Stiulii's on niaiiiio Ostrauoils 09;") 



Distribution: — Atlantic Ocean between lat. 46" N. (G. H. FuWLUii) and lat. 36" S. 

 ((i. W. MtJLLER). Indian Ocean (G. \\ . Mfi.LKH). 



The female described above was consequently caught somewhat south of the previously 

 known distributional area. 



Conchoecia subarcuata C. Claus. 



Conchoecia subarcuata, C. Ci.Al s, 189U. p. 9. 

 striata, ,, „ 1890. p. 12. 

 ,, subarcuata, ,, ,, 1891 a, p. 58; pi. 111. figs. 3 — 9; ]j1. IX. 

 striata, ,, „ 1891 a, p. 62; pi. VIII, figs. 1—6. 



subarcuata, G. S. BRADY and A. M. Noh.max. 1896, p. 691 (= a reproduction 



of the original description). 



(;. \\. Ml'l.LEl!. 1906 a, p. I(i2: ]>l. XXI, figs. 10—16, 19. 



„ „ „ 1906 b, p. 7. 



„ „ „ 1908, p. 74. 



„ „ „ 1912, p. 83. 



Description: — See V. Cl.ATS. 1891a, p. 58 and G. W. MCl.LKl;. 1906 a, p. 102. 



Supplementary description: — Male: — 



Shell: — Length: According to G. W. MOlleh, 1,8 — 2 mm. The specimen investigated 

 by me measured 1,8 mm. The shape, as G. W. MI'ller pointed out, agrees closely with C. 

 lophura. The surface of the shell is bare. The selvage, the glands along the posterior margin 

 of the shell and the hinge are also similar to those of C. lophura. The compound glands are of 

 the type described by G. W. MUlleR; for other characters see this author's work. 



First antenna: — Tliis is of the same type as in C. lophura, but the arniatiue 

 of the e-bristle is different; cf. G. AV. Mi'l-LER; in tlie specimen investigated by me I coimted 

 nineteen or twenty spines in each row; a number of these were arranged in pairs and some alter- 

 nated more or less distinctly. The anterior side of this bristle was, as far as I could see, quite bare. 



Second antenna: — The protopodite and the exopodite are of 

 the same type as in C. lophura, but the first exopodite joint is almost bare. End o p o d i t e: 

 This is of the same type as in C. lophura. First joint: The a-bristle is bare or has some short 

 hairs at tlic middle; the b-bristle is also bare, and has only about three or four long hairs just 

 proximally of the middle. The e-bristle was not developed in the specimen investigated by me. 



Mandible (fig. 1): — Of the same type as in C. htjaloplujllum, but the first endo- 

 podite joint is furnished on its posterior side with three bristles, all of which have short hairs; 

 these three bristles correspond in position and size to the long lateral bristle and two of the medial 

 ones in my fig. 22 of C. symmetrica. 



The maxilla and the fifth and sixth limbs are similar to tho.se of C./o/j/n/m. 



V e n i s: — ( >f about the same type as in C lophura; its copulatory appendage is some- 

 what smaller; cf. the acconipa!iying fig. 2. 



