2'2 ' ENDEAVOUR " SCIENTIFIC RESULTS. 



LEPTOMITHRAX STERNOCOSTULATUS, Milne Edwards. 



Paramithrax gaimardii, Miers, Cat. Crust. New Zealand, 1876, 

 p. 6 (not P. fjai'inardii, Milne Edwards, 1834). 



Paramithrax sternocottulatux, Milne Edwards, Ann. Sci. Nat. 

 (3), xvi., 1851, p. 291 [71], pi. x., figs. 3, 3a, 3m, 4. 

 Miers, Ann. Mag. Nat. Hist. (5), iv., 1879, p. 9. Grant 

 and McCulloch, Proc. Linn. Soc. N.8. Wales, xxxi. r 

 1906, p. 28, pi. iii., figs 2 and 2a. 



Four miles west of Kingston, South Australia, 30 fathoms ;. 

 one ovigerous female. 



Cape Marsdert, Kangaroo Island, South Australia, II 

 fathoms ; one female. 



North of Cape Borda, Kangaroo Island, 40 fathoms ; one 

 male, three females, all small. 



South Australia ; one female. A large specimen 41.3 by 

 30.8 mm., including spines, decorated with numbers of a flabel- 

 late bryozoan and one elongated sponge. The preorbital and 

 postorbital lobes overlap in this specimen. 



The male of this species is easily recognised by the peculiar 

 cavities in the sternum, which are more numerous on the 

 anterior part than in L. tuberculatus, but both sexes are dis- 

 tinguished by the postorbital lobe in the form of a flat, trun- 

 cate spine with bidentate extremity, two spines arranged 

 transversely on the posterior margin, two shorter ones on the 

 cardiac region, and three long, submarginal spines on the 

 branchial region. 



LEPTOMITHRAX TUBERCULATUS (Whitelegge). 



Paramithrax tubercular HJ, Whitelegge. Mem. Austral. Mus., 

 iv., 1900, p. 146, pi. xxxiv., figs. 1 and 2. 



Only two specimens were taken by the "Endeavour." 



Twenty-five miles south by east of Double Island Point. 

 Queensland, 33 fathoms ; one male. Carapace overgrown 

 with sponge. 



Shoalhaven Bight, New South Wales, 15-45 fathoms ; one 

 male, partly overgrown with compound ascidian. 



The only previous record is New South Wales, from Broken 

 Head to Wata Mooli. 20-78 fathoms (Whitelegge). 



