140 ON SOME NEW SPECIES OF NUDIBRANCHIATE MOLLUSCA. 



Pigs. 6-8. Doris crescentica, Coll., n. sp. : 6, general view of animal, its dorsum (nat. size) ; 7, a dorsal 



tentacle and its sheath, anterior view ; 8, a branchial tuft (or branch). Sketch taken from 



specimen obtained at the island of Barundum, west coast of Borneo. 

 Figs. 9-14. Chromodoris iris, Coll., n. sp. : 9, lateral view of animal in progression, the branchiae partly 



closed ; 10, another view of the same, with the branchiae fully expanded ; 11, a side view of the 



animal contracted and at rest ; 12, a lamina of the branchiae ; 13, a dorsal tentacle ; 14, the 



spawn. 

 Figs. 15-17. Chromodoris Bullockii, Coll., n. sp. : 15, the animal in progression; 16, the underside of 



the head; 17, plan in outline of the brancbial laminae. 

 Figs. 18-22. Chromodoris aureo-purpurea, Coll., n. sp. : 18, dorsal surface of the animal in progression; 



19, outline from above of the animal at rest ; 20, diagram of the mode of arrangement of the 



branchiae ; 21, a branchial lamina; 22, a dorsal tentacle. 

 Figs. 23-26. Chromodoris tumuli/era, Coll., n. sp. : 23, dorsal surface of the animal in progression; 24, 



a tubercle of the dorsum seen in profile; 25, a branchial lamina; 26, a dorsal tentacle. 

 Figs. 27-29. Chromodoris tenuis, Coll., n. sp. ; 27, upper surface of the animal in progression; 28, the 



under surface of the animal as seen swimming with foot ; 29, anterior view of a dorsal tentacle. 

 Figs. 30-33. Chromodoris funerea, Coll., n. sp. : 30, animal in progression as seen from above; 31, a 



dorsal tentacle; 32, a branchial tuft ; 33, an outline plan of the branchiae. 

 Figs. 34-37. Chromodoris Alderi, Coll., n. sp. : 31, dorsal surface of the animal in progression ; 35, larnime 



of the branchiae ; 36, a dorsal tentacle ; 37, the suctorial mouth. 



Plate X. 



Figs. 1-5. Albania formosa, Coll., nov. gen. et sp. : 1, animal in movement as seen swimming, its upper 



surface ; 2, the veil ; 3, a tuft of the branehue ; 4, a dorsal tentacle ; 5, an outline of the 



under surface. 

 Figs. 6-11. Triopa Principis-JVallue , Coll., n. sp. : 6, animal in progression, upper surface, the branchiae 



expanded ; 7, side view of the animal at rest ; 8, a papilla of the dorsum ; 9, a papilla of the 



head ; 10, a dorsal tentacle ; 11, outline of a branchial twig. 

 Figs. 12-14. Trevelyana felis , Coll., n. sp., immature : 12, animal in progression ; 13, animal as contracted 



at rest; 14, natural size. 

 Figs. 15-17. Doridopsis arborescens, Coll., n. sp. : 15, the animal in progression ; 16, outline of the under 



surface of the body ; 17, a branchial tuft. 

 Fig. 18. Doridopsis rubra, Kel. : diagram of the branchiae. 

 Figs. 19-23. Phyllidia spectabilis, Coll., n. sp. : 19, upper surface of the animal ; 20, outline of the under 



surface of the same; 21, a dorsal tentacle and sheath; 2.2, diagram portion of branchiie ; 23, 



the spawn. 

 Figs. 24-28. Freyeria variabilis, Coll., n. sp. : 24, animal, its upper surface; 25, diagram of the under 



and lateral surfaces, showing position of branchiae ; 26, an under view of the head ; 27, a dorsal 



tentacle ; 28, sketch portion of the branchiae. 

 Figs. 29-33. Scylhea pelayica, Linn. : 29, dorsal surface of the animal; 30, position which the animal 



assumes in falling through the water; 31, a dorsal tentacle sheath; 32, branchial tuft covering 



the inner surface of the body ; 33, the foot from below. 

 Figs. 34-38. Bornella marmorata, Coll., n. sp. : 34, outline sketch of the head; 35, a dorsal teutacle; 



36, the veil ; 37, a branchial lobe ; 38, markings on the mantle. 



