90 DISCOVERY REPORTS 



a small lobe bearing plumose setae, 5th and 6th joints as in peraeopod 3. Peraeopod 5, 

 2nd joint with anterior margin straight, hind margin strongly expanded, the lower 

 margin slightly oblique, plumose setae on lower margin and continued round on to 

 margin facing 3rd and 4th joints, 5th joint broad, with transverse rows of spinules on 

 anterior margin, and spines in notches on hind margin, 6th abruptly narrower, linear. 



Uropod 1, rami shorter than peduncle, narrow, acuminate, inner shorter than outer. 

 Uropod 2, rami subequal, shorter than peduncle, narrow, acuminate. Uropod 3, rami 

 extending beyond the others, inner ramus slightly shorter than outer, apices upturned, 

 inner margins of both with spines and setae, setae more abundant in <$ than $. 



Branchial lamellae pleated on both sides. 



Colour of no. 2 recorded for the two large <$$ as " Pale yellowish buff, blotched with 

 salmon on lower edges of all somites, on basal segments of last 3 thoracic legs, pleopods 

 and uropods. Eyes dark crimson, with crimson markings on adjacent parts of head". 

 Note 102 for St. 153 gives the colour as " Cream-coloured. Fore part of head splashed 

 with crimson and with purple eyes. Coxal plates of thoracic limbs and posterior end of 

 abdomen tinged with salmon-red". 



Remarks. This fine species is distinguished from the other species by the rounded 

 postero-inferior angle of pleon segment 3, and particularly by the enlarged 2nd joint of 

 peraeopod 5. The specific name refers to the 4th side-plate which here assumes a more 

 even, chopper-like shape than in the other species. 



Note 102 refers to the tubes which were collected at St. 153: "Tubes are from 45- 

 50 mm. in length and oval in cross-section with a major diameter of about 10 mm. They 

 are quite straight and are presumably vertical in their position on the bottom. The tubes 

 are easily torn open longitudinally, splitting along the major diameter of the oval. 

 Transversely and in other longitudinal directions they are rather tenacious. Inside they 

 are very smooth, probably lined with some secretion from the Amphipod . . . ". " Other 

 tubes are larger, about 25 mm. in greater diameter and 50 mm. in length. Sometimes, 

 but not always, they taper from bottom to top.. . . " "The tubes are closely aggregated 

 together and apparently cover the entire bottom where the dredging was made. They 

 clogged the bag completely and made examination of the catch extremely difficult." 



It may be added that the tubes are open at both ends, but can be accurately closed. 

 They are constructed of mud, with an admixture of sponge spicules, which are probably 

 accidental. 



Stebbing, 1906, p. 118. 

 Barnard, 1916, p. 142. 

 Stephensen, 1925, p. 156. 



Family HAUSTORIIDAE 



Genus Cardenio, Stebb. 

 Stebbing, 1906, p. 125. 



Originally founded on the $ only, the diagnosis of this genus can now be completed 

 thanks to the discovery of the <J, in which gnathopod 1 is strong and subchelate. 



