1914.] S- Kemp : Notes on Crustacea Decapoda. 101 



sivfs gilakarai Ramnad D.st S. India. | g_ ^^ ^,, ,^^,^^_ 



s4_7^-s Pamban, Ramnad Dist., S. India.) ^ •" ^ 



Lafreutes pygmaeus was common at both of the above 

 localities living among weeds in a few feet of water; in life the 

 species bore a close general resemblance to the British Hippolyte 

 prideauxiana. The collection, made in the month of February, 

 includes a large proportion of ovigerous females. 



The species has been recorded by Nobili from the S. E. 

 coast of Arabia and the Red Sea. 



Latreutes mucronatus (Stimpson ). 

 Plate III, figs. 8-15 ; plate IV, figs i, 2. 



i860. Rhynchocyclus niiicronatiis, Stimpson, Proc. Acad. Sci. Phila- 

 delphia, p. 28. 



1902. Latreutes mucronatus, Doflein, Abhandl. bayerisch. Akad. Wiss., 

 XXI, p. 638,. pi. V, fig. 6. 



1904. Latreutes gravieri, Nobili, Bull. Mus. Hist, nat., p. 231. 



1906. I^atreutes gravieri, Nobili, Bull. sci. France et Belg., XL, p. 39, 

 pi. iii, figs. 4-44. 



1906. Latreutes gravieri, Nobili, Ann. Sci. nat. Zool. (9), IV, p. 41. 



1906. Latreutes mucronatus var. multidens, Nobili, ibid. p. 41, pi. n, 

 fig- 3- 



Examination of a series of specimens from S. India suggests 

 that L. gravieri must be regarded as a synonym of L. mucronatus 

 and that there is no foundation for the retention of the varietal 

 name multidens. 



The series comprises twenty-nine examples, and of these 

 eighteen were immediately separated from the rest on account of 

 their stout and gibbous form and more or less circular rostrum 

 (pi. Ill, figs. 8, 9 ; pi. IV, fig. I). They were at once referred to 

 L. mucronatus and examination of their rostral formulae indicated 

 that the type specimen of L. mucronatus with a formula of f and 

 those referred by Nobili to his var. multidens, with formulae 

 ranging from '^^^-^y are only terms in a series exhibiting con- 

 tinuous variation. The formulae which the S. Indian specimens 

 yield are as follows ' : — 



1)10 i)ii 1)9 i)7_ 1)12 1)9 

 II 9 tt 8 7 7 



1)7 3)10 3)9 1)8 4)13 



The remaining specimens characterized by their more slender 

 form and narrower rostrum (pi. HI, figs. 10,11; pi. IV, fig. 2) 

 afforded a more difficult problem. Not only did the rostrum 

 exhibit a most remarkable diversity of form, but the proportions 



* The figure on the left, separated by a bracket, represents the number 

 of teeth on the carapace in the median line. 



