154 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 30 Ser. 

 Septal formula: — 



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



XllI/XlV, XIV/XV. 



Habitat. — This species was found to be common in 

 southern California where I have collected it on Santa 

 Rosa Island and at Santa Barbara. On the island it appears 

 to be the most common species and there can be no doubt 

 but that it is indigenous. 



M. elegans is represented in the eastern United States by 

 M. carolincB, the main difference between the two being 

 the manner in which the sperm-ducts join the prostates. In 

 M. eleg-ans the junction is in the body-wall, while in Af. car- 

 olince the sperm-ducts join the prostate half-way between 

 the body-wall and the glandular part. The former species 

 is much more delicate than the latter, which may be 

 readily transported long distances without injury. 



Microscolex carolinas, sp. nov. 



Definition. — Length 90-110 mm., width below clitellum 4 mm. Prosto- 

 mium incomplete. Dorsal pores posterior to clitellum. Clitellum perfect, 

 XIII-XVII. Setae rather distant; those in the ventral couples and posterior 

 to clitellum converging towards the male pores, but those in front of the 

 clitellum not converging. Oviducal pores in line with setse a. Spermiducal 

 pores in XVII. Penial setse present. Testes in X and XI. Sperm-sacs 

 small and very racemose in XI, XII. Rudimentary gizzard in V. No 

 spermathecse. Sacculated intestine in XVII. Nephridia without sphincter. 

 Color flesh with a brick red clitellum. 



Septal formula:— 



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



XIII/XIV, XIV/XV. 



Habitat. — The specimens were collected in the uplands 

 near Raleigh, North Carolina, by Messrs. Brimley. 



This species is more robust and of a deeper color than 

 M. elegans. The principal differences appear to be the 

 following: The sperm-ducts join the muscular part of the 

 prostate half-way between the body-wall and the glandular 

 part. The nephridia do not seem to possess the sphincter, 

 and the sperm-sacs are much more racemose and the lobes 

 narrower than in M. elegans. 



