SHIPWORMS OF THE PHILIPPINE ISLANDS — BARTSCH 543 



The type (Cat. No. 312921, U.S.N. M.) was collected by the United 

 States Bureau of Fisheries Steamer Albatross Philippine Expedition, 

 from a piece of wood dredged at station 5252 off Linao Point, Gulf 

 of Davao, Mindanao, in 28 fathoms on coral bottom. It measures: 

 Height, 2.1 mm. ; length, 2 mm. ; diameter, 1 .8 mm. The pallet meas- 

 ures: Length, 3.9 mm., of which 1.2 mm. go to the stalk; diameter of 

 expanded blade, 0.6 mm. 



I take pleasure in naming this mollusk for Mr. Lewis Radcliffc. 

 Deputy Commissioner of Fisheries, who was a member of the scientific 

 staff during the cruise of the Albatross in Philippine waters. 



TEREDO (TEREDOTHYRA) TANONENSIS, new species 



TANON 8HIPWORM 



Plate 54, fig. 7; plate 56, fig. 1; plate 59, figs. 1, 2, 3 



Shell minute, milk-white, the anterior sinus of the anterior part 

 is bordered by a rather thick callus which is reflected over the margin. 

 From this margin strong denticulated ridges radiate fan-shaped over 

 the rest of the anterior part. These ridges are closely approximated 

 at the callus and become separated at their posterior end, on the 

 early portion of the shell, by a space about four times as wide as the 

 ridges. The last nine, however, are closely approximated at the distal 

 portion. This seems to be a senescent character. The anterior portion 

 of these ridges near the callus bear strong denticles, while the rest is 

 very finely denticulated, the grooves separating the denticles passing 

 down on both the dorsal and ventral margin of the ridges. The pos- 

 terior termination of the anterior part forms almost an even arc. The 

 anterior portion of the median part is crossed by strong dental ridges 

 which are a little wider than those on the anterior part and very 

 strongly denticulated. Of these ridges, 15 occur in a straight line 

 parallel with the ventral margin of the anterior part. The denticles 

 are somewhat spatulate in shape, the expanded portion being at the 

 posterior margin, while the stalk portion occupies the anterior half. 

 The median portion of the middle part is a slightly concave area 

 almost as wide as the anterior portion of the median pait. It is 

 crossed by the feeble continuation of the dental ridges which here, 

 however, are reduced to mere raised lines and without denticles. 

 The posterior portion of the median part is about as wide as the 

 anterior and middle portion combined, and is crossed by the contin- 

 uation of the ridges just referred to in the middle portion, but these 

 become decidedly enfeebled here. Posterior auricle narrow, almost 

 clawlike, separated from the posterior portion of the median part 

 by a strong constriction. The auricle is marked by rather strong, dis- 

 tantly spaced corrugations. Interior of shell bluish-white, the June- 



