372 PROCEEDINGS OF THE ACADEMY OF [NoV., 



Seen only by Pease, whose full description of this species and 

 A. nigra may be found in Manual of Concho logy, vol. XVI. He 

 gave only ''Sandwich Islands" as locality. 

 Aglaja nuttalli Pils. 



Uniform black-brown above, pale with faint hghter maculation 

 below. A caudal filament. Length 40 mm. 



Sandwich Islands (Nuttall). Based on an old alcohoHc specimen. 

 Man. Conch. XVI, p. 50. 



Aglaja nigra (Pease) 



Black, two large white spots on anterior end, two on head disc, 

 and two on mantle lobes; sides white. Foot white, with throe large 

 black spots on each revolute side. Unknown to recent collectors. 



Aglaja pilsbryl hawaiensis n. subsp. Figure 10. 



Similar to A. pilshryi Eliot, « of the Samoan Islands, in having 

 figure 8 shaped black marks on both cephalic shield and mantle, but 



the figures are heavier than in that species. 

 The markings on the parapodia are reduced 

 to a few black spots along the lateral borders, 

 four on each side, one being beneath; and 

 there is an imperfect black rim on the front 

 edge of foot. The ground color is brownish 

 (perhaps stained by the alcohol, which has a 

 yellowish tint). No posterior filament. 

 Fig. 10.— Aglaja Length about 24 mm. 



pilshryi hawaiensis. jjilo, Hawaii (D. Thaanum). Type 47421 



A. N. S. P. 

 This is probably related to A. nigra (Pse.), and may possibly be 

 a less pigmented form or race of that, though I do not think so. 

 As Pease's species has not been figured, no close comparison can be 

 made. 



XV. Various Gastropods and Pelecypods. 



MURICID.E. 

 Vexilla thaanumi n. sp. 



Hilo, Hawaii. Types no. 127747 A. N. S. P., collected by D. 

 Thaanum. 



The shell is obovate, widest at the upper third, very solid. Sur- 

 face dull, regularly sculptured with very low, rounded, cantiguous 



^Doridium (Aglaia) pilsbryi, Eliot. Proc. A. N. S. Phila., 1899, p. 512, pi. 

 19, figs, la, 16. Reef at Apia, Samoan Is. The type specimen is No. 47422, 

 A. N. S. P. 



