r.AMMARIT).!-:. 1 (i:} 



52. MICRODENTOPUS. 



MiiTiuli ntopus, Costa, Mend, (hllu lii-a/c Accaii. delle S<i. di Xtipoli, 



IS").-}, p. 171. 

 Lenibos, Spena- Bate, Brit. Assoc. Ri-port, 1855; Ann. Nut. Hist. VA). 



1857. 



IMiite, Hist. Brit. Cnist. p. 180. 

 Gaiiiiiiarus, I)ivi>iiou 4- + , Litjcborij, Of vers. afKongl. Vet.Akad. For- 



Itundl. 1H54, p. 455. 



Body long and slender. Superior pair of antennae longer than the 

 inferior, and carrj-ing a secondary appendage. Mandibles furnished 

 with an appendage. Gnathopoda subchelate ; first pair larger than 

 the second. Thu-d pair of pereiopoda not longer than the two 

 preceding ; fourth pair much, and fifth pair verj' much longer 

 than the others. Posterior pair of pleopoda biramous. Telsoii 

 tubular, conical, and tipped \\'ith a double vertical apex. 



The form of the telson is peculiar, so far as I know, to this genus. 

 It appears like a distinct segment of the body with rudimentary 

 pleopoda. The double apex may have the capability of impinging one 

 part against the other, but I am not aware that either is moveable. 

 If future research should prove them to be so, the animals of this 

 genus ^viU probably be found to possess the power of 1)uilding nests 

 or tubes, and therefore should be grouped amongst the Dojiicola. 



1. Microdentopus Gryllotalpa. (Plate XXX. fig. 1.) B.M. 



^licrodentopus ^rvllotaljia, Cu.sfa, Bend, della Beale Accad. delle Sci. 

 di Napoli, 1853," p. 178. 



Jjcmbos Danmoniensis, Spcnce Bate, Brit. Assoc. Beport, 1855; Syn- 

 opsis, Ann. Nat. Hist. Feb. 1857. 

 rndte. Hist. Brit. Crust, p. 180. 



Male. — Body slender. Three segments of the pleon having the 

 infero-posterior angle rounded. l"'yes roimd, small, wliite, with 

 black spots. Superior antenna} half the length of the animal ; 

 peduncle scarcely half the length of the whole organ ; secondary 

 appendage uniarticulate. Inferior antennae nearly as long as the 

 superior ; peduntle extending beyond the peduncle of the superior, 

 last two joints subequal, flagellum not longer than the last joint 

 of the peduncle. Fii-.st pair of gnathopoda large and powerful ; 

 carpus longer and broader than the pro])odos, infero- anteriorly 

 armed with a strong, shai-p, and slightly curved tooth ; propodos 

 broad-ovate, palm rounded, not defined ; dactylos interiorly ser- 

 rated, the apex impinging against the extremity of the carpal 

 tooth. Second pair of gnathopoda haring no tooth to the carpus ; 

 earjjus as long as the propodos ; propodos scjuare-ovate, palm not 

 oblique, imperfectly defined ; dactylos serrated internally. Pe- 

 reiopoda having the basa of the last three pairs long-ovate, not 

 much dilated. Posterior paii' of pleopoda short, not reaching he- 



M 2 



