226 A. Alcock — Carcinological Fauna of India. [No. 1, 



The abdomen of the male consists of 5 segments, the 3rd-5th 

 being fused together. 



The species of this genus inhabit stocks of corals and Alcyonarians. 



148. Q.uadrella coronata, Dana. 



Quadrella coronata, Dana, Proc. Acad. Nat. Sci. Philad., 1852, p. 84, and U. S. 

 Expl. Exp. Crust, pt. i. p. 266, pi. xvi. figs, oa-d : Ortmaun, Zool. Jahrb. Syst. X. 

 1897, p. 210. 



Trapezia sp. Miers, Zool. H. M. S. Alert, p. 536, footnote, (see Challenger 

 Brachyura, p. 163 footnote). 



Carapace squarely hexagonal, moderately convex, perfectly smooth, 

 polished, about as long as broad. Au acute procurved spine at the open 

 angle of junction of the antero-lateral and postero-lateral borders. 



Front with 6 horizontal spines, the four larger of which belong to 

 the front proper, the other two being at the lower inner angles of the 

 orbits which are much more prominent than the also spiniform upper 

 inner angles. 



Outer angle of orbit acute : eyes small, the diameter of the cornea 

 about a tenth the length of the carapace. 



Chelipeds smooth and polished, about 2| times the length of the 

 carapace, the arm and the palm each being nearly as long as the carapace. 

 The whole arm, as well as the end of the ischium, visible, from above, 

 beyond the carapace ; an acicular spine at the inner angle of the 

 ischium and from six to ten such spines along inner (anterior) border 

 of arm ; one, or two, little spines sometimes, but not always, present at 

 inner angle of wrist : lower border of hand quite smooth. 



Legs long slender, about If times the length of the carapace : a 

 few silky hairs on dactylus and propodite, and sometimes a very few on 

 the carpus also : the inner edge of the dactylus strongly toothed. 



Colours in spirit, milkwhite. 



In the Indian Museum are 9 specimens from various parts of the 

 Indian coasts and islands and from depths of 28 to 88 fathoms (one 

 specimen from ? 7 fathoms). 



Quadrella coronata var. maculosa, nov. 



Differs from the typical form in the following: particulars : — 



(1) the greatest breadth of the carapace is distinctly more than 

 the greatest length (including frontal spines) : 



(2) the chelipeds, under a lens, are frosted over with tiny granules : 

 the anterior border of the arm is finely denticulate, with 2 or 3 spines 

 at the distal end only ; the inner border of the hand and thumb is finely 

 denticulate : 



