ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 703 



region. In view of the limited knowledge regarding Cestodes from 

 regions outside Europe, the details contributed should be of value in 

 furthering the solution of phylogenetic and distributional questions. 



New Trematodes.* — W. S. Marshall and N. C. Gilbert describe 

 from the cascal tubes, stomach, and upper part of intestine of the wide- 

 mouthed black bass, Micropterus salmoides, a small Distomid, whose 

 body is entirely covered with minute spines, arranged in two series of 

 diagonal rows, and which they designate CcBcincola parvulus g. et sp. n. 

 Another, from the same host, of a peculiar yellowish or pinkish colour, 

 occurring in the mouth, stomach, or on gills, is described as Leuceruthrus 

 micropteri g. et sp. n. A third form, Azygia loossii sp. n., has been 

 found not only in the stomach of the f orenamed host, but also in Lucius 

 lucius and Amia calva. 



Structure and Affinities of Trematodes.f — N. Maclaren gives a 

 detailed account of the anatomy of Diplectanurn cequans Wagener, and 

 Nematobothrium moke sp. n., the former of which occurs upon the gills 

 of Labrax lupus, and the latter in pairs within cysts upon the gills of 

 Orthagoriscus moke. Although Diplectanurn is much specialised, it 

 possesses many characteristics of Rhabdocoele-like ancestors — e.g. the 

 presence of rhabdites, as in Temnocephala, in special regions of the head. 



Ceylonese Polyclad Turbellaria.J — F. F. Laidlaw reports on the 

 Planarians collected by W. A. Herdman off Ceylon, along with three 

 collected by Gardiner. The Ceylonese area seems to be very rich in 

 these forms. Three new genera are established : Woodworthia (closely 

 allied to Idioplana), Stylochocestus, and Thalamoplana (closely allied to 

 Discocelis). 



North American Nemerteans.§ — Wesley R. Coe gives a useful 

 synopsis of the species of Nemerteans from the West and North-west 

 coasts of North America ; 87 species (in 21 genera) have thus far been 

 recorded from the West and North-west coasts, while only 19 are known 

 to occur on the East coast of North America. The Nemertean fauna of 

 the Pacific Coast is more abundant and more diversified than in almost 

 any other region of equal extent. The usual diagnostic key is preceded 

 by a general account of the class. 



Bryozoa. 



Development of Fenestella.|| — E. R. Cumings deals with the develop- 

 ment of this Paleozoic Bryozoan, as shown in calcified material 

 (numerous bases of colonies) in which the minutest details of internal 

 structure are preserved with remarkable fidelity. The morphological 

 element of the Bryozoan colony with corresponds to the protoconch of 

 molluscs, or to the protegulum of Brachiopods, is the protcecium or 

 basal disk of the primary individual of the colony. The protcecium is 

 the calcareous or chitinous wall of the kathembryo. In Fenestella it is 



* Zool. Jahrb. Abt. Syst., xxii. (1905) pp. 477-88 (1 pi.). 



t Jenaische Zeitschr. Naturwiss., xxxviii. (1901) pp. 572-618 (3 pis.). 



j Ceylon Pearl Oyster Report, Royal Society, Part ii. (1904) pp. 127-36 (1 pi). 



§ Amer. Nat., xxxix. (1905) pp. 425-47 (9 figs.). 



11 Amer. Journ. Sci., xx. (1905) pp. 169-77 (3 pis.). 



