30 ERECTING ARRANGEMENT FOR BINOCULAR MICROSCOPES. 
LATE 2. 
Ficg.1. AMBLYOPSIS SPELZUS oop Natural siz 
la. Stomach and pyloric debt Price e size. 
1b. Scale, magnified. 
; lc. Abdominal cavity, showing position of stomach and single ovary. Natural 
iz 
FIG. 2. HOLOGASTER CORNUTUS Agassiz. Natural s 
2a. ahi and pyloric appendages. Twice SLORY size. 
2b. Scale. magnifier 
2c. gc mee cavi ity, saer stomach and single ovary behind the stomach. 
wice natural s 
Fie. 3. Takasi EE E Girard. Natural size. 
3a. Stomach and TA appendages. Twice natural size 
3b. Scale, magni 
FIG. 4. CHOLOGASTER yee Putnam. Natural size. 
4a. Stomach and a appendages. Twice natural size. E 
4b. Scale, magnifi: ; 
The scales minti ed on the plate are all from the second or third row under the dorsal 
4b is represented with the posterior margin down, all the others are represented 
with legs posterior margin “n Po taft: ane pater: pizp of the scales is given by the 
; 4b is so small that the natural 
size can hardly be represented by the black dot. 
NOTE TO ARTICLE IN DECEMBER NUMBER, BY A. 8. PACKARD 
Since my article was printed, Prof. Cope’s article entitied ‘ Life in the Wyan- 
dotte Cave” has sigan gs in the “ Annals and Magazine of Natural History” (Lon- 
November. 
on) 
eave; “ Anophthalmus No. and Another bs gpd cig = cies = Staphylinide; 
Rap! aroptanbpi a; two — cies of flies; an A er: a species of 
Pseudotremia; Cam s pellucidus, an unknown iate Crustacean with pre” 2 
egg pouches. and a Ternean (crustacean) Logie bo = ind fish. Of these one 
meine ane tise ‘gated the cen- 
tipede, mi ‘the blind canal are > probably the same ‘as s those found in the M mmoth 
Cav o beetles and t aceans are certa se different arn those of the 
‘atten. aa the cen siete a are gical The Gammaroid crustacean 
found in the waters of the Mammoth Cave: wea peto is no doubt in pai: the food of 
the blind ask; we did Bot find; but some snol species no Sows exists, | as we we r ; 
NEW ERECTING ARRANGEMENT, ESPECIALLY 
DESIGNED FOR USE WITH BINOCULAR 
MICROSCOPES. 
BY R. K. WARD, M.D. 
For dissecting and other manipulations under magnifying po . 
ers, the simple microscope is awkward and unsatisfactory, 
has been made to serve as a binocular only with low powers ; but 
the superb field of the compound microscope has been compan 7 
tively little used for these purposes because few persons can W 
to advantage under an inverting arrangement, the erectors usually 
