ZooL.— Vol. II.] EISEN—OLIGOCHMTA. 87 



An account of the family of Enchytraeidse, of which 

 there are at least over fifty new species on the Pacific Coast, 

 is now under way and it is expected will be finished during 

 the coming year. 



The author is under great obligation to those who have 

 contributed to his work by presenting specimens. Among 

 those who have thus aided in making known our interesting 

 and important fauna of Oligochaeta are: Professor Albert 

 Koebele of Honolulu, Hawaii; Professor C. H. Gilbert and 

 Mr. R. C. McGregor of Stanford University; Dr. H. W. 

 Harkness and Mr. Alexander Craw of San Francisco; 

 Professor C. H. Tyler-Townsend of Las Cruces, New 

 Mexico; Professor Frank Smith of Champaign, Illinois, 

 and Messrs. Brimley Brothers of Raleigh, North Carolina. 



GEOSCOLECID^. 



Pontoscolex Schmarda. 



Pontoscolex corethrurus(^7^r. Mu Her )mexica.nus, subsp. nov. 



Plate V, Figs. 1-16; Plate VI, Figs. 17-23; Plate VII, Figs. 24-26,35-37. 



DeJiniHon. —hength 95-110 mm. (those from Baja California 200 mm.); 

 diameter 3-4 mm.; somites 145-212. Setce bifid, slightly ornamented; setae 

 c and d wider apart in II than they are in III and IV; setae c in II in line 

 with d in III; setae d^ in II more dorsal than setae d in III and IV. Penial 

 setae with eight or nine pockets at apex. Prostomium present, but retract- 

 ile; mouth at apex and terminal. Caudal zone 28-76 somites from tail-end, 

 and 107-118 somites from the head. Clitellum in XV-1/4 XXIII. Tubercula 

 pubertatis in XIX-XXII. Gizzard in VI. Sacculated intestine commences in 

 XVII. Calciferous diverticles in VII, VIII, and IX. Spermathecal pores 

 in the posterior part of VI, VII, VIII, but the main body of the spermathecae 

 respectively in VII, VIII, IX. The spermathecal duct about five times longer 

 than the pouch. Nephropores in line with setae c and d in all somites except 

 III, where they are absent, and in II, where they are slightly more ventral 

 than in c. Hearts in XI and XII. One pair of testes in XII. One pair of 

 sperm-funnels in XII. Ovaries in XIII; oviducts in XIV. One pair very 

 long, dorsal sperm-sacs extending to the posterior part of the clitellum. 

 Spermiducal pores in the anterior part of XXI. Septal formula: — 



III/IV, O, O, VI/VII, VII/VIII, VIII/IX, O, X/XI. 

 No additional capillaries in the caudal zone. 



(i) December 14, iS 



