^2 AMl'HIPODA. 



Fnm. 25. J A s s i D M. 



*BRUZELIELLA FALCATA (Montagu). 



Synonyms are Cancer Gamma i' us falcatus, Montagu, and 

 Podocerus falcatus, Bate, ^junior; the nail of the "second 

 gnathopod in Montagu's figure being abnormal. Jassa 

 pulchella of Leach, and Podocerus pulchellus, Bate, the 

 adult (J; Podocerus pelagic us. Bate, $. 



Good illustrations of the second gnathopods in $ and $ 

 at different ages are given by Nebeski (Beitr. z. Kennt. d. 

 Amphip. der Adria, 1880, pi. iv.). 



The tooth on the nail in Montagu's figure of falcatus is an 

 occasional outgrowth. Walker says that he has in his collec- 

 tion an adult Jassa falcata, 10 mm. long, which has such a 

 tooth on the dactylus, and we have ourselves such specimens; 

 while a swelling in that part of the dactylus, where the tooth 

 occasionally appears, is by no means uncommon. The 

 Podocerus Ilerdmani, Walker = P. odontotn/x, Sars, judging 

 from the small size of these males, probably represents the 

 same condition in B. pusilla, and we have that condition 

 (taken with normal form) from Shetland. The fullest 

 developed gnathopod of Microjassa cumbrensis figured by 

 Stebbing (Trans. Zool. Soc. vol. xiii. pi. vi. B. fig. yn. 2 A) 

 shows a tubercle on the nail, and this seems to be the general 

 form in adult males of M. cumbrensis ; but the absence of the 

 tubercle is not uncommon in this species, while the nail in one 

 of our specimens has two such tubercles (see also Walker, 

 Ann. & Mag. Nat. Hist. ser. 7, vol. iii. p. 3'J4). 



For remarks on the genus Podocerus, see further on under 

 Platophiu.m. 



Ilfracombe, Exmouth, Starcross, Plymouth, Falmouth, 

 Scilly Isles. In 1884 immense numbers were found on a 

 buoy which had been taken up at Falmouth. Among these 

 were examples of males with the toothed nail ; they in other 

 respects entirely agreed with the normal form, and were at 

 the time regarded as of no special interest. 



BRUZELIELLA PUSILLA (G. 0. Sars). 



1863. Podocerus varicyatus (nee Leach), Bate & Westwooil, vol. i. 



p. 439, $. 

 1894. Podocerus pusillus, Sars, p. 596, pi. ccxii. fig. 1, rf $. 



The figures of Podocerus variegatus of Bate (not Leach) 

 seem to have been drawn from the female of B. pusilla. The 

 main figure, as well as the details, clearly show that it has 

 nothing to do with Jassa pelagica to which Boeck assigned it. 



* For this genus, see under Jassa pclayica. 



