250 BULLETIN 201, UNITED STATES NATIONAL MUSEUM 



the sixth joint divided into five subjoints. (6) The telson (fig. 93, c) 

 is triangular, twice as long as broad at the base, apex narrowly trun- 

 cate, almost rounded, and armed with two pairs of spines, the outer 

 of which are twice as long as the inner ; the lateral margins are armed 

 along the distal part of their length only, by 25 spines grouped in 

 series of one or two shorter spines between the longer spines. (7) The 

 inner uropods have two spines on the inner lower margin near the 

 statocyst. (8) The fourth pleopod of the male (fig. 94, b), with the 

 exopod three- jointed, the proximal joint very long, four times as long 

 as the combined length of the second and third joints, which are small 

 and subequal ; the third joint is terminated by two long barbed setae, 

 which are nearly three times as long as the combined length of the 

 last two joints of the exopod. (9) The fifth pleopod of the male (fig. 

 94, <?) consists of a greatly elongated sympod terminated by an ex- 

 ceedingly long seta, which is nearly twice as long as the sympod and 

 extends backward beyond the outer uropods. 



HETEROMYSIS ANTILLENSIS Verrill 



H&teromysis antillensis Verrill, 1923, p. 184, pi. 49, fis. 2, a-2, /. 



Distribution. — Dominica Island. 



Remarks. — As mentioned above this species* is not recognizable 

 from the description given by Verrill. It is probably synonymous 

 with H. bermudensis, but this point must await solution until more 

 material is available. 



NEW GENERA, SPECIES, AND VARIETIES DESCRIBED HEREIN 



Lophogaster americanus (p. 17) 

 Lophogaster japonicus (p. 19) 

 Siriella vulgaris var. rostrata (p. 63) 

 Siriella panamensis (p. 76) 

 Oastrosaccus philippinensis (p. 90) 

 Gastrosaccm mexicanus (p. 98) 

 Anchialina zimmeri (p. 103) 

 Meterythrops microphthalma (p. 113) 

 Q-iboerythrops philippinensis (p. 122) 

 Synerythrops cruciata (p. 124) 

 Amblyops ohlinii (p. 130) 

 Pseudomma oculospinum (p. 135) 

 Mysidopsis mortenseni (p. 145) 

 Metamysidopsis (p. 146) 

 Bathymysis renoculata (p. 153) 

 Pseudomysis dactylops (p. 157) 

 Inusitatomysis serrata (p. 160) 

 Stilomysh major (p. 177) 

 Mysidium integrum (p. 223) 

 Diamysis americana (p. 226) 

 Antromysis anophelinae (p. 230) 



