132 CALIFORNIA ACADEMY OF SCIENCES. 



especially so ou the posterior ones. The general structure of the nephridial canals 

 and their windings resembles those of fully developed nicga-nophridia (figs. ;i9, 40, 

 41), but the siuallness of these organs jjrevented ine from definitely ascertaining the 

 relative size and structure of all the canals. The canal leading to the outlet duct is 

 strongly ciliated. Fig. 41, which represents the inner part of one of the anterior 

 iiephridia is held somewhat diagrammatic, as the respective thickne.s.ses of the canals 

 couUl not be properly delineated. I believe the most anterior nephridia are found in 

 iii, in which somite they are very large, crowding each other. 



Benhamia palmicola n. subsp. 

 Figs. 43-55. 



Habitat. Miraflores, in the Cape Region of P>aja (Adifornia, some 40 miles 

 north of San Jose del Cabo; also around Tepic, territory of Tepic, on the Pacific 

 Coast of Mexico. The altitude of Miraflores is about 1,000 feet, wiiile that of the 

 City of Tepic is about 4,000. Probably the species does not descend to the hot low- 

 lands of the coast belt, at least no specinunis have been found cither at Han Jose del 

 Cabo or at San Bias. 



Color. The specimens are pink flesh, much less opaque than B. nana, no pig- 

 ment cells. 



General Remarks. For the present I arrange this as a subspecies under 

 B. Bolnr'u from which it differs in several points of considerable importance. These 

 are the difl'eix'ut form of spermathecas the situation of the first dorsal pore, the differ- 

 ent sculpture of the largest penial seta, the location of the gi/zard, tlie number of 

 sperm-sacs, etc. 



EXTERIOR CHARACTERS. 



Size 50 to 00 mm. 



Somites 110. 



Clitellum incomplete in all somites xiii-xx. 



Dorsal poies, most anterior one between iv-v. 



Spermathecal pores in line with seta^ 1 and 2, between vii viii and viii'ix. 



Ociducal pore. One central median oviducal pore in xiv. 



Penial setm, two in each sac. The longer seta has apex curved and furnished 

 with four blunt, bristle-like crenulations. The smaller seta has tlie point slightly 

 forked, one j)rong being longer, and a thin mendjrane extended between the two forks. 



Cniiunon setdi. About equal distance between the dorsal and ventral couples 

 as between the ventral couples. 



INTERNAL CllAKArrKKS. 



Buccal canity with a dorsal pocket of sense organs and glandular cells. 



Pharynx not situated far forward. 



Gizzards liotb apparently in \iii. 



Calciferoas diverticula, '6 pairs in xv, xvi and xviii. 



Septal (J la ads, small in ix and x. 



