30 
T. Y. HODGSON. 
£ 
Ch.etonymphon mendosum. 
(Plate IV., fig. 3 ; Plate X., fig. 13.) 
Specific characters :— 
Body robust and tapering, articulation imperfect, lateral processes not widely separated, and with 
stout spines distally and dorsally ; no fine setae whatever. 
Ocular tubercle short and stout. 
Palp five-jointed, proportions of last three 5'5 : 1‘5 : 1’6. 
Oviger ten-jointed, denticulate spines few, with four teeth on each side, two of them prominent. 
Legs with five rows of spinous setae, without enlarged bases ; terminal claw with two small 
auxiliaries. 
This species is very closely allied to the last, but is much smaller, and presents 
other differences which are usually regarded as of specific rank. 
The Body is robust and slightly tapering, with stoutly developed lateral processes, 
the intervals between which are variable, widest but not very wide between the first 
and second pairs; the third and fourth being quite close together, the articulation 
between the two posterior pairs is not present. 
The Cephalon is short, anteriorly expanded into two diverging lobes; the neck 
is distinct, but very little constricted. 
The Ocular tubercle lies behind the neck, but not clear of the first pair of lateral 
processes. 
The Abdomen is horizontal, long, extending considerably beyond the first coxa, 
ovoid, tapering to a blunt point; it completely fills the space between the two posterior 
lateral processes. All this is in close agreement with the preceding species. The 
differences are :—The complete absence of fine setse from the entire body; the ocular 
tubercle is rather short, stout, and slightly inclined forwards, carrying four well- 
developed eyes with pigment on its rounded summit; the lateral processes all 
provided with two or three stout spines dorsally and distally; the spinous setse of the 
legs, while having the same arrangement as in the preceding species, are, on the whole, 
stronger in themselves, but without the enlarged bases. 
The length of the body is 6'5mm., and its width just exceeds 3mm. 
much larger; but ventrally, this joint and the coxae also are covered with normal setae. 
These spines are best developed on the first tibia, tv T o dorsal and tw r o lateral rows 
being conspicuous, a ventral row of much finer spines occurs. On the second tibia all 
these five rows occur, but the spines are rather finer. The setae of the tw T o terminal 
joints are small without the enlarged bases, but arranged in the same manner. The 
terminal claw is long and slender, and is accompanied by two quite small auxiliaries. 
The distal fringes of the various joints do not present any unusual features. 
The single specimen is a female, the Genital apertures are conspicuous on the 
second coxm of all the legs. 
Off the Barrier. January 27, 1902. 300 fms. Mud. 
Lat. 78° 25' 40" S., long. 185° 39' 6" E. 
