39 



In tlie male, in addition to tlie usual appendages of the first two abdominal 

 somites, rudimentary appendages may be present on the next three somites. 



The sternal grooves of the female are ividely separated and inconspicuous 

 and do not quite reach to the level of the genital pores, as in Dynomenc. 



Branchial formula not known. 



VMi-ihiitiou : Bay of Bengal, Andaman Sea, 70 to 112 fathoms. 



Keij to flic sjh'cii-s of Sphferodromia. 



I. The antei-o-laferal borders of tlie carapace run nearly up to the outer 



orbital angles ... ... ... ... ... S. hnidalli. 



II. The antero-liiteral borders of the carapace run nearly up to the angles 



of the buccal cavern... ... ... ... ... S. mix. 



SpJixroih-omia Krudalli, Alcock ^t Anderson. Plate IV., figs. IS, 18'r. 



Dromidla KendalU, Alcock & Aiuleraon, J. A.S. B., LXIII.. pt. 2, 18!)1-, p. 173: Ulastriitioiis of the Zoolniry 

 of the Investigator, Crustacea, plate xxiv, figa. 1, lu. 



All parts covered with a thick, yellowish, velvet-like tomentum. 



Carapace subcircular, globose, smooth when denuded, cxcejit for some 

 scattered vesiculous granules on the pterygostomian regions and sidewalls ; the 

 cardiac region well defined and the " cervical " gi'oove distinct : the antero- 

 lateral borders, which are subcristiform and entire (except, perhaps, for a vesi- 

 culous granule or two) end at the orbital angle. 



The front consists of two blunt triangular teeth. The upper border of the 

 orbit is smooth and slightly notched near the middle : the lower wall of the orbit, 

 outside the basal joints of the antennules and antenna; consists of a bluntly 

 triangular tooth : the outer orbital angle is rounded off. 



The external maxillipeds when closed leave a wide gap between their 

 anterior border and that of the buccal cavern. 



The chelipeds, which are about a dactylus length longer than the longest 

 legs, arc about 1^ times the length of the carapace : vesiculous granules are 

 present on all the edges of the arm, on the upper and outer surface of the wrist, 

 and everywhere on the hands except the lower part of the inner surface : the 

 wrist is a longish joint, not much shorter than the arm or palm, and has not its 

 inner angle well defined. 



The last two pairs of legs are about half tli(^ length of the other two : eacli 

 ends in a small claw-hke dactylus which is opposed to 2 or 3 tiny spinules at the 

 end of the projiodite. 



