CALLIOPIIDAE 155 



triangular curved lamina, its outer margin with a few spinules, its distal margin smooth, 

 with one small spinule at rounded inner apex. Maxilla 2, both lobes large, rounded and 

 projecting inwards. Maxilliped, outer plates set in same plane as inner plates, i.e. not 

 overlapping the latter and therefore widely separated, not very much larger than the 

 inner plates, palp well developed, extending beyond apex of outer plate. 



Gnathopod 1, 2nd joint slightly expanding distally, 5th inserted near base of upper 

 margin and on outer side of 4th, moderately expanded, 6th considerably shorter than 

 5th, broadly ovate, simple, margins of all joints, especially on hinder and lower margins, 

 with long setae. Gnathopod 2 similar, but longer and more slender. 



Peraeopods 1 and 2, 5th joint shorter than 4th and 6th, which are subequal, hind margin 

 of 6th with fascicles of spinules . Peraeopod 2 more slender than peraeopod 1 . Peraeopods 

 3-5 slender, 2nd joint not strongly expanded, narrow ovate, hind margin smooth. 



Peraeopods 3 and 4, 4th and 5th joints subequal, shorter than 2nd, 6th elongate, 

 longer than 2nd and nearly twice as long as 5th, anterior margin with groups of spinules, 

 7th one-quarter length of 6th. Peraeopod 5 as long as peraeopods 3 and 4, 6th joint only 

 a little longer than 4th or 5th, but 7th almost as long as 6th, and slightly expanded into 

 a narrow lanceolate form resembling the blade of an oar, its anterior margin set with 

 spaced spinules, unguis not distinct from the joint. 



Uropods 1 and 3 extending about equally far back, uropod 2 shorter; rami of uropod 

 1 subequal, outer ramus in uropod 2 shorter than inner, in both uropods narrow, 

 acuminate; in uropod 3 rami subequal, narrow lanceolate, outer ramus with minute 

 unguiform terminal joint. 



The colour is recorded as " thoracic segments and legs chocolate, abdominal segments 

 white, eyes pink". As preserved, the brown colour affects the head and peraeon seg- 

 ments 1-4 or 5 (though paler and seemingly bleached in the more dorsal portions), the 

 side-plates 1-4, mouth-parts, gnathopods, peraeopods 1 and 2, together with the 

 branchiae on gnathopod 2 and peraeopods 1 and 2. The posterior half of the peraeon, 

 with peraeopods 3-5, and the pleon with its appendages, and the antennae are milk- 

 white. The eyes are a pale glistening yellow. The generic and specific names have been 

 suggested by this "chocolate and milk" coloration 



Family CALLIOPIIDAE 



Stebbing, 1906, pp. 285, 727. 

 Schellenberg, 1925, p. 147. 

 Barnard, 1930, p. 369. 



Genus Clarencia, Brnrd. 



Barnard, 1931, p. 428. 



No rostrum. No eyes. Peraeon segments becoming imbricate posteriorly. Pleon 

 segments 1-3 carinate; segment 4 long. No accessory flagellum. Upper lip rounded. 

 Lower lip with inconspicuous, apparently fused, inner lobes. Other mouth-parts 

 normal. Gnathopod 1 subchelate. Gnathopod 2 very large, chelate. Peraeopods 1-5 

 subsimilar, stout. Telson and uropods ?. 



