ZooL— Vol. II.] RISEN— OLIGOCHAiTA. 1 25 



extend to the dorsal wall of the coelom and there is a deep constriction at the 

 center; otherwise the shape is that of the variety. The prostates are very 

 long, extending through ten somites beyond the male pores. Septal formula: 



V/VI, VI/VII, VII/VIII, VIII/IX, IX/X, X/XI, XI/XII, XII/XIII, 

 XIII/XIV. 



Habitat. — Honolulu, Hawaii; from soil in pots of plants 

 from the island. Collected by Mr. Alexander Craw. 



The nephridia also differ somewhat from those of the 

 species. The ccelomic mantel has the form of a very thick 

 S with the dorsal lobe much thicker than the lower lobe. 



Ocnerodrilus (Enicmodrilus) tuberculatus, sp. nov. 



Plate XIV, Figs. 155 and 156. 



Definition.— 'Len^ih. 30 mm., width 2 mm. Somites 104. Prostomium 

 divides somite I into halves; the somite is broader than those behind. Setae 

 paired, ventral and dorso-lateral with smooth margin. No setae ab in XVII. 

 Clitellum saddle-shaped, in XIII-XIX. Somite IX twice as wide as any other 

 somite. Male pores open on a pair of very large papillce in line with seta; ab 

 in XVII; papillce with the body-wall about one-third as long as the body is 

 wide. The three anterior septal glands of nearly equal size, slightly diminish- 

 ing in depth posteriorly; those in VIII the smallest. Spermathecae, one pair, 

 postseptal in IX, stalked, with a very large globular free apical part. Two 

 pairs of testes and sperm-funnels. Sperm-ducts not thickened at the male 

 pores. Prostates large, extending as far as XXIV. Sperm-sacs large, race- 

 mose in IX and XII. No dorsal pores. Meganephridia covered with a few 

 coelomic, glandular cells which, however, are not in sufficient quantity to con- 

 stitute a mantle. Anterior nephridia without such cells. 



Habitat. — The City of Guatemala, Central America. 



This species is readily distinguished externally by the two 

 very large male papillae which are much more prominent 

 than those in any of the other Central American or Mexican 

 species described so far. The incomplete clitellum and the 

 large size of the worm is also characteristic. The single 

 specimen had become discolored and resembles an Acan- 

 thodrilid in the shape of the body. 



Detailed Description. 



The most prominent feature exteriorly is the two male 

 ■pafillcB replacing the ventral pairs of set« in XVII. The 

 base of the papilla is much sunk below the general surface, 



