PlsSCES — CYCLOSTOMf. 
115 
has points, in which small sharp spines are concealed ; superiorly it is 
marbled with brown and grey-brown ; on the sides it has a row of black 
spots ; there is no mention of a cuticular bulb on the sides. The other, 
T. pachycephalus, has in a hollow papilla two nasal fossae ; the belly is 
rough with prickles, which stand, as it were, in the meshes of a net ; 
superiorly it is dark grey ; on the sides silvery. 
CYCLOSTOML 
The Treatise mentioned in last year’s Jaliresbericht, p. 186, 
on the Anatomy of Amphioocus lanceolatus, by John Goodsir, 
has appeared, accompanied with two lithographic plates, in 
the Transactions of the Royal Society of Edinburgh, vol. xv. 
part 1, p. 247. 
PLAGIOSTOML 
A. Alessandri has written “ Observationes super intima 
Branchiarum Striictura Piscium cartilagineorum.” (Comment. 
Acad. Bonon. iv. 1840, p. 329.) 
The two Dog Fishes described by Ranzani, from Brazil, have been, 
at a later date, also described by Miiller and Henle. His Oaleus ma- 
culatus, 1. c. iv. p. 69, is Galeocerdo tigrinus, Miill. and Henle. His 
Carcharias porosus, 1. c. iv. p. 70, is probably Carcharias (Prionodon) 
Milherti, Val. 
159 
