102 Marine Investigations in South Africa. Vol. V. 



3. Pl, euchroa, B. n. sp. 

 PI. VII., figs. 1-5; PI. VIII., fig. 25. 



Two specimens of the form were procured, both by shrimp-trawl ; 

 one taken from a depth of 50 fms. (green mud) off Cape Hang KHp ; 

 the other from sandy bottom at a depth of 30 fms. in Buffalo Bay. 

 A third individual was di-edged off Cape Point Lighthouse, and two 

 at Seal Island from a depth of 16 fms. and a sandy bottom with 

 shells. 



The first two were about of the same size and appearance. Their 

 length was 17 mm. by a breadth of 9-10 and a height of 6-7 ; the 

 breadth of the frontal veil 5, of the brim of the back 4 mm., the 

 length of the gill 2 by a breadth of 175 mm., the breadth of the foot 

 7 mm., of the caudal furrow 3-4 mm. The two last-mentioned 

 individuals were 3 cm. long (not dissected). — The ground colour of 

 the back dark gray or blackish with whitish lines, the colour other- 

 wise whitish or yellowish. 



Of the usual form, behind the frontal veil perhaps a small 

 caruncle ; the margin of the back with a series of fine sometimes 

 grayish cnidocysts, their contents sometimes projecting. The lateral 

 lamellae obliquely set, in number about 40. 



The hnlhus ijharyngeus in 4 individuals whitish, 3-3*5-4 mm. 

 long by a breadth of 3-3-5 and a height of 3. The mandibles thin, 

 yellowish, about as in PI. Gilchristi, the height of the columns of 

 the masticatory edge about 0"04 mm., of w^hich the blunt end pro- 

 jected O'Ol mm. high. The nearly colourless or dirty yellowish 

 rasp of the tongrte contained 18 rows of plates, in the sheath 27, 

 the total number of series being thus 45 ; in the series on each side 

 about 25 plates. The plates yellowish ; the breadth of the median 

 0"14 mm. ; the height of the tvi,^o outermost lateral 0*06-0'08 mm., 

 rising to 0*20. The median plate (fig. 25) had on each side 5 strong 

 denticles and a small one on the short pointed hook ; the first lateral 

 plate with a series of fine denticles (fig, 1), all the other (figs. 2, 3) 

 without denticles (as in the PI. natalensis). 



The cnidge as usual. The anterior genital mass dirty yellowish, 

 of meniscus form. In three individuals the pointed penis (fig. 5) 

 projected 5'5 mm. from the genital papilla or everted vestibulum 

 (fig. 4). 



To the same species very probably belong a large individual 

 procured by large shrimp-trawl about 20 miles W. of Bast London 

 from a depth of 37 fms. 



It had a length of 4-5 cm. by a breadth of 1-8 and a height of 1 ; 



