NO. 4 schmitt: stomatopods 193 



Lysiosquilla desaussurei Stimpson 



Sqiitlla scabricauda de Saussure, Rev. Mag. Zool. (2), Vol. 5, No. 8, 



p. 367, 1853. 

 Lysiosquilla desaussurei Stimpson, Boston Jour. Nat. Hist., Vol. 6, p. 

 503, 1857. Miers, Ann. Mag. Nat. Hist. (5), Vol. 5, p. 8, 1880. 

 Bigelow, Proc. U.S. Nat. Mus., Vol. 17, No. 1017, p. 504, 1894 

 [in key only]. Kemp, Mem. Indian Mus., Vol. 4, No. 1, p. 203, 

 1913 [listed only]. 



Distribution : The species was based on a specimen from Mazatlan, 

 Sinaloa, west coast of Mexico, and seems never to have been taken again. 



Size: No measurements of the unique original specimen were ever 

 published. 



Remarks: This species, if distinct, is very close to L. scabricauda. It 

 may not, after all, be different. 



De Saussure, upon comparing the specimen which Stimpson later 

 named for him with some individuals of L. scabricauda in the Paris Mu- 

 seum, remarked that the raptorial dactylus was armed with 1 1 teeth, in- 

 cluding the terminal one, and not 8, as in the Paris material. This 

 difference is not unlike that found between males and large, well- 

 developed females of the Indo-Pacific species of L. maculata^^ Here the 

 males will have 9-11 (usually 10) teeth, including the terminal one, on 

 the raptorial dactylus, while the mature females will show but 7-8 nicks 

 along the inner margin, in addition to the terminal tooth. However, 

 Miers (loc. cit.) has already remarked that there are no secondary sex 

 differences in L. scabricauda. There is nothing especially different in the 

 armature of the raptorial dactylus between the sexes ; the teeth seem to be 

 somewhat longer and stronger in well-developed males; the propodi, 

 however, are relatively shorter in the females. The length of the carapace, 

 exclusive of the rostrum, in the male is not more than % the length of 

 the raptorial propodus, while in the female the length of the carapace is 

 % that of the propodus or more. Stated another way, in well-developed 

 males of L. scabricauda the length of the longitudinal axis of the raptorial 

 propodus is as long as the carapace plus twice the length of the rostral 

 plate, while in the female it is rarely longer than the carapace and rostrum 

 taken together. When longer than this, the raptorial dactylus in the fe- 

 male does not exceed the length of the carapace plus, at most, 1% times 



63 Kemp, Mem. Ind. Mus., Vol. 4, No. 1, p. Ill, pi. 8, figs. 86-91, 1913, and 

 synonymy. 



