536 OLIGOCHAETA 



Dorsal pores absent {T). Gizzard, rudimentary, lying in V; in XLV, TV oesopliagus 

 dilated to form rudimentary calciferous glands ; intestine commences in XVIII. Nephridia 

 alternate in position. Dorsal vessel single ; last heart in XIII. Sperm-sacs in IX-XII. 

 Spermathecae with three diverticula, of which one is constantly in front of the septum, 

 behind which lies the pouch. Denial setae bifurcate at tip, with two delicate wing-like 

 processes, smooth. Hob. — New Zealand. 



This species contrasts strikingly with the remaining New Zealand species by its 

 strong pigmentation. 



(7) Acanthodrilus litoralis (Kinbeeq). 



Mandane litoralis, Kinbeeg, Ofv. Svensk. Akad., 1866, No. 4, p. 100. 

 ? Mandane patagonica ^ Kinbekg, loc. cit., p. 1 00. 



Definition. Length, 100 mm.; diameter, 6 mm.; number of segments, 120. Drostomium, 

 prolonged over half of buccal segment. Clitellum, XIII-XVII ; complete sacs for 

 a non-glandular area on last two segments. Setae in four double series, but individual 

 setae some way apart. Nephridiopores in front of third seta, commencing in segment VII 

 {at latest). Male pores corresponding in position to ventral setae. Sperm-duct pores on 

 XVIII, between setae i and 2. No dorsal pores. Spermathecal pores in front of third 

 seta. Gizzard present ; intestine begins in XVII. Sperm-sacs only one pair, in XI, to 

 which correspond a single pair only of sperm-duct funnels in X. Last hearts in XII. 

 Spermathecae two pairs in VIII, IX; diverticulum single, with a branched lumen. Denial 

 setae ornamented with variously sized spines. Hob. — Straits of Magellan; near 

 the shore. 



A. peculiarity of this species, according to Rosa (6), is the possession of certain 

 glands which he terms 'ghiandole filatrici.' They occur in the anterior segments, 

 on the anterior face of the septa, hut no apertures were discovered. They are 

 compared to the tufts of nephridia which occur in a similar situation in Trigaster 

 lankesteri, and to the ' Spinndriisen ' of the CapiteUidae ^. They may perhaps be also 

 compared to the specially dense mass of nephridia which occur in the Perichaetidae 

 in a few of the anterior segments. More likely, perhaps, they are ' peptonephridia,' 

 like those of A. annectens, &c. 



' The query is that of EosA. 



' H. Eisio, Die Capitelliden, Fauna u. Flora des Golfea v. Neapel, xvi, p. 324. T}ie resemblance in the 

 secretion (bundles of filaments) of the glands in the Accmthodrilus and in the CapiteUidae is very 

 remarkable. 



