456 Lt. -Colonel H. H. Godwin-Austen on 



phore was present in the spermatheca and is similar in 

 form of its spines to No. 3379 ; it is not quite perfect. 

 At the junction with capsule the flume has four spines on 

 one side, followed by fourteen on the other, Ayhich is not 

 the complete number — this portion and the flagellate end 

 being broken ofl". 



Kerkoj)horus ? natalensis, Kr. 



Shell very globose, not fully grown. Very microscopic 

 longitudinal striation. 



Locality. Equeefa (3387, No. 12, H.C.Burnup, B.M., spirit- 

 specimen no. 8). 



Mr. Burnup says of this species: "These, of course, 

 come very near to No. 13, but there being two specimens 

 exactly agreeing with each other in form and colour, and 

 slightly disagreeing in both these respects with No. 13. 

 J have kept them separate until you decide if they all three 

 belong to one species. It is only by such means that we 

 shall be able to learn the limitations of each species." 



No. 13 is dark grey on the foot, aiul is the same species 

 evidently as No. 12, the spotting on the visceral sac is of the 

 same character. 



The animal is dark-coloured on the foot, also on head and 

 neck, and the eye-tentacles internally. The overhanging 

 lobe at extremity of the foot long and Hnely pointed. The 

 right shell-lobe is very long and narrow, the left shell-lobe 

 also narrow and long, triangular on a broad base. Tiie left 

 dorsal lobe is in two separate parts. The viscera/ sac next 

 the mantle-edge plain, with a few scattered small white dots, 

 these are more numerous on the line of the rectum. Mingled 

 with them is a larger speckling of black, and a mottled dark 

 baud borders the kidneij ; the rest of the visceral sac is black- 

 brown, spotted very sparsely and minutely tvith white. In 

 another specimen the white spots wei'e absent. 



The radida (PI. XX. fig. 2 c) is arranged thus : — 



68 . 3 . 9 . 1 . 9 . 3 . 68, or 80 . 1 . 80. 



The marginals are nearly evenly bicuspid, becoming very 

 small ou the extreme margin. The jaw (PI. XX. fig. 2 c) 

 is arched high in the centre, and has a small central ])ro- 

 jection on a rather straight edge. 



I show the generative organs (PI. XX. fig. 2) with the 

 penis ndlcd to^^etlier, as in Part 11., pi. xiii. fig. 7 of 

 P. phcedinius, witli the end of the fhigellum encircling the 

 accessory gland — unrolled it is like that species. The 



