SOLENOSTOMA. 
107 
Explanation of Plate I. 
Solenostoma laciniatum. 
Fig. 1.—Branched dermal process from the brood-pouch, showing 
stalked ovigerous discs. 
Fig. la .—An egg containing an unpigmented embryo coiled once 
round the yolk ; diameter, 0'7 mm.; t, tail; op, optic vesicle ; v, 
vitellus or yolk with oil globules ; au, auditory sac. 
Fig. 16.—Egg containing an advanced embryo twice coiled round 
the yolk, with pigmented eyes. 
Fig.,2.—Sketch of the adult fish, showing the lacinise. Nat. size. 
Fig. 3.—Hatchling showing pigment tracts on the body and oil- 
globules in the yolk-sac ; the pectoral fin is seen above the latter. 
Length 3*75 mm. 
Fig. 4.—Larva at the second stage ; the head is released from the 
yolk-sac. The pectoral fin was obscure in the preparation. Length, 
4 mm. 
Fig. 5.—Larva at the third stage. The oesophagus shows by 
transparency in front of the pectoral fin, and the heart below the 
oesophagus. The projection of the basibranchiai apparatus in the 
gular region is normal. Length, about 4*5 mm. 
Fig. 6.—Anterior end of brood-pouch larva at the fourth stage. 
The outline was drawn under Zeiss 2A, cam. luc. The pectoral fin 
is omitted, but its basal pigment is seen in front of the humeral arch. 
1. Meckel’s cartilage. 
2. Palato-pterygoid arcade. 
3. Quadrate. . 
4. Ethmoid. 
5. Symplectic. 
6. Nasal sac. 
7. (Esophagus. 
8. Basibranchiai muscle. 
9. Heart. 
10 
to 
12 . 
13. 
14. 
15. 
16. 
17. 
Liver. 
Bile-duct (obscure). 
Front end of embryonic fin. 
Intestine. 
Pyloric complex. 
Humeral arch. 
The basibranchiai muscle is seen to be accompanied at its origin 
by a transverse cartilaginous process. 
