IQIQ-] S. Kemp: Notes on Crustacea Decapoda. 311 



a. Antero-lateral portions of carapace much in- 

 flated and separated bj- an abrupt declivity 

 from outer orbital angles ; 4th segment of male 

 abdomen anleriorly emarginatc, not constricted, 

 5th longitudinally channelled ; abdomen of 



female with convex lateral margins . S. investigatoris. 



b. Antero-lateral portions of carapace not greatly 

 intlated, sloping gently to outer orbital angles ; 

 4th seg'ment of male abdomen much constricted 

 anteriorly, ^ih not channelled ; abdomen of 



female with concave lateral margins S. fyroxiiiin. 



II. Ischium of third maxillipeds shorter than merus. [Chela 



with strong- carina or row of granules near inferior 



border.] 



A. Ischium and merus of outer maxilliped studded with 

 coarse tubercles. [Merus about twice as long as 

 ischimn ; carpus of malecheliped without tooth at inner 

 angle.] ... ... ... S. koc/ii. 



b. Ischium and merus of outer m.'ixilliped smooth, or 

 nearh' so. 



1. I'pper surface of carapaci- sculptured ; merus of 

 third maxilliped three times as long as ischium ; 



carpus of male cheliped '.' . ... ... A', sigilloi'iim. 



2. Upper surface of carapace without e\'id(_'nt sculp- 

 ture ; merus of third maxilliped onl\' ,'i little 

 longer than ischium ; carpus of male cheliped 



with a tooth at inner angle ,. S. iiiflafa. 



The species fall into four groups. Firstly the very highly 

 specialized 5. crabncauda which differs widely in the form of the 

 male abdomen from au}^ other species of the genus. Secondly 

 5. glohosa and 5. piiula which are normal forms. Thirdly S. 

 investigatoris atid 5. proximn , allied to the foregoing but distin- 

 guished by the presence of a ridge which bisects the lympana on 

 the walking legs, and fourthly S. kochi, S. sigillormn and S. inflata 

 which, though true Scopinieras, show affinity with Dot ilia in the 

 proportions of the merus and ischium of the third maxillipeds and 

 in the presence of a certain amount of sculpture on the lateral walls 

 of the carapace. 



The Inrush of hairs between the bases of the first and second 

 walking legs is very conspicuous in all the species of the genus 

 that I have seen. A similar character is sometimes found in 

 Tympanoiiienis, but occurs between the bases of other legs as well 

 and is always much less easih' detected. 



5. crahricauda, S. pihda , S. investigatoris and 5. proxiuia are 

 Indian species. 



Scopimera crabricauda, Alcock. 



1900. Scopiiuera crabyicaiutd, .\lcock, jourii. Asiaf. Soc .l-lciigal l,.\i.\, 

 p. 370, and Illiisfr. Zool. R.I. M.S. ' Iiivesfigafor.' Crust , pi. Ixiii, 



In addition to the particulars given by Alcock it may be noted 

 that in both sexes on the inner face of the chela there is a large 

 blunt ridge, dorsally convex, extending from the base of the fixed 

 finger to the carpal articulation. There are three finely serrate 

 carinae on the fixed finger; the outer and inner reach only a short 



