84 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



Subbranchial, subhepatic and pterygostomian regions pubescent, 

 sculptured. Epistome broad and very shallow, distant from, and 

 above, the anterior margin of the merognath; the intervening space 

 is filled by the palpus. MaxilUpeds very large, bulging, the merus 

 broader than long and about three times as large as the ischium, 

 intermediate sulcus sUghtly obhque; merus with an antero-internal 

 angle, and a sulcus along the anterior and the external margins. 



The cheUpeds of the female are of moderate size, equal, finely 

 granulate; a broadly oval tympanum extends half the length of the 

 merus; the carpus is not much longer than wide, inner angle rounded; 

 the manus increases in width distally, its height is nearly as great a^ 

 its horizontal length across the middle, lower edge with a sharp 

 granulated fine which is continued half way along the finger, upper 

 surface rounded; fingers long, slender, deflexed, curved inward, a 

 granulated ridge on the outer surface of each and on the upper edge 

 of the dactylus, but the distal third of the fingers is smooth; tips very 

 slender, horny, overlapping; there is a narrow gape and a shallow 

 prominence near the base of the dactylus. 



Legs granulate; merus joints dilated, the tympana strongly marked, 

 smooth, occupying the entire width and about three-fourths the 

 length of the segments; dactyU much longer than carpal joints, 

 grooved, carinse sparingly fringed with hair. 



Sternum and abdomen smooth and shinmg; abdomen subcircular. 



This species is very distinct from any before described. It is thick 

 like D. myctiroides (ililne Edwards) ^ and D. wichmanni de Man,^ but 

 the carapace is much shorter and broader and almost devoid of orna- 

 mentation. The merognath is wider than in any other species of 

 Dotilla, the ischium-merus having much the form of that in Scopi- 

 mera investigatoris Alcock,^ but the division sulcus is situated much 

 further back. D. profuga Nobih * is the only species which approaches 

 ours in the reduction of the epistome. The tympana are larger and 

 more conspicuous than in any other species. 



TYMPANOMERUS PHTLIPPINENSIS, new species. 



Type-locality.— Guijulugun, Negros; shore; April 2, 1908; 1 male. 



Type.— Cat. No. 45597, U.S.N.M. 



Dimensions.— Type male, length 3.2 mm., width 5.2 mm. 



Carapace subpentagonal, the upper margins of the orbit being 

 obhque and the lateral margins of the carapace converging posteri- 

 orly; carapace convex from front to back, uneven, granulate; front 

 almost wholly visible in dorsal view, more than one-fourth as wide, 

 in its posterior or widest part, as the distance between the outer 



1 Ann. Sci. Nat., Zool. (3), vol. IS, 1852, p. 152, pi. 4, fig. 24. 



« Weber, Zool. Ergeb. einer Reise in Niederl. Ost-Indien, vol. 2, 1892, p. 308, pi. 18, fig. 8. 



s Illus. Zool. Investigator, Crast., pt . 10, 1902, pi. 63, fig. 4b. 



< Boll. Mus. Zool. Anat. comp. R. Univ. Torino, vol. 18, 1903, No. 447, p. 22. 



