1918.] ToKio Kabukaki : Triclad.s of the Inle Lake. 191 



Outside them the canal is svurounded by a lai"<;e number of cells, 

 which seem to be of a glandular nature. Processes from these cells are 

 sometimes observed to extend right to the internal epithelium. In one 

 individual, I have found spermatozoa in considerable quantity in the 

 lumen of the canal. 



Planaria annandalei, n. sp. 

 PL XXVII, figs. 2, 6, 7. 



This new species is based on a single specimen (W. ~^) which was 

 collected about half a mile off Kyezagon, in the Inle Lake, Southern 

 Shan States, from a muddy bottom in about 7 feet of water. 



The body -shape in the preserved condition is closely similar to that 

 of PI. torva and polychroa in the same state. The head is broadly rounded 

 and merges into the trunk, from which it is indistinctly separated by 

 a slight neck-like narrowing. From the region of the genital organs 

 the sides of the trunk converge backward to the rounded posterior 

 extremity. The specimen measures about 6 mm. in length and 1-5 mm. 

 across in the broadest part of the body at the pharyngeal region. 



The dorsal side of the specimen is of a buffy-brownish colour, which 

 acquires a much darker tone in the median parts from behind the eyes 

 to the posterior body-region. The ventral surface is of a much lighter 

 colour than the dorsal side. 



Two crescentic eyes, each surrounded by a small oval space with- 

 out pigment, lie slightly in front of the line drawn across in the broadest 

 part of the head ; the distance between them is about equal to that 

 between either of them and the lateral head margin of the same side. 



The auricular sense organ of each side, visible as a slender colourless 

 streak, extends posteriorly from the level of the eyes, exactly as in PI. 

 polychroa. 



The epidermis is somewhat thinner on the dorsal surface than on the 

 ventral or at the body-margin. It nowhere contains rhabdites except 

 on the head near the anterior margin, where they are found in very 

 small numbers, evidently situated between the epidermal cells. In 

 the part of the body just indicated and immediately beneath the dermal 

 musculature, there occur such rhabdites as are still contained in their 

 mother cells. These are scattered in a sparse number in the paren- 

 chyma. There are some eosinophil glandular cells, situated in the 

 parenchyma, opening to the exterior at various points of the entire 

 body-surface, much as in the preceding species. 



The mouth is situated at the end of the middle third of the body. 

 In the specimen examined the pharynx is entirely missing, apparently 

 having been lost by breaking through the dorsal body-wall before pre- 

 servation. The unpaired anterior main trunk of the intestine extends 

 to a point in front of the brain. It seemed to be provided with at 

 least 8 pairs of lateral branches, while each of the posterior trunks 

 gives off a larger number. Among the columnar cells of the intestinal 

 epithelium Minot's glands are but rarely found. 



The genital aperture lies slightly in front of the middle of the pos- 

 terior third of the body. It leads directly into the simple penis-sheath 



