220 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



marking the prostate pores. A zone of pellucid cells in the equator of 

 each somite. Setas paired. Penial setae present, but not ornamented. 

 Gizzards in V and VI. Tubular intestine ciliated. Diverticles of the intestine 

 in XV, XVI, XVII, each opening independently into the intestine. The two 

 anterior with crystals. Sacculated intestine in XIX. Spermathecae in VII 

 and VIII; their pores VI/VII, VII/VIII; each with a rosette-like pluri-cham- 

 bered diverticle near the base. Sperm-sacs racemose, two pairs, in XI and 

 XII. Sperm-masses in X and XI. Testes and funnels in X and XL Ovaries 

 in XIII. No ovisac. Prostates open in the equator of XVII and XIX. 

 Sperm-ducts open in the equator of XVIII. A dorsal typhlosole beginning 

 in XXVI. Last heart in XII; a trace of septal, but no subpharyngeal glands. 

 Suprapharyngeal glands slender, in four lobes. Micronephridia in five rows 

 on either side. 

 Septal formula: — 



VI/VII, VII/VIII, viii/ix, n^, }^ri, XI/XII, XII/XIII, XIII/XIV, 

 XIV/XV. 



Habitat. — Found in garden soil in the City of Guatemala, 

 Central America. 



This species differs from B, mexicana in several partic- 

 ulars. The setae are closely paired and the distance a-h is 

 equal to the distance c—d. The nephridia are in five rows, 

 while in B. mexicana they are in three rows. 



Detailed Description. 



The setce are closely paired and the ventral interval is 

 about one-fourth larger than the lateral. The penial setae 

 are almost straight and their apex is straight, smooth and 

 without ornaments. The prostates terminate on small 

 papillae. 



The se-ptal glands, situated close to the intestine in 

 VII-XIII, are hardly perceptible and only one or two cells 

 thick. 



The nephridia are highly developed micronephridia in all 

 the posterior somites. They are arranged in five rows on 

 each side of the median line. Of these rows the most ven- 

 tral is the largest. It is also much more branched than the 

 others and occupies the whole lateral interval between setse 

 h-c. Of the remaining micronephridia those in rows 2 and 

 4 are considerably smaller than those in rows 3 and 5. 



