NO. 1919. FISHES FROM JAVA— BEAN AND WEED. 603 



GYMNOSARDA ALLETERATA (Rafinesque). 



Four specimens, three about 250 mm. each, one about 300 mm. 

 long. Batavia. 



AUXIS THAZARD (Lac6p6de). 



One specimen, 240 mm. long. Batavia. 



SCOMBEROMORUS COMMERSONn (Lac6p6de). 



Six sporimoiis, 170 to 230 mm. long. Balavia. 



SCOMBEROMORUS GUTTATUS (Bloch and Schneider). 



Two specimens, 110 and 170 mm. long and three doubtful, 55, 170, 

 and ISO mm. long. Batavia. 



So far as we can identify them, there are sLx specimens of S. 

 commersonii in the collection. The others are not this form but 

 might with equal propriety be assigned to any one of four species: 

 S. huJilii, S. guttatus, S. lineolatus, and S. intemiptus, all of which 

 may ultimately be assigned the same name. We have, therefore, 

 used the oldest name, Scomheromorus guttatus. 



TRICHIURUS HAUMELA (ForskSl). 



Seven specimens, 140 to 280 mm. long. Batavia. 



These specimens are labeled Tricliiurus Tiaumela, to wliich species 

 they probably belong if, as seems rather doubtful, this and T. japoni- 

 cus are really specifically distinct from T. lepturiis. We do not have 

 a sufficient series of specimens to determine this point. T. coxi,^ 

 of which we have two specimens, shows some characters which may 

 prove of value. 



We have tliree specimens, apparent^ T. muticus, which show the 

 common characters of a more nearly straight lateral line and of the 

 presence of minute scales indicating the position of the reduced ven- 

 tral fins. These scales are almost invisible to the naked eye, but 

 are readily apparent under a lens when their position has been shown 

 by the use of a veiy fine dissecting needle. A coarser needle would 

 be apt to destroy them without giving an indication of their presence. 

 We have not been able to find these scales in other specimens exam- 

 ined. 



The species of Trichiurus are so very similar in appearance and the 

 various individuals of a single species show such great difi'erences, 

 especially in depth of body anil m relative length of the various sec- 

 tions of the body, that it is probable we must look for differentiid 

 characters in the internal anatomy or else greatly reduce the number 

 of nominal species. 



Trichiurus lepturus is plaiidy distinguished from T. muticus by its 

 larger size, lack of ventral scales, more elongate Gess markedly tri- 

 angular) heail and much stronger dentition. .Also, the lateral line 



I Ramsay and Ogilby, Proe. Lina. Soc. N. S. Wales (2), vol. 2. p. 562. 



