ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 33 



PalsBoniscid Fishes.— E. H. Traquair * reports on the fragmentary 

 remains of a Palffioniscid fish from the l)ase of the Pendleside Series, 

 near Holywell, Flint. The configuration of the mandible and maxilla 

 clearly prove that the specimen belongs to the Palgeoniscidte. Accord- 

 ing to the form and sculpture of the scales, and the configuration of 

 the jaws, the fish might appertain either to Rhadinichthys or to 

 Elonichthys. Perhaps the scales have the greatest resemblance in 

 sculpture to those of ElonicJitliys egertoni Egert., but the denticulations 

 of the posterior margin are proportionally coarser. The association of 

 fine strige with comparatively coarse denticulations of the under margin 

 is a feature which leads Dr. Traquair to regard the species as new to 

 science, and he proposes to name it ElonicJithys denticulatus. 



A. Smith Woodward f describes a specimen of Afyriolepis hihernica 

 Traquair from the Irish Coal-Measures, and gives a more complete 

 diagnosis, noting in particular the stoutness and shortness of the 

 abdominal region, and the forward position of the dorsal fin. 



Horny Teeth of Marsipobranchs.} — H. W. Marett Tims points out 

 the resemblances in structure and development between Teleostean scales 

 and the horny teeth of the lamprey. If this suggestion is correct, the 

 horny teeth must be regarded as purely dermal structures. The true 

 epidermal layer may have been absent in the specimens studied by Beard, 

 who regarded the teeth as epidermal. The horny plates may be com- 

 pared to the calcified portion of the Teleostean scale, possibly also to the 

 dentinal layer of true teeth. 



INVERTEBBATA. 



Mollusca. 

 °- Cephalopoda. 



Cranchiid8e.§ — Carl Chun gives a diagnosis and classification of this 

 family of cuttlefishes, and establishes a number of new genera — Cory- 

 nomma, Crystalloteuthis, Sandalops, Toxeuma, and Bathothauma. 



7- G-astropoda. 



Cytology of Salivary Glands in Helix pomatia.|| — M. Pacaut and 

 P. Vigier give some notes on the chromophile formations (ergastoplasm, 

 chondriomites). In the salivary glands there are five types of cell — 

 punctate, alveolar, granular, cystic, and mucous. The first two especially 

 possess chromophile formations remarkable for their size, number, and 

 diversity of aspect. Amongst these are distinguishable (1) the calotte 

 or growing chromophile in contact with the nucleus ; (2) the parasome 

 with concentric capsules, mostly spherical and occurring anywhere in the 

 cytoplasm ; there may be from 1 to 15 or more in a cell, there are often 

 several within a filamentous capsule ; (?>) the " bandelette chromophile," 



* Geol. Mag., Decade V., iii. (190G) pp. 556-7 (2 figs.). 



t Ann. Nat. Hist., xviii. (1906) pp. 416-19 (1 pi.). 



X Proc. Cambridge Phil Soc, xiii. (1906) pp. 383-6. 



§ Zool. Anzeig., xxxi. (1906) pp. 82-6. 



II Anat. Anzeig., xxvii. (1905) Ergiinzungsheft, pp. 151-3. 



Feb. 20th, 1907 D 



