44 MacFarland — Preliminary Account of Dorididse. 



rather large, erect, diverging, perfoliate with 10 to 12 leaves, clavus long, 

 sheath margins thin and slightly tuberculate ; branchial plumes small, 10 

 or 11, usually simply pinnate, occasionally bipinnate in part, completely 

 retractile within a sheath with thin edges. 



Length of large specimens, 20 mm. ; width, S to 10 mm. ; height, 4 mm. 



Labial armature a broad light-yellow band, quadrangular below, trian- 

 gular at the sides and interrupted above, its elements closely set hooks 

 bifid at the distal end ; radula small, broad with a very shallow median 

 groove. Teeth in 77 rows; dental formula 23-1-23; rhachidian tooth mas- 

 sive, the hook divided into 4 to 6 long nearly equal denticles ; pleurje 23 in 

 number, the first with a stout hook bearing 2 or 3 denticles on its inner 

 margin and 4 to 7 smaller ones on the outer; the successive lateral teeth 

 increasing somewhat in height and in number of denticles upon outer 

 margin up to 12 to 15, the inner margin having none ; toward the middle 

 of the row the denticles become longer and more prominent, the whole 

 tooth becoming sawlike in form ; the outer 3 or 4 decrease somewhat in size 

 but not so much as in the preceding species. Glans penis short, bluntly 

 conical, and armed with minute recurved hooks; vas deferens very long 

 of 2 portions, a proximal glandular and a distal muscular part indistinctly 

 set off from each other. 



Not rare. Found in the same localities as the preceding species. Very 

 sluggish in movement in the aquarium. But one other species of this 

 genus, CadliiKi pacAfica Bergh, has been described from the Pacific (Alaska). 

 It is clearly distinct from the Alonterey forms as shown by the dentition, 

 C. pnclficji having 67 to So rows of teeth with a formula of 33-1-33, the 

 rhachidian tooth having 3 or 4 denticles on eaclt side of a median hook and 

 the denticles of the outer pleurae ranging up to 18 to 22, the first pleura 

 having 3 upon the inner margin and 6 or 7 on the outer. 



9. Chromodoris porterae Cockerell. 



Chromodoris porterie Cockerell. Three New Species of Chromodoris, The 

 Nautilus XVI, 1902, 20. 



One specimen of Chromodoris was taken at Pacific Grove in 1894. Colored 

 drawings were made of it but it escaped down the overflow pipe of the 

 aquarium and was lost before further study could be made. The same 

 species has been taken at La Jolla, California, and its color characteristics 

 given under the above name by Prof. T. D. A. Cockerell (1902). 



Body elongate, linear, depressed, mantle aliout equally rounded in front 

 and behind, mantle margin rather narrow laterally and behind, in front 

 broad; tail not covered by the mantle save in its anterior portion. General 

 body-color deep ultramarine blue ; mantle with 2 broad longitudinal stripes 

 of orange, entirely or incompletely united behind the branchial plume, 

 ending in front just outside the bases of the rhinophores ; in front of rhino- 

 phores a transverse arc of orange as if a continuation of the lateral stripe ; 

 a median light blue line extending from between the rhinophores to the 



