292 MALDANDLE. 



Glymene amphistoma may be an Isocirrus, with notched cephalic rim and uniform anal 

 cirri. Tubifex marinus, 1 again, which he figures from 0. F. Midler (Do Blainville's, 

 Plate 35, fig. 2), resembles Nicomache. 



The group now under consideration formed the Clymeniens and Maldanies of Savigny, 

 and the Olymeniens of Milne Edwards and De Quatref ages. Cuvier placed them (Olymenea) 

 under the abranchiate setigerous division along with Nais. 



The brain in Glymene truncata is described by De Quatref ages 2 as small, bilobed, and 

 with two nerves in front. The oesophageal connectives are slender at first, but increase 

 posteriorly, and they give many small branches to the muscles. The visceral system is, 

 he thinks, represented by minute twigs from the anterior part of the connectives. The 

 ventral chain resembles that of the Cirratulids. Externally is a coat of parallel fibres. 

 The ganglia show neither connectives nor commissure, though they are numerous, each 

 foot having a pair touching in the median line, whilst a band of very small ganglia, 

 apparently isolated, occupy the rest* of the segment and give twigs to the muscles. 



Grube's Maldania (1851) had but a single genus, Glymene, with six species, but he 

 also included Ammochares (Owenia) under the same family. In his original description 

 of the genus Maldane* he noted the structure of the cephalic region and the absence of an 

 infundibulum posteriorly. 



In his 'Invertebrate Animals of Vineyard Sound' Verrill describes new species of 

 Nicomache, Bhodine, and Maldane, but the minute distinctions of these from the European 

 forms appear to require further investigation. 



Two species of Glymene are entered in Dr. Johnston's ' Catalogue of the Non- 

 Parasitical Worms ' (1865), viz. Glymene borealw, Dalyell, and Glymene lumbricalis, Audouin 

 and Edwards. As Dr. Johnston, however, correctly states, Sir John Dalyell described 

 the caudal funnel as the head and the cephalic plate as the tail, and thought that in all 

 probability it was the Sabella lumbricalis of Fabricius, a form entered in the Appendix to 

 the Catalogue, . and synonymous with. Nicomache lumbricalis (Nicomache maculata in 

 Britain) . 



The position assigned to this group by De Quatrefages (1865) was peculiar, the 

 family being placed after the Tomopteriens, which he also regarded as sedentary annelids. 

 In his table six genera are at once separated from the others by the fact that their bodies 

 are divided into three regions. These are further subdivided by the presence of an anal 

 funnel, by the presence of an anal plate, or by the absence of both. Under the first head 

 two genera are isolated as having no respiratory cseca, Glymene being further distinguished 

 by having a large cephalic plate, whilst Leiocejphale has none, or only a rudimentary one. 

 The third genus of this series, viz. Johnstonia, has respiratory cseca. Two genera have an 

 anal plate, viz. Maldane and Petal oproctus, the former being separated by the presence of 

 a cephalic plate, which is absent in the latter. His sixth genus, Ammochares, which has 

 neither plate nor funnel, belongs to another family. His next series of four genera is 

 characterised by the division of the body into two regions only, the first genus, Glymenide, 

 having a truncate head, the other three not showing this structure ; the snout, indeed, in 



1 ' Zool. Danica/ vol. iii, p. 497. 



2 Aimel. ii, p. 367. 



3 Arch. f. Naturges./ Bd. xxvi ; p. 92. 



