1894.] . Zoology. 437 
St. Lucas, Lower California. U. S. National Museum; G. Eisen. 
Bipes canaliculatus Lacép. Tail twice as long as head; preanal 
scuta small, preceded by a transverse row of small scales, each of which 
is perforated by a pore. Nasal plates well separated in front. Mex- 
ico. 
Hemichirotes tridactylus Dugés. Tail but little longer than head. 
Anus preceded by six plates of moderate size, and these by only two 
pore-bearing scales on each side. Nasal plates widely separated by 
contact of rostral and internasal. Guerrero, Mexico; A Dugés. 
Stejneger has shown that the name Chirotes Cuv. must be abandoned 
in favor of Bipes Lacép. of much earlier date. As the family name 
Chirotidae has become engrafted on our literature, I propose to retain 
the name Euchirotidae in place of it for the family, so as to disturb 
the existing custom as little as possible. 
EXPLANATION OF CUTS. 
Fig. 5.—Euchirotes diporus Cope, twice natural size. 
Fig. 6.—Hemichirotes tridactylus Dugés, twice natural size. 
Letters; a head from above; 6 profile; ¢ from below, with fore 
limbs; d tail from below; e side of body; f profile of tail; g rostral 
plate from front. . E. D. Cope. 
Zoological News.—Prorozoa.—Blochmann again replies* to the 
oft asked question, Does the contractile vacuole empty to the exterior? 
in the affirmative, 
F. Schaudinn has studied the Gromia desjardinii of Max Schultze 
and finds’ that it differs from Gromia in many respects and he pro- 
poses for it the generic name of Hyalopus. He has studied its repro- 
duction and finds that transverse fission of both animal and shell 
occurs, the process requiring about three weeks for completion, the 
mouths of the new individuals being formed in the cut ends of the 
shell, Similarly division into three has been noticed. Besides, he has 
seen in six cases the formation of swarmspores. From five to twelve 
hours before the formation of the spores the pseudopodia are retracted 
and the whole protoplasm divides into spherical portions each of which 
Contains a large nucleus. Each of these becomes amceboid and then 
develops a large flagellum. After some other phases these swarm- 
Spores copulate in pairs. ‘The history has not been followed farther. 
“Biol. Centralblatt XIV, 82, 1894. 
. Ges. Naturf. Freunda Berlin, 1884, p. 13. 
