DESCRIPTIONS OF GENERA AND SPECIES 663 



single ; five hearts in X-XIII. Two pairs of sperm-saas in XI, XIL Penial setae with 

 num,erous transverse rings of minute points. Spermathecae without recognizable diverticula. 

 Hah. — Liberia. 



This species undoubtedly comes very near to B. rosea; indeed, I am almost 

 inclined to believe that a careful comparison , would show them to be the same 

 species. The only difference appears to be the ornamentation of the penial setae in 

 the present worm, and the absence of any ornamentation in B. rosea; the first 

 dorsal pore, however, is further forward in B. rosea; and for the present I keep 

 the two forms apart though without any strong conviction that this course is the 

 right one. It also comes near to B. buttikoferi. It has formed the subject of two 

 contributions by Hobst (1, 2). 



(a) Benhamia buttikoferi (Hobst). 

 Acanthodrilus Biittikoferi, Hobst, Notes Leyd. Mus., ix, 1887, p. 391. 



Definition. Length, 330 mm. Clitellum, XIII (XIF)-XIX, with median ventral area, 

 uninvaded by the modified epidermis, upon XVI-XIX. Setae paired; the two pairs of 

 one side closer together anteriorly than in the posterior segments, as is also the case 

 with B. beddardi. Trostomium continued by grooves on to buccal segment. Dorsal 

 pores visible behind the clitellum. Two gizzards present lying in V and VII ; three 

 pairs of calciferous glands in XIF. XV, XVI. Septa separating segments VI/XII 

 specially thickened. Mucous glands apparently present. Dorsal vessel single ; four pairs 

 of hearts in X—XIII. A single pair of sperm-sacs in XII. Penial setae swollen at 

 free extremity, and ornamented with a series of spinelets, the apices of which are 

 directed forwards. Spermathecae without apparent diverticula. Hab. — Liberia. 



In addition to the above reference, see Hobst (4). 



(3) Benhamia beddardi (Hobst). 

 Acanthodrilus Beddardi, Hobst, Notes Leyd. Mus., x, 1888, p 133. 



Definition. Length, \6o mm. Clitellum, {XIII) XIV-XIX {XX), saddle-shaped. Prostomium 

 rather long. Setae strictly paired. Two gizzards and three pairs of calciferous glands 

 in XIV, XV, XVI{I). Mucous glands present. Dorsal vessel single, four pairs of 

 hearts. Penial setae ornamented at extremity with numerous spinelets, the apices of 

 which are directed towards the free end of the setae. Spermathecae with several minute 

 diverticula 'only obvious in transverse sections' In the neighbourhood of the spermathecae 

 are two hindles of copulatory setae accompanied by glands. Hob. — Liberia. 



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