212 bulletin: museum of comparative zoology. 



The anal valves exceedingly strongly compressed, much more so 

 than in T. lumbricinus and not narrowly margined as in T. garmani. 

 Number ol segments, fifty-five. 

 Width, (male type) 3.1 mm.; length near or a little over 40 mm. 



149. Trigoniulus garmani, sp. nov. 



Type.— M. C. Z. 4,446. Paratype.— M. C. Z. 4,447. Martinique: 

 Mont Rouge, February, 3, 1879. Samuel Garman. 



At once distinguished from T. lumbricinus in its obviously smaller 

 size and much darker color. In place of the ordinarily brick-red color 

 of T. luvihricinus the present species is a dark slate-blue with the 

 segments narrowly bordered behind with reddish. The coUum is 

 black, narrowly bordered both in front and behind with reddish. 

 Head also dark, becoming paler toward labrum. Anal tergite and 

 valves also blackish, narrowly margined with reddish. 



The sculpturing is clearly different from that in T. lumbricinus, the 

 surface caudad of the suture being much smoother while that in front 

 is more coarsely but much less densely impressed, the impressions 

 along to suture being of the same characteristic circular, semicircular 

 or crescent form but elsewhere coarsely punctate or wholly lineate. 



The anal scutum very nearly equals the valves. The latter, in 

 contrast with those in T. lumbricinus, which are widely compressed, 

 are narrowly and sharply margined, the margining grooves deep. 



The male gonopods differ much. 



Number of segments, fifty or fifty-one. 



Length (female) about 38 mm. ; width, 3.5 mm. ; length of male near 

 32 mm. ; width, 3 mm. 



149a. Trigoniulus remotus, sp. nov. 



Ttjpe.— M. C.Z. 4,448. Swan Island, April. 1913. George Nelson. 



In coloration approaching T. f rater more closely than any one of the 

 West Indian species. The main part of each typical somite is blackish, 

 lighter on the sides from the inclusion of light areas; the extreme 

 caudal margin is narrowly bordered with flavous and adjoining this is 

 a wider annulus of brown which shows often a distinct reddish tinge 

 and does not extend to the suture; the anterior border of the somite 

 is flavous, this color encroaching a variable distance caudad upon the 

 black and more so above than laterally. The anal scutum black 



