260 " THETIS " SCIENTIFIC RESULTS. 



width to within a short distance of the summit ;, the outer mar- 

 gin is straight throughout ; the inner distal border is oblique and, 

 slopes to the subacute apex ; both margins are minutely ciliate. 

 Apex of the outer ramus of the fifth pair tumid ; there is a 

 pyriform lobe in the middle of the inferior surface just above the 

 suture ; the latter is thickened on the inner ang-le, and there is a 

 small tubercle at some distance below; the inner aspect of the 

 distal margin and the tubercles are clothed with rasp-like denticles. 

 Outer ramus of uropods very small ; when closed its internal 

 border is opposed to that of the inner branch. 



Length of adult male ... ... ... ... 11 mm. 



Width of frontal margin ... ... ... 3 ,, 



Greatest breadth of first peraeon segment ... 5 ,, 

 „ ,, ,, body at the sixth segment 6 ,, 



Eight examples were obtained off Cape Hawke, and ten off 

 Coogee Bay, in 25 to 50 fathoms. 



C7M0D0CE OONVEXA, Miers. 



Cymodoce convexa, Miers, Cat. Crustacea, Col. Mus. & Geol. 

 Surv. N. Zealand, 1876, p. 114, pi. iii., fig. 6. 



(Fig. 29.) 

 Stations 21, 50, 55. 



This species is represented by about seventy specimens. The 

 tubercles on the terminal segment vary greatly ; in some examples 

 they are scarcely visible, in others often prominent, ridge-like and 

 frequently three instead of two are present on each side of the 

 median line. 



Mandibles moderate, about three times as long as broad ; apical 

 denticle with a slight rounded lobe inferiorly ; secondary tooth 

 subtrilobate at the summit ; the stouter accompanying setae have 

 several seriate spinules on the upper surface. Molar tubercle 

 fairly well defined ; a small broadly conical process is present 

 between it and the dental setae. Palp rather short, with com- 

 pressed joints, of which the first is broader but of equal length 

 to the second. 



The first maxillae have the inner lobe stout and tipped with four 

 strong pectinated spines ; the outer lobe bears about twelve simple 

 curved spines , another larger set is plainly visible within the 

 lobe about the middle, ready for use at the next moult. 



The maxillipedes have the upper portion of second joint a little 

 longer and broader than the lower ; tlie former has the usual 



