112 W. BLAXLAND BENHAM. 



EXPLANATION OF PLATE 12, 



Illustrating W. Blaxland Benham's paper, "On Benhamia 

 coecifera, n. sp., from the Gold Coast. 



Fig. 1. — Ventral viewof genital segments of Benliamia ccecifera. (Nat. 

 size.) The segments are numbered. All the genital pores are shown, spth. 

 Spermathecal pores, p^. p^. Copulatory pits in their neighbourhood, cop. 

 Copulatory (?) organs of a different nature on xiv. m. Latero-ventral margin 

 of clitellum bounding the " ventral field." The arrangement of the copulatory 

 pits, represented as small dots, is shown. 



Fig. 2. — Three copulatory pits from the " ventral field." In B. and C. a 

 papilla {p.) is more or less exposed in the pit ; in A. no papilla is to be seen. 



Fig. 3.— A portion of the intestine exhibiting the characteristic finger- 

 shaped caeca (c), arching upwards over the dorsal blood-vessel (Z). v.) ; in 

 two cases the blood-vessels (».) to this caeca are shown. 



Fig. 4. — The three pairs of calciferous glands {gl.), with their vessels from 

 the dorsal trunk {d. v.). 



Fig. 5. — The prostate duct {d.), with copulatory muscles (»/.), which are seen 

 passing into the next segment, pr. A portion of prostate, n. c. Ventral 

 nerve-cord. spt. Septum. 



Fig. 6. — The two spermathecae of the right side. d. Muscular duct. div. 

 Diverticulum. 



Fig. 7. — The three most anterior pairs of hearts, lying in Segments vii. 

 Tin, and IX. The dorsal vessel {D. v.) is seen !o terminate in Segment vii. 

 spt. Septum 9/10. 



Fig. 8. — The same three hearts seen partially from the side, showing tlie 

 relations ventrally. I. I. v. Latero-longitudinal vessel arising in Segment ix. 

 g. Its branch to gizzard. ^. Branch from first heart to the gizzard, s. 

 Swelling from which this arises. V. v. Ventral vessel. 



Fig. 9. — A small portion of the body-wall of a segment, to show the dilata- 

 tions on the circular vessel (c), as well as the position of the niicronephridia 

 («.). iS'., S^. The anterior and posterior septa. 



