152 



TEltliA NOVA" EXPEDITION. 



Station 294, Ross Sen, 74' : 25' 8., 17!) : 3'E., 158 fathoms (289 m.), Agassi/ trawl. 

 bo tfimi fauna. -Ian. 15th, I '.) 1 :!. Three?. 



Station 338, .M.-.Mur.ln Sound, 77 13' S., lf>4 18' E., 207 fathoms (379 m.), 

 Agassi/ trawl, bottom fauna (mud). Jan. 23rd, 1912. Four /, six + , and four young. 



Station 349. off Butter Point. Western Shore of Mc]Murdo Sound. 80 fathoms 

 (14fim.), Agassiz trawl, bottom fauna (large eatch of glassy sponges), Feb. 15th, 

 11)12. One $. 



Joubin ('14) has pointed out that the only important difference between this 

 species and M'. tnnjui'ti (Joubin) is that in .17. i-lmn-nti the back and upper surface of 

 the dorsal arms are covered with fine cutaneous tubercles, while in JA iurqwti these 

 parts of the body are .smooth. The above collection of five males, ten females, and 



Vs. 



FK;. 12. Miiacliites rlmrcoti, male reproductive organs, skiu of Noedliam'.s pouch 

 stripped off to show sperms, natural size. up}*, pr., Appendix to prostate ; G., 

 genital gland ; N., Needham's pouch ; p., prostate ; pelt., pouch-like dilatation ; 

 pen., penis; sp., spernmtophores ; V.D., vas deferens ; Y.E., vas efferens ; 

 V.S., vesicula seminalis. 



five young specimens have a mantle-length varying from 40 to 7 mm. The funnel- 

 organ consists of two V-shaped pads, which, although placed closely together, are 

 distinct! v separate, so as not to form the W -shaped organ seen in ^f. rirromi (Link.), 

 and in .)/. nn>xfli<it<i (Link.). 



Three males from Station 338 (Jan. 23rd) were partially dissected, and arc 

 distinguished by the letters A, B, and C. The mantle-lengths of each are A, 40 mm.. 

 IS, 32 mm., and 0, 25 mm. The male reproductive organs (Fig. 12) all show a very 

 large pouch to the penis, and possess a large prostate and small accessory gland, and 

 the vas effcrcns is very short and thick. Specimens A and B possess a genital gland 

 measuring about 25 by 17 mm., and show no trace of sperms in any part of the genital 



