408 Miscellaneous. 



anterior and posterior snags, and have numerous beads round various 

 parts of the lower half, some of which are large and covered with 

 tubercles. Height at the withers 26 inches ; length to the place of 

 the tail 41 inches ; length of the hind leg to the hock 12 inches. 



A new British Callithamnion. By Dr. J. E. Gray, P.R.S. &c. 



The Seriospora Gnffithsiana has long been known as an inhabitant 

 of the coast of Devonshire. Agardh refers it to the genus CaUi- 

 ihamnion, and calls it C. seriosperimim — which was the specific name 

 that Mrs. Griffiths first gave to it ; and she was the first discoverer of 

 it. Dr. Harvey considered it a variety of Callithamnion ver- 

 sicolor, but afterwards corrected this. We have never yet found spe- 

 cimens of the true Callithamnion versicolor on the British coast ; for 

 it is very distinct from Callithamnion corymhosum, of which Dr. 

 Harvey thinks it is a synonym. 



Mr. Holmes kindly presented to Mrs. Gray a series of specimens 

 which he had obtained in Plj^moiith Sound, of a form which, he said, 

 had only been observed very lately, and diff'ered from the usual 

 Seriospora, which has the spore-^ at the end of the branches, in having 

 them in the first lower branchlet on the inner side of the branches, 

 as in other Callithamnia. I have examined the specimens ; and 

 there is no doubt of their being the true Callithamnion versicolor, 

 very distinct from the Seriospora. The C. versicolor has the spores 

 triangularly divided, while in the genus Seriospora they are cru- 

 ciately divided. It is a most interesting addition to our flora. 



It is very curious that the majority of the Plymouth collectors 

 regard Seriospora Griffithsiana and Callithamnion versicolor as 

 varieties of the same species, the different kinds of fruits being pro- 

 ductions of diff'erent seasons on the same plant ; but they must have 

 overlooked the diff'erent forms of the sphaerospores. 



On Macroxus tephrogaster. By Dr. J. E. Gray, F.R.S. &c. 



In the ' Annals and Magazine of Natural History' for 1867 (xx. 

 p. 431) I described a species of American squirrel as Macroxus tephr-o- 

 gaster, which was sent from Guatemala, Bogota, and Honduras ; I 

 also mentioned that M. Salle had sent it from Mexico. 



Mr. E. Garrard, Junior, has shown me five specimens from MedeUin, 

 Antioquia, in the New-Granadan Confederation, South America. 

 They are all not above half the size of the more southern specimens ; 

 and I should be inclined to regard them as a variety or species, under 

 the name of Macroxus medellinensis. 



Two specimens in the Museum, bought from Mr. Gerrard, Junior, 

 vary in the extent of the black mark and of the white on the under- 

 side. In the larger specimen the dorsal patch begins at the back of 

 the neck and extends to the base of the tail, being very broad just 

 behind the shoulders, and the white on the underside only occupies 

 the middle of the throat, chest, and belly, the sides being greyish, 

 having the rest of the hairs black. The smaller specimen has a very 

 indistinct dorsal streak, with a squarish black spot on the middle of 

 the back, which appears to be further back than the broad part of 

 the patch on the other specimen ; the throat, chest, abdomen, and 

 inside of limbs much more white than in the other specimen. 



