•58 SUMMARY OF CURRENT RESEARCHES RELATING TO 



New Distomes.* — Henry S. Pratt institutes a new genus, Renifer 

 (= Styphlodera), for small distomes from the mouth and air-passages of 

 North American snakes and from the intestines of turtles. He describes 

 three new species. From the frog he obtained a new genus, Ostiolum, 

 with affinities with the genus Hcematolcechus of Looss. 



Incertae Sedis. 



New Enteropneustan Family.! — M. Caullery and F. Mesnil give a 

 detailed account of a form of which they had previously given some 

 notes under the name of Balanocephalus kaehleri. It appears, however, 

 to be the representative of a new family, Protobalanidte, whose characters 

 are stated thus : — The ccelome preserves the embryonic arrangement of 

 a cavity for the gland, a pair of cavities with mesentery for the collar, 

 and another pair with equally persistent mesentery for the trunk. There 

 are no lateral septa in the trunk, no perihamial cavities, and no peri- 

 pharyngeal cavities in the collar. Other characters are as in Harri- 

 maniidae. The type species is re-named Protobalanus Inrhleri. Its 

 dimensions are 4 to 6 cm. by 1 to 1*5 mm. wide. Habitat, Anse St. 

 Martin, in the English Channel, in the littoral zone. 



New Enteropneustan Species from Naples.! — J- W. Spengel gives 

 a description of the anatomy of the several regions of a new form, 

 Glossobalanus elongatus sp. n., from the Gulf of Naples, including a 

 discussion on the post- branchial gut of the Ptychoderidae. 



Young Stages of some Enteropneusta.§ — W. E. Bitter and 

 B. M. Dawis describe a Tornaria, possibly of Balanoglossus occidental is 

 Ritter, from the Californian coast. They pay particular attention to 

 the habits and reactions. Another Tornaria (T. hubbardi) is described, 

 which is equally noteworthy in having before metamorphosis five pairs 

 of gill-sacs, though still without pore and tongue. The authors also note 

 that Dolichoglossus pussillus Ritter has no Tornaria. 



Bryozoa from Franz-Josef Land.|| — A. W. Waters gives an account 

 of the Cyclostomata, Ctenostomata, and Endoprocta collected by the 

 Jackson-Harmsworth expedition, 1896-97. 



Echinoderma. 



Revision of the Blastoids.H— G-. Hambach offers a re-classification 

 based mainly on the construction of the summit openings. Next the 

 development of the deltoids is considered, also the aspect of the outer 

 surface. He recognises two orders : I. Regulares, including Pentremidrc 

 ( J'eiitreiii/tes, Cribloblastus, Saccoblastus, Clavablastus, Mesoblastus, 

 Cidwoblastus, Globoblaslus, Codonites), and Codasteridas (Codaster)\ 

 II. Irregulares, including Olivanidaj (Olivanites) and Eleutheroblastidse 



* Mark Anniv. Vol.. 1903, pp 23-38 (1 pi). 

 + Zool. Jahrb., xx. (1904) pp. 227-56.. 

 % Tom. cit., pp. 315-62 (3 pis.). 



§ Univ. California Publications: Zoology, i. (1904) pp. 171-210 (4 pis.). 



|| .lourn. Linn Soc, xxix. (1904) pp. 161-84 (3 pie.). 

 «J Trans. Acad. Bci. St. Louis, xiii. (1903; pp. 1-67 (6 pis.). 



