66 Marine Investigations in South Africa. Vol. V. 



2. Tr. lucida, Stimpson. 



3f. capense. 



3. Tr. Gatalince, Cooper. 



M. Pacific. 



4. Tr. Yatesi, Angas. 



M. Pacific. 



5. Tr. longicornis, B. 



M. Indie. 



6. Tr. (?) gracilis, Pease. 



M. Pacific. 



7. Tr. (?) tristis, B. 



M. Indie. 



Triopa lucida, Stimpson. 



Stimpson, Descr. of some new Marine Invertebrata. Proc. of the 

 Ac. of Nat. Sc. of Philadelphia, vii., 1856, p. 388. 



PI. XII., figs. 6-7. 



One specimen was sent, procured near Tugela Eiver mouth, along 

 with Idaliella amcBrnda. 



The animal is now of a uniform whitish colour." The length is 

 9 mm., by a breadth of the body proper of 3-5 and a height of 3 ; 

 the length of the papillae of the back reaching up to 3 mm., that of 

 the leaves of the gill 2-5 ; the breadth of the foot 4 mm. 



The head with perpendicular mouth ; the tentacles truncate, 

 somewhat folded up. The frontal brim rather narrow with 

 8 appendages of different sizes, the highest somewhat nodular in 

 their upper half. The margin of the back otherwise not project- 

 ing, but rising through its whole length in club-shaped appendages, 

 on each side 15-17 (Stimpson mentions a number of about 40 in all). 

 The clubs (fig. 6) mostly of about the same size, slightly nodular (in 

 their upper half), the lower half stuffed with long strong spicules, 

 and in the point of the club a roundish bag.f The back smooth; 

 the gill consisting of 3 strong, quite separate leaves, of which the 

 lateral are bifid ; the anal papilla as usual. The sides of the body 

 rather high. The foot at least as broad as the body proper. 



The intestines shone dark-grayish through the foot. — The nervous 

 system as in the typical species. The short-stalked eyes of a 



* According to Stimpson the " colour is uniform trans^Darent white, except 

 that the tentacles, branchiae, and appendages are all of yellowish colour towards 

 their extremities. Length 0-8 inch. Simon's Bay, Cape." 



• t Of. Bergh, Polyceraden, I.e., ii., 1881, p. 642.— Bergh, Alaska (Dall), ii., 

 1880, p. 264, pi. xiii., pp. 16-17. 



