462 



GONIADA MACULATA. 



Genus LXXIV.— Gonjada, Audouin and M. Edwards. 



Head slender, elongated and conical, with four terminal tentacles. Body rounded 

 anteriorly, flattened posteriorly ; segments with two rings. Proboscis minutely papillose, 

 with a row of V-shaped denticles on each side toward its base, and at its end two larger 

 pectinate jaws and an adjacent series of smaller denticles. Feet single in front, double 

 behind, the former having compound bristles, the latter both simple (dorsal) and compound. 

 The nerve-cords (Fig. 87) lie below the insertion of the oblique muscles, which pass from 

 below the bristle-bundles on each side with a slight inclination downward and inward, 

 and meet for insertion on each side of the hypodermic wedge above the nerves, which 

 lie in a somewhat triangular or pyriform area of the hypoderm, and each has a 

 small neural canal toward the upper and narrow part in section. Segmental organs 

 open ventrally, whilst internally they end in a tuft of short blind branches provided 

 with solenocytes. Genital funnel is trumpet-like and ciliated, fuses with and then opens 

 at maturity into segmental canal, and thus conveys genital products to the exterior 

 (Goodrich). 



1. Goniada maculata, (Ersted, 1843. Plate LVI, figs. 2 and 3 ; Plate LX1V, figs. 6-6 d 

 —head, teeth; Plate LXXV, figs. 12-12 a— feet; Plate LXXXV, figs. 1-1 a'— 

 bristles. 



Specific Characters. — Head an elongated tapering conical process, with four short 

 tentacles at the tip, and consisting of eight segments. Body 4— 6 ins. in length, tapered 

 anteriorly and posteriorly, rounded in front, flattened posteriorly, and terminating in two 



Fig. 87. — Transverse section of the anterior third of Goniada maculata. Enlarged. 



slender cirri. Proboscis has towards the base a row of about ten dark brown V-shaped 

 denticles on each side. They diminish in size distally, and also to some extent proximally, 

 in extrusion. Distally the organ has a circle of about twenty bluntly conical papillas, and 

 within this are two lateral denticles with a rounded base and a toothed distal region. A 

 series of ^-shaped intermediate small denticles, varying in size, forms a belt between the 

 larger pair. Feet simple in front, with three long papillas or lobes, but with two divisions at 

 the twentieth foot, the dorsal having a spine, a lanceolate lobe with a process at the base 



