162 



"TERRA NOVA" EXPEDITION. 



FAMILY SKI'K >U 1 >AE. 

 ]1. Semirossia tenera (Verrill). Fig. 34-39. 



iix ii-it,-rn, Verrill, Am. Journ. Sc., XX, p. 392, 1880; Proc. U.S. Nat. Mus. III., 

 ]>. 360, 1880 ; Bull. Mus. Comp. Zool., III., p. 103, pi. 3, tigs. 5-5/, : pi. 7, tigs. -2-2,1, 

 -.'-Mi, 1881 ; Trans. Connect. Acad., V, p. 357, pi. 46, tigs. -2-2d, 3-Sb ; pi. 47, tigs. 5-.Vi, 

 1881: Rep. U.S. Fish. Comiu. for 1879, pp. 3S5-3S7 (175-177), pi. 33, pi. 34, fig. 1, 

 1882. 



I?o.sW,/ i>l,j<,,<;<-, E. A. Smith, "Alert" Exp., p. 22, pi. 3, fig. 3. 1881 ; Hoyle, Rep. 

 "Challenger" Exp. (Cephalopoda), XVI, pp. 119-120, pi. 15, figs. 10-18, 1886. 



Sniiii-i'ssiii triii-i-ii, Steenstrup, Overs. Danske Vid. Selsk. Forh. 7, p. 89, 1887 ; LiinnluTg, 

 SvensL Akad. Handl. XVII, Afd. IV, p. 18, 1891 ; Pfeffer, Nordisches Plankton, IV, 

 pp. 14-46, text-figs. 44-47, 1908. 



Station 42, off Rio de Janeiro, 22 50' S., 41 34' W., 40 fathoms (73 m.), Agassiz 

 trawl, bottom fauna (sand), 3Iay 2nd. 1913. Six $, five ?. 



The above have a dorsal mantle-length of 18-27 nun. The funnel-organ consists 

 of a short A-shaped median pad and two long, narrow lateral pads. The long, narrow 

 valve of the siphon, consisting of two naps folded towards one another (Fig. 38), 



Fie. 34. Si'inirosxiii tnti'i-fi, male reproductive organs, X 3. 

 ace.fjl., Accessory gland ; N., Needham's pouch ; p., 

 prostate ; pen., penis ; sp., spermatophores ; V.D., vas 

 deferens : V.E., vas efferens ; V.S., vesicula seminalis. 



Fie. 35. Samii'ims!,! ti'iiera, ovary, partly dia- 

 gramuiatic, to show ink-sac, X 2. </., Anus : 

 n.upp., anal appendages ; /.., ink-sac ; .;//., 

 nidamental glands ; ml., oviduct : c., ova. 



becomes wider posteriorly, where it measures about the breadth and one-third of the 

 length of one of the lateral pads of the funnel-organ. ( >n opening the ventral mantle 

 of a male, the anal aperture, with very long appendages, is observed situated at a short 

 distance below the median pad of the funnel. About half-way between the anal 

 aperture and the end of the body the renal papillae are conspicuous at a little distance 

 on cither side of the anus. The penis, which is short and broad and without a pouch, 

 projects to a short wav below the anal aperture. The spermatophore-sac is much 



