PUNNETT AND FOESTER COOPER — NEMERTEANS, 7 



Numerous small and degenerate eyes occur which are entirely destitute of pigment. 

 The circular head-furrow is thrown up into a numher of short longitudinal ridges greatly 

 resembling those described for B. indicus, Punnett (Fauna & Geogr. Maid. & Lace. 

 Arch. i. pt. 1, p. 105). 



9. Baseodiscus hemprichii (Ehrbg. 1831). 



Localitij. Ooetivy I. 

 Two specimens. 



10. Linens albovittatus (Burger, 1890). (Plate 1. fig. 10 ; Plate 2. fig. 14.) 



Literature. Burger, Zeit. f. wiss. Zool. 1890. 



Punnett, R. C, Willey's Zool. Soc. Results, pt. v. 1900. 



„ Proc. Zool. Soc. 1900. 



Staub, Semon's Zool. Forscbungs. 1900. 

 Punnett, R. C, Fauna & Geog. Maid. & Lace. Arch. pt. i. 



Locality. Salomon, Chagos ; on reef. 



A single much-contracted specimen 80 mm. long and 5"5 broad. Colour dark olive- 

 green with characteristic zigzag yellowish-white band on head. 



We refer this specimen to L. albovittatus, though it differs in one or two points from 

 previous records. 



The epithelium (PL 2. fig. 14) is high and rests upon an exceedingly thin base- 

 ment-membrane ; the lower portion is closely packed with greenish glandular cells, to 

 which the coloration of the animal is very largely due. There are distinct circular and 

 longitudinal muscle-layers in the cutis, and the cutis-glands are separated from the 

 outer longitudinal muscular layer by a sheet of gelatinous connective tissue which is 

 thicker than the combined cutis and epithelium. 



The vascular system, which contains a corpusculated fluid, has a well-marked head- 

 loop. The rhynchocoelic vessel leaves the proboscis-sheath just behind the mouth- 

 opening at the level where the nephridial tubules cease. 



The excretory system is first found at the level of the middle mouth-region, and 

 extends a short way behind its posterior limit ; the tubules do not extend ventrally 

 below the nerve-cord, while dorsally they reach nearly to the rhynchocoel ; they open by 

 a single pair of large ducts at the hinder limit of the mouth, the pores being situated 

 laterally close above the nerve-cords. 



In the brain the dorsal lobe of the dorsal ganglion is very large. The head-slits reach 

 almost to the brain and are not prolonged behind the cerebral organ. 



Numerous small eyes occur, mostly at the tip of the snout; a frontal organ is 

 present, though not of the usual form, being single instead of trifid. 



Another specimen in poor condition was obtained by Mr. Crossland from Wasin, 

 Brit. E. Africa. 



11. Linens mascarensis, sp. n. (Plate 2. fig. 15.) 



Locality. Zanzibar (Crossland Coll.). 



Several specimens of this small species were obtained. The colour after preservation 



