98 DAVIS : NOTE ON CHLAMYDOSELACHUS. 
2. Pinnatopora ornata, reverse showing- the linear arrangement of 
granulations. 
3. single cell enlarged to show character. 
4. Pinnatopora simplex, n. sp. 
5. Pol^^pora veri-ucosa (?) provisional. 
G. Thamniscus g-racilis, n. sp., 6a showing reverse and portion of 
margin. 
7. Streblotrj^pa (?) var. minuta, new var. 
8. ., other examples Sa and 9. 
10. Rhombopora ? vinculariformis, new sp. 
11. Rhabdomeson gracile, Phill. 
NOTE ON CHLAMYDOSELACHUS ANGUINEUS, GAEMAN. BY JAMES 
W. DAVIS, F.G.S. 
It is proposed to draw attention to an existing species of 
Selachian obtained by Prof. II. A. Waid along with other natural 
history specimens in Japan. It was after x^ards purchased for the 
Museum of Comparative Zoology, at Harvard College, and ia 
January, 1884, Mr. S. Garman, of Agassiz Museum, Cambridge, 
U.S.A., gave a preliminary description of the fish in the BuUetiu of 
the Essex Institute, Yol. XVI., in which he recognised it as belong- 
ing to a new family, and confered upon it the generic and specific 
names at the head of this note. A further contribution, entitled, "A 
Peculiar Selachian," appeared in " Science," a weekly American 
journal, on Feby. 1st, 1884 (Vol. III., p. 116). In this it is stated 
that " the body is long and slender, five feet in total length, and less 
than four inches in greatest diameter ; it becomes compressed and 
thin towards the tail. The head is broad, slightly convex on the 
crown. The mouth is anterior and very wide. As in other sharks 
the teeth aie arranged in rows across the jaws ; they are all alike. 
Each tooth has three slender, curved, in ward -directed cusps, and a 
broad base, which extends back in a pair of points under the next 
tooth, thereby securing firumess and preventing reversion. There 
are six gill openings : the anterior one very wide. Unlike other 
