DORIDIDtE. 



D. coccinea. Lateral spines numerous, about 60 on each side ; those near the centre very short, broad, 

 bicuspid, hooked ; increasing suddenly into very long, slender, bifid, arched spines towards the 

 sides. No central spine. About 65 rows ; pale yellowish. 60-0-60. Fig. 6. a, an outside 

 spine much enlarged ; b, an inside spine much enlarged. 



D. repanda. Lateral spines about 22 on each side, more or less curved ; those next the centre 

 stout, denticulated on each side ; the outside ones longer and more slender, also strongly 

 denticulated on the margin. A triangular central spine, the apex obtuse and curved, with 

 4 denticles. 68 rows. 22-1-22. Fig. 7 ; and Fam. 1, PI. 1, figs. 10, 11. 

 ** Tongue narrow. 



D. aspera. Lateral spines 3 on each side ; the inner one large and broad, having the anterior margin 

 convex, the apex curved, with a ridge and a denticle on each side ; outer spines rudimentary. 

 A thin central plate, thickened at the margins, oblong-quadrate. 30 rows; transparent 

 yellow. 3-1-3. 



D. proximo,. Lateral spines 1 and 10 small plates on each side ; the spine large, falcate, with the 

 angle thickened and ridged; plates sub quadrilateral, slightly notched behind. No central 

 plate. 41 rows, il'1-11. Fig. 8. 



D. muricata. Lateral spines 3 on each side ; 2 rudimentary, and 1 large and broad, like that of 

 D. diaphana, but rather broader at the base. Central plate narrower than in D. diaphana. 

 30 rows ; pale brownish yellow. 3-1-3. 



D. diaphana. Lateral spines 3 on each side ; the 2 outer ones small and rudimentary ; the inner large, 

 thickened and convex on the inner margin, the apex curved, with a subdenticulated ridge, 

 and an obtuse denticle on each side. Central plate oblong-quadrate. 30 rows ; yellowish. 

 3-1-3. Fig. 9. 



D. oblonga. Lateral spines 2 on each side ; the inner one large, triangular, slender and a good deal 

 curved above, broad at the base, the inner margin thickened and divided by constrictions 

 into 3 portions, the upper one riclged or faintly denticulated at the sides ; the outer spine 

 smallish and obtusely hooked. No central plate. Tongue rather short. Pale yellowish. 

 (The number of rows of spines not made out.) 2-0-2. Fig. 10. 



D. bilamellata. Lateral spines 2 on each side; the inner one very large, triangular, tapering, smooth, 

 slightly curved and rather slender above, broad at the base ; outer spine small, obtuse. In 

 the place of the central plate is an erect, ear-shaped, membranous fold. 28 rows. 2-0-2. 

 Fig. 11. 



D. dep?'essa. Lateral spines 2 on each side ; the inner one large, transversely elongated, subquadrate, 

 with a fold on the inner margin and a small hook at the exterior and upper angle, the sides 

 ridged and bearing an obtuse denticle ; the outer spine small, broad. No central plate. 

 33 rows ; almost colourless. Tongue comparatively small. 2-0'2. Fig. 12. 



D. inconspicua. Lateral spines 2 on each side ; the inner one transversely elongated, quadrate, with a 

 fold on the inner margin, rather narrower than the last; the apex more produced, stout, 

 hooked, with the sides minutely denticulated, and bearing a large obtuse process ; outer 

 spine inconspicuous. No central plate. 37 rows ; yellowish, almost colourless. Tongue 

 minute. 2-0-2 Fig. 13. 



D. pusilla. Lateral spines 2 on each side ; the inner one large, ovate-triangular, rather strongly 

 hooked, with a denticulated ridge on each side, terminating in a strong tubercle ; outer spine 

 small. No central plate. About 30 rows. 20-2. 



D. sparsa. Lateral spines 2 on each side ; the inner one large, ovate-quadrate, like that of D. incon- 

 spicua, but shorter and less transversely elongated. No central plate. About 30 rows ; 

 almost colourless. 2 - 0-2. 



