474 
CCELENTERATA. 
Reef and Tortugas, 35-37 fath. ; A. arcticaf sp. n., Liitken, Overs. Dan. Selsk. 
1871, pp. 18-26, fig., N. Greenland, found in stomach of a shark (Sci/mnus 
microcephalus). Chiefly remarkable as a representative of a group which, 
until its discovery in the British seas by Wyville Thomson, was not thought 
to extend further north than the Mediterranean and S. Carolina. A brief 
notice is added of the distribution of the allied species, and of the depths at 
which they occur. 
Madreporauia. 
L. F. DE PouRTALES (Illustrated Catalogue of the Museum of Compara- 
tive Zoology at Harvard College. No. IV. Deep-sea Corals. Cambridge, U.S. 
Roy. 8vo, 1871, pp. 93, 7 plates and map) gives a detailed account of the 
specimens obtained by the U.S. Coast Survey for the exploration of the 
Gulf-stream, in 1867-1869. The following known species (nearly all pre- 
viously described by himself in Bull. Mus. Comp. Zool.) are figured : — 
Caryophyllia formosa, pi. 1. fig. 16 ; C. corniformis, figs. 14, 15 j Para- 
cyathus confertus, pi. 6. figs. 11-1 3 (also found at the Azores) ; Leptocyathus 
stimpsonif pi. 3. figs. 1-3 j Thecocyathus cylindraceus, pi. 2. figs. 14 & 16 ; 
Trochocyathus (?) coronatus^ pi. 6. fig. 16 ; Peltocyathm ayassizi^ pi. 2. figs. 1-5, 
pi. 6. figs. 9 & 10 j D. cailletij Duch. & Mich. pi. 1. figs. ] 7 & 18 j Rhizotrochus 
frayilis, pi. 4. figs. 1-4 j Oculina varicosa, Les., pi. 6. figs. 3 & 4; Diplohelia 
profunda, pi. 6. figs. 6 & 7 ; Lophohelia prolifer a, M.-Edw. & H. ( = X. ajfinis, 
Pourt., olim) ; Madracia aspcrida^ M.-Edw. & II., pi. 7. fig. 4; M. decactiSf 
Verr., figs. 1-3 ; Stylaster erubescens, pi. 4. figs. 10 & 11 j S. co?nplanatiis, pi. 2. 
figs. 16 & 17 J Cryptohelia peircii, figs. 18 & 19 ; Allopora miniata, pi. 3. figs. 
14-16 ; Distichopora sidcata, pi. 4. fig. 14, pi. 7. fig. 7 ; D. foliacea, pi. 4. figs. 
12 & 13; Errhina carinata, pi. 6. fig. 6 ; Balanophylliajloi'idana, pi. 4. figs. 6 & 6 j 
Thecopsammia tintinnahulumj pi. 1. figs. 9-11 ; T. socialis, pi. 2. figs. 9 & 10 j 
Eiaseris pusilla, figs. 6-8 ; Pliobothrus symmetricus, pi. 4. figs. 7 & 8 ; P. tubu- 
latus, fig. 9. 
Pourtales (/. c.) rejects as unnatural the division of the Turbinolidce into the 
subfamilies Caryophyllhice and Turbinolimey characterized by the presence or 
absence of pali. The group Trochosmiliacece, M.-Edw. & II., is raised into 
a family, 'Prochosmilidce (p. 18), differing from the Turbinolidce in the presence 
of dissepiments closing the interseptal chambers. The StylopJiorince or Pseud- 
octdince, M.-Edw. & II., are also raised into a family, Stylophoridce (p. 26), 
. but no characters are given. The following table of the genera of Sty- 
laster idee is : — 
With distinct septa. 
Stylasteridje. ; 
Septa obliterated, in- 
terseptal chambers 
distinct from fossa. 
( Callicles regular. 
Gemmation j Sty taster. 
< alternate. 1 Callicles labiate. 
( Cryptohelia. 
Gemmation irregular. AUopora. 
Callicles confluent on edge of co- 
rallum Distichopora. 
Callicles labiate .... Lepidopora. 
\ Callicles without lip. Errhina. 
The Catalogue ends with tables of geographical and bathymetrical distri- 
bution, and a list of Reef Corals. 
The researches of Agassiz and Pourtales on Madrepores &c. are noticed, 
Arch. Sci. Nat. xli. pp. 90-94. 
