318 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Platyh.elmintb.es. 



Australian Triclads.* — Annie Weiss gives a detailed account of six 

 new species of Planaria from Australian fresh water, paying particular 

 attention to the epithelium, musculature, alimentary system, nervous 

 system and sense-organs, and the reproductive organs. 



New Type of Turbellarian.f — Paul Hallez describes an interesting 

 new type, Bothriomolus constrictus g. etsp. n., which he found on the 

 shore at Portel, in half-brackish water, at the level where Procerodes 

 ulvse is abundant. It is one of the Alloioccela in the family Bothrio- 

 planidas, beside Bothrioplana and Otoplana. There is a sacciform gut 

 much lobed and branched in the adult. Two ovaries lie in front of the 

 pharynx. The copulatory organ has five lobes supported by spicules, 

 the anterior lobe perforated by the ejaculatory duct. Eosinophilous 

 glands open into the unpaired oviduct ; cyanophilons glands open into 

 a cavity homologous with the uterus of Triclads. There is an anterior 

 and ventral ciliated pit, connected with a frontal sensory organ ; there 

 are no lateral ciliated pits. The animal creeps about without swimming. 

 It is 5-6 mm. long by • 5 mm. broad, constricted in front and behind 

 the pharynx, opaque white in colour. Vibratile cilia are absent in the 

 adult from the dorsal surface and on the median ventral line behind the 

 pharynx. There are some filiform rhabdites in the caudal cells. The 

 front and sides of the head bear stiff cilia. Numerous adhesive papilla? 

 occur on the ventral surface, the margins, and the posterior end. 



Turbellarians of the Gulf of Trieste. J — H. Micoletzky gives a list : 

 12 Accela in 5 genera ; 25 Rhabdocoela in 17 genera ; 19 Allceoccela 

 in 8 genera, and about a dozen Polyclads. He obtained most of his 

 material among the Zostera. 



Peculiar Trematode of the Mole.§ — Richard Gonder describes Ityo- 

 gonimus lorum (Dujardin), an elongated cylindrical Trematode which 

 occurs occasionally in the intestine of the mole. It has some points in 

 common with Harmostomum, but stands markedly by itself. 



Cuticula and Subcuticula of Trematodes and Cestodes.|| — Henry 

 S. Pratt has studied this much-discussed subject, and reached the follow- 

 ing conclusions. 1. The cuticula of Trematodes and Cestodes is not 

 homologous to that of other worms and of Arthropods. 2. The cuticula 

 of Trematodes and Cestodes is the peripheral portion of the parenchyma, 

 being composed mainly of secretions of it. 3. The subcuticula is not an 

 epithelium or a hypodermis, but belongs genetically to the parenchyma. 

 4. The subcuticular cells are not present in the monogenetic Trematodes, 

 in most of the Aspidobothridas, and in many digenetic Trematodes, or in 

 any Trematodes or Cestodes during the earliest larval stages, when the 

 cuticula first forms. 5. The function of these cells is not known, and 



* Zeitschr. wiss. Zool., xciv. (1910) pp. 541-604 (4 pis. and 1 fig.). 



t Arch. Zool. Expe'r., xliii. (1910) pp. 611-64 (3 pis.). 



\ Arbeit. Zool. Inst. Univ. Wien, xviii. (1910) pp. 167-82. 



§ Centralbl. Bakt. Parasitenk., liii. (1910) pp. 169-74 (1 pi. and 3 figs.,. 



|| Amer. Nat., xliii. (1909) pp. 705-29 (12 figs.). 



