A. E. Yen-ill Decapod Crustacea of Bermuda. I i:> 



the spinules are crowded in transverse rows, with close fan-shaped 

 groups of yellowish plumose hairs arising from their outer liases. 

 The maims is elegantly ornamented on the outer side with small, 

 rounded, single and clustered tubercles, surrounded by regular 

 stellate and fan-shaped groups of even plumose hairs that radiate 

 horizontally from their bases, except on the proximal side, the tips 

 of the adjacent groups of hairs mostly overlapping, so as to nearly 

 cover the whole surface between the tubercles ; toward the upper 

 margin the tubercles become higher and more pointed or spiniform ; 

 those along the margin are acute spines, bent forward ; on the thumb 

 and dactyl the tubercles of each cluster blend together and form 



*. C3 



larger rounded tubercles, usually paler in color, but carrying plumose 

 basal hairs ; the thumb and dactyl each have, along the cutting 

 edge, a row of five or six strong, rounded, paler teeth and are tipped 

 with a narrow, subacute, but strong black nail or claw, excavate 

 within. 



The inner surface of the mantis is rather smooth, with some 

 scattered, unequal, rounded tubercles, especially on the lower half, 

 and a regular row of larger ones along the lower margin. Many of 

 these tubercles bear terminal clusters or pencils of slender hairs, 

 especially those along the inner edges of the digits, where the pencils 

 of hairs are larger and arise from pits. The dactyl is so articulated 

 that it moves up and down in a nearly vertical plane. 



The right chela is scarcely half as thick and more tapered. The 

 tubercles of the outer surface are low or flattened, and bear com- 

 paratively few longer slender hairs, but those along the upper margin 

 become acute spinules ; on the inner surface the tubercles are flat or 

 scarcely raised above the smooth surface, but have a central hair- 

 bearing pit, and are marked out by the narrow red lines that sur- 

 round most of the tubercles. 



The left leg of the second ambulatory pair is very characteristic 

 in its armature and ornamentation. The two distal segments are 

 triquetral, owing to a strong carina that runs along the middle of the 

 outer side, above which there is a wide and deep sulcus. This 

 carina, on the propodus, carries, on its upper and outer surfaces, 

 about ten or eleven oblique transverse rows of small appressecl 

 tubercles, arising from ridges, and decreasing in size downward ; 

 the proximal rows have six to eight, but the distal ones have only 

 one or two tubercles ; from the basal ridges arise crowded rows of 

 short, appressed, plumose hairs, which cover the intervening spaces. 

 On the dactylus the transverse ridges are shorter but more prominent 



TRANS. CONN. ACAD., VOL. XIII. 31 MARCH, 1908. 



