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



Dichogaster Crawi, sp. no v. 



Plate VI, Figs. 82-94B, 112, 113. 



Definition. — Length 40 mm. Somites 120. Prostomium and somite I are 

 reduced. Clitellum complete, in ^ XIII->^ XX. Genital zone sunk, nar- 

 row, from XVI-XVIII. Male pore on papillae in XVII, in line with setae ab. 

 Setse strictly paired, faintly ornamented. Setse ab absent in XVII. Penial 

 setae straight with seven knees on each side. Dorsal pores begin 1 1 I/I V. 

 Spermathecal pores VII/VIII, VIII/IX, in front of setae ab. Testes in X 

 and XI. Ovaries in XIII. Racemose sperm-sacs in XI and XII, postseptal. 

 Ovisacs, one pair in XIV. Oviducts in XIV, opening into separate pores, 

 situated close to and interior to setae ab. Gizzards two, in VII and VIII. 

 Tubular intestine begins in XII. Sacculated intestine begins in XIX. Typh- 

 losole large, commences in XXIII, zigzags on dorsal side. Calciferous 

 diverticles in XV, XVI, XVII, with one duct in XVI. Last heart in XIV. 

 Prostates confined to somite XVII. Sperm-ducts open immediately behind 

 prostates in the same papilla. Micronephridia in four rows on each side of 

 the median line. 



Habitat. — Honolulu, Hawaii. Found among the roots 

 of plants received at San Francisco. Collected and pre- 

 sented by Mr. Alexander Craw, State Horticultural Quar- 

 antine Officer of California, after whom I take pleasure in 

 naming the species. One specimen was also received from 

 the plant-house at Del Monte, California, taken in June, 

 1897. The worms when alive showed great activity, jump- 

 ing several inches into the air when touched. 



The specimen from Del Monte differed from the Hawaiian 

 specimens in the disposition of the nephridia and in having 

 a little longer spermathecae. Dichogaster Craxvi is nearest 

 related to Dichogaster saliens. Judging from Beddard's 

 rather short description, the two species differ from each 

 other in the following particulars: — 



Dichogaster Crawi. Dichogaster saliens. 



Somite I reduced. Somite I normal. 



Penial setae with a fine hair tip fur- Penial setae without fine hair tip. 

 nished with a knob. 



The posterior calciferous diverticle The posterior calciferous diverticle 



connected by a ciliated duct with the. connected with the upper part of the 



duct of the anterior diverticle. anterior diverticle, and without any 



ciliated duct. 



