dr. Caiman's 

 description and figures is in a small bulbous expansion of the base 

 of this peduncle. The capacity of the telson for closing down over 

 the anal opening, when exercised, has the effect of obscuring its 

 existence. The South African specimen measures 4 mm. 



Locality. Cape Natal N. by E. about 24 miles ; depth 805 m. ; 

 No. 12605, sent by Dr. Peringuey. 



FAMILY HEMILAMPBOPID^E, n. 



Telson large, with more than two apical spines ; first antennae 

 with both flagella well developed; exopods on the first four pairs 

 of perasopods, but those on the third and fourth pairs only rudi- 

 mentary in the female ; first peraeopods with second joint much 

 shorter than the rest of the limb; three pairs of pleopods in the 

 male ; uropods with 3-jointed inner ramus. 



The system here followed makes it imperative to separate from 

 the Lampropidte those genera in which the male has three pairs of 

 pleopods. It seems also desirable to institute a family Paralampro- 

 pidaa for the genus Pandam-props, Sars, 1887, containing the species 

 P. scrratocostatns (Sars), 1885, and P. asper, Zimmer, 1907, this 

 family being distinguished from the Hemilampropidae by the first 

 maxillae, which here have no palp. That feature the family shares, 

 so far as is known, only with the Platysympodidae, but the latter 

 family has in the female exopods only on the first pair of peraeopods, 

 whereas in the Paralampropidae there are in that sex exopods on the 

 first four pairs, although, as often elsewhere, those on the third and 

 fourth perasopods are rudimentary. The genus Platysympns has a 



