578 L. A. BORRADAILE. 



Genus Cryptodromiopsis Borradaile, 1903. 



For a diagnosis of this genus see the paper cited on p. 576 above. 



7. Cryptodromiopsis tridens n. sp. (PI. XXXIII, fig. 4). 



Diagnosis: "A Cryptodromiopsis with the body broader than long, smooth and hairy, 

 the grooves between the regions almost wholly lost, a smooth, naked, oval boss on each 

 side of the cardiac region ; the three teeth of the front of almost equal length and all 

 sharp; teeth at the upper and lower inner, and at the outer orbital angles; two anterolateral 

 teeth but no tooth at the branchial groove ; a subhepatic tooth and a prominent angle of 

 the mouth ; the fingers of the chelipeds gaping and two blunt teeth on the wrist ; a thorn 

 at the end of the carpopodite in the first two pairs of walking-legs, and another at the 

 end of the propodite in the last two pairs, making with the end-joint a strong chela." 



Length : 6 mm. Breadth : 8 mm. Colour in spirit : dull yellow. 



There is no epipodite on the cheliped, and the sternal grooves of the female end side 

 by side on the cheliped segment mthout actually meeting. 

 Taken on the reef in Male and Minikoi Atolls. 



EXPLANATION OF PLATE XXXIIL 



Fig. 1. Dromia ruviphi, young individual; a. whole animal, h. one of the long hairs on the back; 

 c, d. short hairs on the back. 



Fig. 2. Dromidiopsis tridentatus ; a. whole animal, from above. The carapace is ratlier longer 

 than is shown in the figure. 



Pig. 3. Cryptodromia hirsuta ; a. wliole animal, b. end of the fifth leg, c. one of the hairs on 

 the ridge overhanging the furrow just behind the front, d. small hairs on the back, 

 e. long hair on the back, f. hairs on the legs. 



Fig. 4. Cryptodromiopsis tridens ; a. whole animal, 6. end of the fifth leg. 



